Date   

Re: Solari Flip Clock Driver

Darren Conway
 

Hi

I have my Solari flip clock.  It is dirty but complete.

The plan is to clean and lubricate. I do not intend to return it to as-new condition.  The patina and wear is part of its history.

It has a 48V coil which could be a problem.

I will replace the fluorescent tube with an LED version to reduce power consumption.  The tube and fitting looks like a retrofit.

I have no idea what the age is.






Regards

Darren Conway
New Zealand


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Re: Master Clock contact spark quenching

Darren Conway
 

Hi

Prior to Covid, delivery from China was usually 4-8 weeks.   I currently have 13 items on order that I am waiting for.  The oldest order is 22 Oct 2020. 

The problem here is that most of those small packages were carried by passenger aircraft.  Those services aren't running and there is big demand the slower and now more expensive channels.


Regards

Darren Conway
New Zealand


On 6.01.21 11:55 am, Tony Nixon wrote:
Darren,
I am really surprised that the delivery time from China to NZ is so long.  I have been buying Arduino and other small electronic parts from China using ebay for the last 5 years, generally keeping orders below GBP10 to avoid attracting duty.  Delivery has usually been 2-3 weeks (and free too!)  Most of the same parts can also be purchased from UK suppliers on a weeks turn round but at about double the price.  Are there no similar suppliers in NZ?

I have noticed in the last two months though that free delivery seems to be disappearing, I read somewhere that some concessionary deals offerd to the Chinese for cheap shipment have now ended.  A more worrying development that I have just started to hear about is that post Brenxit the UK is apparently going to require all suppliers selling into the UK to register to pay VAT with the UK authorities.  One European supplier (of bike parts) has apparently already decided no longer to deal with customers in the UK.

I am just beginning to experiment with an ESP8266 Node MCU to get a time stamp from NTP to log temperature, pressure and error on my Pulsynetic.

Regards

Tony
On 5 Jan 2021, at 19:48, Darren Conway <darren.conway@...> wrote:

Hi

Here is a Aduino  Motor shield that would be ideal for driving the Gents and Solari slave  clocks. 


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 6.01.21 7:12 am, Darren Conway wrote:

Hi

If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice.  I already have one.

An Aduino with ready made shield is probably the easiest way to convert a 30 second pulse to a one minute bipolar drive for the flip clock.  Easier than building from discrete components.  If I do that, then using the Aduino as an electronic relay to drive the slave clocks would make sense.

I am thinking of using a cheap Chinese motor/power switch shield with an Aduino to generate the bipolar drive for the flip clock.   Generating a bipolar signal requires and H driver circuit, as used to drive stepper motors or DC motors.   If I get a Auduino wifi version, there is the potential to use an on-line NTP server as the master clock, complete with automatic daylight time corrections.    The only problem is that shipping times from China are currently about 3 to 6 months.


The master still needs to drive its own solenoid coil and case fitted slave, so a snubber circuit would still serve a purpose.

Regards

Darren Conway
New Zealand


On 5.01.21 10:54 pm, John Haine wrote:
That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 

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Re: Master Clock contact spark quenching

neil
 

Darren - i am still buying electronic supplies from China, and turnaround is a few weeks. If the value is low, then GST is not an issue - so far anyway.
Neil Jepsen. B.Sc. M.Sc(Hons).CPL.MASNZ.
Jepsen Acoustics & Electronics Ltd
22 Domain Street
Palmerston North.
New Zealand.
Ph +64 6 3577539  Mob 0274428094
Web site: www.noiseandweather.co.nz
          www.noiseandweather.com  
E.& O.E.
On 6/01/2021 11:55 am, Tony Nixon wrote:

Darren,
I am really surprised that the delivery time from China to NZ is so long.  I have been buying Arduino and other small electronic parts from China using ebay for the last 5 years, generally keeping orders below GBP10 to avoid attracting duty.  Delivery has usually been 2-3 weeks (and free too!)  Most of the same parts can also be purchased from UK suppliers on a weeks turn round but at about double the price.  Are there no similar suppliers in NZ?

I have noticed in the last two months though that free delivery seems to be disappearing, I read somewhere that some concessionary deals offerd to the Chinese for cheap shipment have now ended.  A more worrying development that I have just started to hear about is that post Brenxit the UK is apparently going to require all suppliers selling into the UK to register to pay VAT with the UK authorities.  One European supplier (of bike parts) has apparently already decided no longer to deal with customers in the UK.

