Date   

Re: PC Turn 50 Headstock Alignment

David Rabenius
 

To test spindle runout remove the chuck and using a Dial Indicator place the tip in the taper and gently turn by hand on the back of the spindle. Mount the indicator on the bed, its the most rigid part of the machine. This will give you the runout of the spindle, place the tip on the face and also check the face runout. these should be way under .001 runout
To test the runout of the chuck do as above. I am assuming that you have the precision 3 jaw chuck that has the square chuck key. The other cheaper chuck used a Jacobs drill key, I had one of these and it runout quite a bit. The precision 3 jaw I have now is less than .001 runout. The standard is usually measured at 1 inch from the chuck.
   If you have part taper then your tailstock may also be out of alignment. You can buy a ground steel Lathe mandrel that has a center on each end. I have one of these, bought years ago from ENCO, you must use a center in the spindle and one in the tailstock. Chucks do wear with use. The jaws can also have taper. Has the lathe been crashed? That could also be a problem. 
Sometimes gunk gets trapped under the tailstock, I would remove it and check the bottom for gunk. At that time I would also polish the bed. Are there any dings on the ways?, if so use a fine stone to remove them.
  My PCturn50 typically has less than .0005 on parts that are 6 inches long, I use a live center to support the part. If you have bench centers you can also use indicators to check the roundness of your parts, if you have roundness issues it will show.
  I worked at a precision shop where the 18 inch swing Mori-Seiki Manual lathe had bearing issues and ran out .002, the lathe had seen heavy use and was removed for rebuilding. 

Dave

On Sunday, June 7, 2020, 11:14:26 AM EDT, rcflyer <sclcl082@...> wrote:


There are many variables which can cause taper in a turned part. To test spindle runout, chuck drill rod or similar and indicate from the tool post.

On Sat, Jun 6, 2020 at 11:56 PM David Rabenius via groups.io <swedeson2002=yahoo.com@groups.io> wrote:
Mark:
  The reason why you have a taper is because the material is sticking out 2 inches. The material is springing away from the tool. As you get closer to the headstock the material doesn't deflect like at the 2.0 inch mark. You didn't mention the diameter of the material or the finished dia. of the part. Tool & billet deflection is common.
  These Lathes are very accurate and you also didn't mention if you have a center into the end of the part. You may need to spot drill and use either a live center or dead center held in the tailstock. Do you have a Live Center or dead Center?? This would help eliminate the taper you are experiencing.

Dave

On Saturday, June 6, 2020, 09:25:30 PM EDT, mmcdade@... <mmcdade@...> wrote:


Hi All,

 

I use a PC 50 lathe which turns a slight taper (wider by 0.0018" at 2" out from the headstock).  Is there a way to adjust the headstock?  I took the cover off and the prismatic shape of the front way is built into the headstock so that's not obviously adjustable short of scraping.  I tried shimming the far end of the bed like you would level to adjust twist in the bed of a conventional floor mounted horizontal engine lathe.  That didn't change anything and I suspect it just slightly deformed the sheet metal holding the bed.  Any ideas on this?  I admit that the error is pretty small but I sometimes make little optical mounts that slide together and they and I are happier when things are cylindrical.

 

Thanks,

 

Mark

 


Re: PC Turn 50 Headstock Alignment

rcflyer
 

There are many variables which can cause taper in a turned part. To test spindle runout, chuck drill rod or similar and indicate from the tool post.

On Sat, Jun 6, 2020 at 11:56 PM David Rabenius via groups.io <swedeson2002=yahoo.com@groups.io> wrote:
Mark:
  The reason why you have a taper is because the material is sticking out 2 inches. The material is springing away from the tool. As you get closer to the headstock the material doesn't deflect like at the 2.0 inch mark. You didn't mention the diameter of the material or the finished dia. of the part. Tool & billet deflection is common.
  These Lathes are very accurate and you also didn't mention if you have a center into the end of the part. You may need to spot drill and use either a live center or dead center held in the tailstock. Do you have a Live Center or dead Center?? This would help eliminate the taper you are experiencing.