I am just beginning to experiment with an ESP8266 Node MCU to get a time stamp from NTP to log temperature, pressure and error on my Pulsynetic.

Regards

Tony
On 5 Jan 2021, at 19:48, Darren Conway <darren.conway@...> wrote:

Hi

Here is a Aduino  Motor shield that would be ideal for driving the Gents and Solari slave  clocks. 


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 6.01.21 7:12 am, Darren Conway wrote:

Hi

If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice.  I already have one.

An Aduino with ready made shield is probably the easiest way to convert a 30 second pulse to a one minute bipolar drive for the flip clock.  Easier than building from discrete components.  If I do that, then using the Aduino as an electronic relay to drive the slave clocks would make sense.

I am thinking of using a cheap Chinese motor/power switch shield with an Aduino to generate the bipolar drive for the flip clock.   Generating a bipolar signal requires and H driver circuit, as used to drive stepper motors or DC motors.   If I get a Auduino wifi version, there is the potential to use an on-line NTP server as the master clock, complete with automatic daylight time corrections.    The only problem is that shipping times from China are currently about 3 to 6 months.


The master still needs to drive its own solenoid coil and case fitted slave, so a snubber circuit would still serve a purpose.

Regards

Darren Conway
New Zealand


On 5.01.21 10:54 pm, John Haine wrote:
That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 

Virus-free. www.avast.com


Re: Master Clock contact spark quenching

Tony Nixon
 

Darren,
I am really surprised that the delivery time from China to NZ is so long.  I have been buying Arduino and other small electronic parts from China using ebay for the last 5 years, generally keeping orders below GBP10 to avoid attracting duty.  Delivery has usually been 2-3 weeks (and free too!)  Most of the same parts can also be purchased from UK suppliers on a weeks turn round but at about double the price.  Are there no similar suppliers in NZ?

I have noticed in the last two months though that free delivery seems to be disappearing, I read somewhere that some concessionary deals offerd to the Chinese for cheap shipment have now ended.  A more worrying development that I have just started to hear about is that post Brenxit the UK is apparently going to require all suppliers selling into the UK to register to pay VAT with the UK authorities.  One European supplier (of bike parts) has apparently already decided no longer to deal with customers in the UK.

I am just beginning to experiment with an ESP8266 Node MCU to get a time stamp from NTP to log temperature, pressure and error on my Pulsynetic.

Regards

Tony

On 5 Jan 2021, at 19:48, Darren Conway <darren.conway@...> wrote:

Hi

Here is a Aduino  Motor shield that would be ideal for driving the Gents and Solari slave  clocks. 


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 6.01.21 7:12 am, Darren Conway wrote:

Hi

If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice.  I already have one.

An Aduino with ready made shield is probably the easiest way to convert a 30 second pulse to a one minute bipolar drive for the flip clock.  Easier than building from discrete components.  If I do that, then using the Aduino as an electronic relay to drive the slave clocks would make sense.

I am thinking of using a cheap Chinese motor/power switch shield with an Aduino to generate the bipolar drive for the flip clock.   Generating a bipolar signal requires and H driver circuit, as used to drive stepper motors or DC motors.   If I get a Auduino wifi version, there is the potential to use an on-line NTP server as the master clock, complete with automatic daylight time corrections.    The only problem is that shipping times from China are currently about 3 to 6 months.


The master still needs to drive its own solenoid coil and case fitted slave, so a snubber circuit would still serve a purpose.

Regards

Darren Conway
New Zealand


On 5.01.21 10:54 pm, John Haine wrote:
That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 

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Re: Solari Flip Clock Driver

Ian Richardson
 

Ernie,

This is as good a place as any to get the response you seek.  Unfortunately, I can't be of immediate help, but I do have a fully operational T&N clock here, driving a couple of slave dials.  If required, therefore, I could examine and photograph the polarity reverser if that would help you.

It is in essence a rotary switch driven by the same weight/wheel/spring arrangement which drives the clock.  It is released once per minute by the clock and rotates through 180 degrees and delivers the signal to the slaves via a commutator switch.  At each half revolution, it makes contact with the opposite polarity for the next impulse.  As I said, I could photograph if that helps, but it may not be that easy to make a copy from photos.  I don't have any spare parts, but maybe someone out there has a spare movement which you could canibalise.

Good luck finding the parts you need, but let me know if photos would help.

Best regards,
Ian R
Auvergne, France




-----Original Message-----
From: Ernie Jenson via groups.io <erniejenson@...>
To: synchronome1@groups.io <synchronome1@groups.io>
Sent: Tue, 5 Jan 2021 22:35
Subject: Re: [synchronomeelectricclock] Solari Flip Clock Driver

I posted but didn't get a response.  I'm not sure that this is the right place for this post.  I have a T&N clock with several slaves.  The slaves need a 24 VDC plus and minus to work.  The attachment to provice the slave input is missing from my clock.  Does anyone have an idea how to find this part or duplicate it?
Thank you all for any help.  I enjoy reading this site.


Re: Solari Flip Clock Driver

Ernie Jenson
 

I posted but didn't get a response.  I'm not sure that this is the right place for this post.  I have a T&N clock with several slaves.  The slaves need a 24 VDC plus and minus to work.  The attachment to provice the slave input is missing from my clock.  Does anyone have an idea how to find this part or duplicate it?
Thank you all for any help.  I enjoy reading this site.


Re: Master Clock contact spark quenching

Darren Conway
 

Hi

Here is a Aduino  Motor shield that would be ideal for driving the Gents and Solari slave  clocks. 


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 6.01.21 7:12 am, Darren Conway wrote:

Hi

If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice.  I already have one.

An Aduino with ready made shield is probably the easiest way to convert a 30 second pulse to a one minute bipolar drive for the flip clock.  Easier than building from discrete components.  If I do that, then using the Aduino as an electronic relay to drive the slave clocks would make sense.

I am thinking of using a cheap Chinese motor/power switch shield with an Aduino to generate the bipolar drive for the flip clock.   Generating a bipolar signal requires and H driver circuit, as used to drive stepper motors or DC motors.   If I get a Auduino wifi version, there is the potential to use an on-line NTP server as the master clock, complete with automatic daylight time corrections.    The only problem is that shipping times from China are currently about 3 to 6 months.


The master still needs to drive its own solenoid coil and case fitted slave, so a snubber circuit would still serve a purpose.

Regards

Darren Conway
New Zealand


On 5.01.21 10:54 pm, John Haine wrote:
That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 

Virus-free. www.avast.com


Re: Master Clock contact spark quenching

Darren Conway
 

Hi

If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice.  I already have one.

An Aduino with ready made shield is probably the easiest way to convert a 30 second pulse to a one minute bipolar drive for the flip clock.  Easier than building from discrete components.  If I do that, then using the Aduino as an electronic relay to drive the slave clocks would make sense.

I am thinking of using a cheap Chinese motor/power switch shield with an Aduino to generate the bipolar drive for the flip clock.   Generating a bipolar signal requires and H driver circuit, as used to drive stepper motors or DC motors.   If I get a Auduino wifi version, there is the potential to use an on-line NTP server as the master clock, complete with automatic daylight time corrections.    The only problem is that shipping times from China are currently about 3 to 6 months.


The master still needs to drive its own solenoid coil and case fitted slave, so a snubber circuit would still serve a purpose.

Regards

Darren Conway
New Zealand


On 5.01.21 10:54 pm, John Haine wrote:
That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 

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Re: Solari Flip Clock Driver

Darren Conway
 

Hi

A T&N might be the perfect solution but finding one in this part of the world would be difficult.    Getting fiscal approval from my better half to buy one would be even more difficult.


Regards

Darren Conway
New Zealand


On 5.01.21 10:43 pm, Ian Richardson via groups.io wrote:
T&N master clock

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Re: Master Clock contact spark quenching

John Haine
 

That's because it's opto isolated, it needs a current of ~3 mA into the input pin to light up the internal LED, so you drive it through a suitable resistor to get that current from whatever voltage is across the contacts.  In this case with 12 V that would be 12/3 = 4 K ohms, or 3.9 K NPV. 


Re: Master Clock contact spark quenching

Ian Richardson
 

Pardon me being thick, but the RS relay you quote doesn't seem to specify a driver voltage?

Ian R



-----Original Message-----
From: John Haine <john.haine@...>
To: synchronome1@groups.io
Sent: Tue, 5 Jan 2021 10:40
Subject: Re: [synchronomeelectricclock] Master Clock contact spark quenching

As it's now 2021 you could consider using a solid state relay - silent, should last for ever, no inductive kick to make any arcs across the clock contacts.

https://uk.rs-online.com/web/p/solid-state-relays/9061079/

RS sell 'em in 5s which is inconvenient unless you have a use for the other 4, or could share a pack.  There are probably other suppliers - in fact eBay:
have them at double the price in ones though.