Dave

On Saturday, June 6, 2020, 09:25:30 PM EDT, mmcdade@... <mmcdade@...> wrote:


Hi All,

 

I use a PC 50 lathe which turns a slight taper (wider by 0.0018" at 2" out from the headstock).  Is there a way to adjust the headstock?  I took the cover off and the prismatic shape of the front way is built into the headstock so that's not obviously adjustable short of scraping.  I tried shimming the far end of the bed like you would level to adjust twist in the bed of a conventional floor mounted horizontal engine lathe.  That didn't change anything and I suspect it just slightly deformed the sheet metal holding the bed.  Any ideas on this?  I admit that the error is pretty small but I sometimes make little optical mounts that slide together and they and I are happier when things are cylindrical.

 

Thanks,

 

Mark

 


Re: PC Turn 55 - Info for a newbie

TimG
 
Edited

John,
Thank you for sharing your successful experience with the Centroid controller, it's a welcome plan B.
The tool changer controller is of particular interest in that conversion, as Marty asks, it is interesting to know whether you retained the Emco TC controller?

J G,
Thank you for your advice on the potentially degraded capacitor; you have given me motivation to take a look and inspect rather than conclude that all is lost and move on.  I now appreciate that having the PC expansion RS422 card and (mostly) working software is a fortunate starting point (there was an error message hanging around, then the smoking board excitement).
The axis controller is made of 3 parts (large PCB, small biggy-back PCB and the top connections panel); it was the small PCB that looked like the source of the smoke, does this small board have a particular function?

Do you know whether there is a WinCAM licence within the software installation?  I'm a bit concerned over the long term viability of the old Win98 PC and wonder whether I can install WinCAM on a newer PC?  I've read messages on the subject of trying to create an image of the hard-drive so maybe this is a pointer to new installation not possible.

Many thanks for all info


Re: PC Turn 55 - Info for a newbie

J G
 

There is a fair chance that (esp if the smoke was short lived and accompanied by an acrid smell) one of the aging capacitors has expired - a very common problem on electronics of this vintage. It is good practice to replace certain type of caps in the low voltage power circuits as a matter of course. I did half a dozen on my Compact5 - after a couple gave up dramatically.
So, your problem may be easily diagnosable by close visual inspection of the board. If this is the case it often does not cause serious follow on damage to other components and it is generally worth trying a replacement (can be hard identifying the value from the burnt fragments ! ) after basic checking round for collateral damage.
Obv - you need basic skills (elec measurement, soldering, awareness etc) for this and should take care - of course.
JG


Re: Fanuc 0T and 0M WinNC software?

Constantine Christophi
 

So I've managed to install everything I need except I need the machine data disk. Emco haven't responded to any of my recent emails. Is there another way to get hold of this?
Thanks!


Re: PC Turn 50 Headstock Alignment

David Rabenius
 

Mark:
  The reason why you have a taper is because the material is sticking out 2 inches. The material is springing away from the tool. As you get closer to the headstock the material doesn't deflect like at the 2.0 inch mark. You didn't mention the diameter of the material or the finished dia. of the part. Tool & billet deflection is common.
  These Lathes are very accurate and you also didn't mention if you have a center into the end of the part. You may need to spot drill and use either a live center or dead center held in the tailstock. Do you have a Live Center or dead Center?? This would help eliminate the taper you are experiencing.

Dave

On Saturday, June 6, 2020, 09:25:30 PM EDT, mmcdade@... <mmcdade@...> wrote:


Hi All,

 

I use a PC 50 lathe which turns a slight taper (wider by 0.0018" at 2" out from the headstock).  Is there a way to adjust the headstock?  I took the cover off and the prismatic shape of the front way is built into the headstock so that's not obviously adjustable short of scraping.  I tried shimming the far end of the bed like you would level to adjust twist in the bed of a conventional floor mounted horizontal engine lathe.  That didn't change anything and I suspect it just slightly deformed the sheet metal holding the bed.  Any ideas on this?  I admit that the error is pretty small but I sometimes make little optical mounts that slide together and they and I are happier when things are cylindrical.