Re: Solari Flip Clock Driver

Ian Richardson
 

Darren,

As you are obviously an electric clock enthusiast, maybe the best solution is to buy a T&N master clock for your Solari clock.  The T&N system generates 24vdc in alternate polatarity - made for the job.  

Note that not all Solari clocks are the same - I have one which uses unique polarity and is running on my house system driven by a Gent "Thornbridge" clock.  I have also seen the alternate polarity ones and it's only the motor which is different.

Good luck and happy clunking,
Ian R
France
(formerly Macclesfield, UK)



-----Original Message-----
From: Darren Conway <darren.conway@...>
To: synchronome1@groups.io
Sent: Tue, 5 Jan 2021 9:36
Subject: Re: [synchronomeelectricclock] Solari Flip Clock Driver

Hi Neil
My research on my new, very old Solari clock indicates it is fed with a bipolar 24V impulse.  Not compatible with Synchronome slave clock pulses.
I am interested in your driver.  How does it work?  Is it programmable?

Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 3.01.21 10:49 pm, neil wrote:
Hi Darren,
On my driver I have buttons that advance or lose 1sec,1min and 1 hr. Makes adjustment and keeping track of DST much easier. With 2 slaves in series, it's a pain if they don't track. The gents relies on gravity for one of the wheel panels so they both need to be vertical when testing.
Neil

On Sun, 3 Jan 2021, 9:23 pm Darren Conway, <darren.conway@...> wrote:
Hi
I have my master nome running nicely.  I am now ready to connect a couple of Gents slave clocks to it.  
The Gents mechanisms are sealed in Bakelite enclosures, so the only way I know to advance them is to apply pulses.   I could open them up, but that would void the warranty.  ☺
I understand how to wire up the master and slaves and the requirement to set the current.
What is the method to align the clocks so they all display the same time?
I was thinking of including a rotary encoder that I could use to apply pulses manually. 

Regards

Darren Conway




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Re: Master Clock contact spark quenching

John Haine
 

As it's now 2021 you could consider using a solid state relay - silent, should last for ever, no inductive kick to make any arcs across the clock contacts.

https://uk.rs-online.com/web/p/solid-state-relays/9061079/

RS sell 'em in 5s which is inconvenient unless you have a use for the other 4, or could share a pack.  There are probably other suppliers - in fact eBay:
have them at double the price in ones though.


Re: Solari Flip Clock Driver

neil
 

Yes it is, but to do alt polarity is a but more tricky but can be done.
I'll send you a spec on the driver tomorr.
Neil

On Tue, 5 Jan 2021, 9:36 pm Darren Conway, <darren.conway@...> wrote:

Hi Neil

My research on my new, very old Solari clock indicates it is fed with a bipolar 24V impulse.  Not compatible with Synchronome slave clock pulses.

I am interested in your driver.  How does it work?  Is it programmable?


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 3.01.21 10:49 pm, neil wrote:
Hi Darren,
On my driver I have buttons that advance or lose 1sec,1min and 1 hr. Makes adjustment and keeping track of DST much easier. With 2 slaves in series, it's a pain if they don't track. The gents relies on gravity for one of the wheel panels so they both need to be vertical when testing.
Neil

On Sun, 3 Jan 2021, 9:23 pm Darren Conway, <darren.conway@...> wrote:

Hi

I have my master nome running nicely.  I am now ready to connect a couple of Gents slave clocks to it.  

The Gents mechanisms are sealed in Bakelite enclosures, so the only way I know to advance them is to apply pulses.   I could open them up, but that would void the warranty.  ☺

I understand how to wire up the master and slaves and the requirement to set the current.

What is the method to align the clocks so they all display the same time?

I was thinking of including a rotary encoder that I could use to apply pulses manually. 


Regards

Darren Conway




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Re: Solari Flip Clock Driver

Darren Conway
 

Hi Neil

My research on my new, very old Solari clock indicates it is fed with a bipolar 24V impulse.  Not compatible with Synchronome slave clock pulses.

I am interested in your driver.  How does it work?  Is it programmable?


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 3.01.21 10:49 pm, neil wrote:
Hi Darren,
On my driver I have buttons that advance or lose 1sec,1min and 1 hr. Makes adjustment and keeping track of DST much easier. With 2 slaves in series, it's a pain if they don't track. The gents relies on gravity for one of the wheel panels so they both need to be vertical when testing.
Neil

On Sun, 3 Jan 2021, 9:23 pm Darren Conway, <darren.conway@...> wrote:

Hi

I have my master nome running nicely.  I am now ready to connect a couple of Gents slave clocks to it.  

The Gents mechanisms are sealed in Bakelite enclosures, so the only way I know to advance them is to apply pulses.   I could open them up, but that would void the warranty.  ☺

I understand how to wire up the master and slaves and the requirement to set the current.

What is the method to align the clocks so they all display the same time?

I was thinking of including a rotary encoder that I could use to apply pulses manually. 


Regards

Darren Conway




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Re: Master Clock contact spark quenching and Solari Udine flip clock

Darren Conway
 

Hi

The listing claims it is a slave clock.  I hope it is.


Regards

Darren Conway
36 Orr Crescent
Lower Hutt
New Zealand
ph +64  (0)4 569 1963

On 5.01.21 7:53 pm, klopschip via groups.io wrote:
Hi Darren

Solari clocks are usually either autonomous (electrical rewound stand alone) or slave clocks that need alternating pulses. Tension varies from 1.5V (specials for French systems like Billie) to 60 Volts, sometimes there is the choose between 2 tensions (e. g 24 and 48 Volts) . Nice clock! 

Best regards
Bart 


Op di, jan. 5, 2021 om 7:25 schreef Darren Conway

Hi

I have some relays that will do the job but I am thinking that a cheap Chinese opto-coupler might be a better solution.

Even a single relay will generate a spark at the contact.  So there would be benefit in fitting a snubber. In the interests of aesthetics, it would be better to install this on the back of the frame out of sight.

As far as I can tell, it looks like the cast iron frame is held on with a big round head screw and two studs with double nuts.


I have just today purchased by on-line auction this Solari Udine flip clock.   I haven't picked it up yet so I hope it is complete.   I know it needs 24VDC so a relay driver or opto-coupler would be good options.


I can see that it is missing the makers label lower centre that looks like this:

I could reproduce it, but I would rather find an original part.   Does anyone know where I might find this part?
Large
                        Station, Airport, Factory Wall Flip Clock by
                        Gino Valle for Solari Udine In Excellent
                        Condition In Vienna, ATLarge
                        Station, Airport, Factory Wall Flip Clock by
                        Gino Valle for Solari Udine In Excellent
                        Condition In Vienna, AT

Regards

Darren Conway
New Zealand


On 5.01.21 12:55 pm, Tracy and Raymond van Orsoy de Flines wrote:
Best is to use a relay. I got a Gents masterclock (Hipp Toggle) and run the 30 second slave clocks through a relay.

On Tue, 5 Jan 2021, 12:50 Darren Conway <darren.conway@...> wrote:

Hi

I now have 1 Master and 2 Slaves running from a 12V supply.  There is enough resistance to limit the current to within spec (~240mA).

I am seeing arcing across the Master clock contacts.    This can't be good.

Is there a standard solution to this problem?  If not, I would add an RC snubber between the top terminal and the cast iron frame from the back.


Regards

Darren Conway




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Re: Master Clock contact spark quenching and Solari Udine flip clock

klopschip
 

Hi Darren

Solari clocks are usually either autonomous (electrical rewound stand alone) or slave clocks that need alternating pulses. Tension varies from 1.5V (specials for French systems like Billie) to 60 Volts, sometimes there is the choose between 2 tensions (e. g 24 and 48 Volts) . Nice clock! 

Best regards

Op di, jan. 5, 2021 om 7:25 schreef Darren Conway
<darren.conway@...>:

Hi

I have some relays that will do the job but I am thinking that a cheap Chinese opto-coupler might be a better solution.

Even a single relay will generate a spark at the contact.  So there would be benefit in fitting a snubber. In the interests of aesthetics, it would be better to install this on the back of the frame out of sight.

As far as I can tell, it looks like the cast iron frame is held on with a big round head screw and two studs with double nuts.


I have just today purchased by on-line auction this Solari Udine flip clock.   I haven't picked it up yet so I hope it is complete.   I know it needs 24VDC so a relay driver or opto-coupler would be good options.