 

Thanks,

 

Mark

 


Re: FOR SALE: I have a PC 125 Mill complete that I would like to sell.

 

Hi Kevin. I'm interested. My lathe needs a friend.

Can you email me directly?

Thanks

cscardinal AT live DOT com


ISO: Compact 5 chuck

 

Hi folks. I'm looking for a 3 or 4 jaw chuck with reversible jaws for my new-to-me Emco Compact 5 CNC PC. I need to turn model railroad wheels up to 3.5" in diameter, and the stock non-reversible chuck can't handle it.

I found a suitable chuck in the UK, but shipping is almost the same cost as the chuck itself. I'm hoping someone might have a spare here in the states.

Thanks

Chris

 



Re: PC Turn 55 - Info for a newbie

marty_in_mesa
 

John, did you reuse the tool changer controller? 12vdc forward and 5vdc reverse?


On Sat, Jun 6, 2020, 7:03 PM John Driggers <jdriggers@...> wrote:
Tim - couple of thoughts, and welcome.  I have a '55 still runs on the original hardware / software, and it's a solid solution.  I also have one that I converted to Centroid, and it performs nicely as well, but I tend to play more with it than the OEM.  

If you decide to get yours up and running - and it sounds like if you have the PC up -  thats one of the major hurdles.   I have all the spare boards from the original except the PC card, and the tool changer controller.


Re: PC Turn 55 - Info for a newbie

John Driggers
 

Tim - couple of thoughts, and welcome.  I have a '55 still runs on the original hardware / software, and it's a solid solution.  I also have one that I converted to Centroid, and it performs nicely as well, but I tend to play more with it than the OEM.  

If you decide to get yours up and running - and it sounds like if you have the PC up -  thats one of the major hurdles.   I have all the spare boards from the original except the PC card, and the tool changer controller.


PC Turn 50 Headstock Alignment

mmcdade@...
 

Hi All,

 

I use a PC 50 lathe which turns a slight taper (wider by 0.0018" at 2" out from the headstock).  Is there a way to adjust the headstock?  I took the cover off and the prismatic shape of the front way is built into the headstock so that's not obviously adjustable short of scraping.  I tried shimming the far end of the bed like you would level to adjust twist in the bed of a conventional floor mounted horizontal engine lathe.  That didn't change anything and I suspect it just slightly deformed the sheet metal holding the bed.  Any ideas on this?  I admit that the error is pretty small but I sometimes make little optical mounts that slide together and they and I are happier when things are cylindrical.

 

Thanks,

 

Mark

 


Re: PC Turn 55 - Info for a newbie

TimG
 

Hi David,
Thank you for your insight; if I convert to a newer motion controller then I will certainly offer the PC expansion card for a spare to an Emco in need.
Tim


Re: PC Turn 55 - Info for a newbie

David Rabenius
 

Tim:
  To my knowledge the keys are all the same pin settings. I have observed this with the PCMill50, PCTurn50, PC5 to date. The key blanks are somewhat common here in the USA.  I had a few extra keys cut from longer blanks, they were longer and the locksmith simply cut the length down. You were lucky to get a complete running machine as the Colleges here in the US usually separate the Computer from the machine when they surplus the machines. Microsoft is very aggressive regarding their licensing and according to the license agreement it basically states that you are only agreeing to use the software. When the Collages surplus these machines  that cost upwards of $18,000 new don't realize that the RS485 & RS422 cards are REQUIRED to use them. Without these cards the machines are basically paperweights. Cards are no longer available and were specific to EMCO.