I can see that it is missing the makers label lower centre that looks like this:

I could reproduce it, but I would rather find an original part.   Does anyone know where I might find this part?
Large Station, Airport, Factory Wall Flip Clock by               Gino Valle for Solari Udine In Excellent Condition In               Vienna, ATLarge Station, Airport, Factory               Wall Flip Clock by Gino Valle for Solari Udine In               Excellent Condition In Vienna, AT

Regards

Darren Conway
New Zealand


On 5.01.21 12:55 pm, Tracy and Raymond van Orsoy de Flines wrote:
Best is to use a relay. I got a Gents masterclock (Hipp Toggle) and run the 30 second slave clocks through a relay.

On Tue, 5 Jan 2021, 12:50 Darren Conway <darren.conway@...> wrote:

Hi

I now have 1 Master and 2 Slaves running from a 12V supply.  There is enough resistance to limit the current to within spec (~240mA).

I am seeing arcing across the Master clock contacts.    This can't be good.

Is there a standard solution to this problem?  If not, I would add an RC snubber between the top terminal and the cast iron frame from the back.


Regards

Darren Conway




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Master Clock contact spark quenching and Solari Udine flip clock

Darren Conway
 
Edited

Hi

I have some relays that will do the job but I am thinking that a cheap Chinese opto-coupler might be a better solution.

Even a single relay will generate a spark at the contact.  So there would be benefit in fitting a snubber. In the interests of aesthetics, it would be better to install this on the back of the frame out of sight.

As far as I can tell, it looks like the cast iron frame is held on with a big round head screw and two studs with double nuts.


I have just today purchased by on-line auction this Solari Udine flip clock.   I haven't picked it up yet so I hope it is complete.   I know it needs 24VDC so a relay driver or opto-coupler would be good options.


I can see that it is missing the makers label lower centre that looks like this:

I could reproduce it, but I would rather find an original part.   Does anyone know where I might find this part?
Large Station, Airport, Factory Wall Flip Clock by
              Gino Valle for Solari Udine In Excellent Condition In
              Vienna, ATLarge Station, Airport, Factory
              Wall Flip Clock by Gino Valle for Solari Udine In
              Excellent Condition In Vienna, AT

Regards

Darren Conway
New Zealand


On 5.01.21 12:55 pm, Tracy and Raymond van Orsoy de Flines wrote:
Best is to use a relay. I got a Gents masterclock (Hipp Toggle) and run the 30 second slave clocks through a relay.

On Tue, 5 Jan 2021, 12:50 Darren Conway <darren.conway@...> wrote:

Hi

I now have 1 Master and 2 Slaves running from a 12V supply.  There is enough resistance to limit the current to within spec (~240mA).

I am seeing arcing across the Master clock contacts.    This can't be good.

Is there a standard solution to this problem?  If not, I would add an RC snubber between the top terminal and the cast iron frame from the back.


Regards

Darren Conway




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Re: Master Clock contact spark quenching

neil
 

Hi Darren,
             Raymond is correct ...the clock contacts are only rated to drive the old post office 2000 series relays, which pull little current, and the slaves are driven by the relay. I also have a gents po36 hipp toggle clock and I operate the slaves via a small Philips relay inside the clock, so the clock contacts only see the relay current. If you like I can post you a suitable relay if you tell me what voltage you are running.
Neil

On Tue, 5 Jan 2021, 12:55 pm Tracy and Raymond van Orsoy de Flines, <raytray.van@...> wrote:
Best is to use a relay. I got a Gents masterclock (Hipp Toggle) and run the 30 second slave clocks through a relay.

On Tue, 5 Jan 2021, 12:50 Darren Conway <darren.conway@...> wrote:

Hi

I now have 1 Master and 2 Slaves running from a 12V supply.  There is enough resistance to limit the current to within spec (~240mA).

I am seeing arcing across the Master clock contacts.    This can't be good.

Is there a standard solution to this problem?  If not, I would add an RC snubber between the top terminal and the cast iron frame from the back.


Regards

Darren Conway




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Re: Master Clock contact spark quenching

Tracy and Raymond van Orsoy de Flines
 

Best is to use a relay. I got a Gents masterclock (Hipp Toggle) and run the 30 second slave clocks through a relay.


On Tue, 5 Jan 2021, 12:50 Darren Conway <darren.conway@...> wrote:

Hi

I now have 1 Master and 2 Slaves running from a 12V supply.  There is enough resistance to limit the current to within spec (~240mA).

I am seeing arcing across the Master clock contacts.    This can't be good.

Is there a standard solution to this problem?  If not, I would add an RC snubber between the top terminal and the cast iron frame from the back.


Regards

Darren Conway




Avast logo

This email has been checked for viruses by Avast antivirus software.
www.avast.com


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