Re: PC Turn 55 - Info for a newbie

TimG
 

I have booted the PC ok, very surprised and strange to see Win98 again.
I don't have the key for the PCT55 but managed to turn the main power switch to on, using pliers, it turned quite easily.
The back panel is removed and many LEDs showing in the back, both red and green.  While I was checking in the WinCAM program, I noticed smoke coming from the smaller board attached to the main control board (behind the axis-controller white/orange board).

I'm now thinking about a controller upgrade rather than sourcing Emco spare parts; does anyone have experience with a Linuxcnc or other conversion of a PCT55?


PC Turn 55 - Info for a newbie

TimG
 
Edited

Hi,
I have just joined your group having brought home a 2002 PCT55-11 from an auction yesterday.  I have the old PC and CRT monitor and will give it a try today, although not holding out much hope due to long time standing unused.

I have the machine and software description books and I have downloaded the electrical description here, thank you.

Is there a licence file, code or dongle required to use the PCT55?
I appreciate the RS422 serial connection to the card installed in the PC; in what mode does the main control board in the PCT55 work, i.e. does it stand alone and receive G-code streamed from the PC over the serial connection?
The main control board doesn't seem to be mentioned in the machine and electrical description, is there another document describing it's operation and connections?
I appreciate any help in getting to know this fine looking machine.
Kind regards, Tim


Re: Fanuc 0T and 0M WinNC software?

Constantine Christophi
 

Thanks for clearing that up! I'll give that a go as soon as I've got the PC running. Currently waiting for a >66mhz processor to install Windows 98.


On Sat, 23 May 2020 at 21:02, <Emcofan31@...> wrote:
Try WinNC.rar in the files section. Should be what you need. It is the AC88 version. AC88 refers to the controller generation. The machine side of the controller is based on an 8088 Microcontroller. Later generations of control have more modern hardware.

Good Luck!


Re: Fanuc 0T and 0M WinNC software?

@Travis_S
 

Try WinNC.rar in the files section. Should be what you need. It is the AC88 version. AC88 refers to the controller generation. The machine side of the controller is based on an 8088 Microcontroller. Later generations of control have more modern hardware.

Good Luck!


Re: Fanuc 0T and 0M WinNC software?

Constantine Christophi
 

I’m not sure what you mean by AC88?

 

Sent from Mail for Windows 10

 

From: arjan.dijk
Sent: 23 May 2020 13:25
To: Emco-CNC-Users@groups.io
Subject: Re: [Emco-CNC-Users] Fanuc 0T and 0M WinNC software?

 

Are you looking for ac88? That might be hard to find. I only have wincam for that 

 

Op vr 22 mei 2020 14:00 schreef Constantine Christophi <conners@...>:

Hi

 

Does anyone have copies of WinNC Fanuc 0T and Fanuc 0M for Windows 98?

 

Emco are currently looking for me but not having a lot of luck but if they find them I’ll upload them to the files parts of this group.

 

I’ve got a PC Turn 120 and PC Mill 100, I have a copy of WinNC Fanuc 21T from that youtube video, I’m installing Windows 98 today on the Turn to see if I can get it up and running.

 

Thanks in advance!

 

 


Re: Fanuc 0T and 0M WinNC software?

arjan.dijk
 

Are you looking for ac88? That might be hard to find. I only have wincam for that 

Op vr 22 mei 2020 14:00 schreef Constantine Christophi <conners@...>:

Hi

 

Does anyone have copies of WinNC Fanuc 0T and Fanuc 0M for Windows 98?

 

Emco are currently looking for me but not having a lot of luck but if they find them I’ll upload them to the files parts of this group.

 

I’ve got a PC Turn 120 and PC Mill 100, I have a copy of WinNC Fanuc 21T from that youtube video, I’m installing Windows 98 today on the Turn to see if I can get it up and running.

 

Thanks in advance!




Re: Fanuc 0T and 0M WinNC software?

Baschwar@
 

Some software is here in the group files: 
https://groups.io/g/Emco-CNC-Users/filessearch?q=winnc