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Re: Where are you located?
Walter Kucharski
Wally in Montreal,Quebec, A heavy 10 in my home shop. Add to the map please.
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Re: A question about motors
william B. Mispel
Hi Nelson
toggle quoted messageShow quoted text
A few pix. I have no idea of what you have for a motor or controls. DC voltage think has to be compatable with your motor/control. Mine is 90 v from a tread mill and I got the control from Surplus Center item 11-2269. Bruce
On 12/5/2013 10:46 AM, Nelson Collar
wrote:
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Re: A question about motors
Walter Kucharski
Regarding DC motors I bought a 1 hp 90 volt brushed DC motor from fleabay. To control it I found also on fleabay a dc controller rated at 1 hp at 110volt input or 2 hp at 220 Volt. To set the speed it has a potentiometer from 0 to top speed. This was attached to a lathe that was missing its drive unit so I machined a V pulley that matched the one on the headstock spindle and made a 1 to 1 ratio with a link belt. It works beautifully and has plenty of power I just had to add a power cord and a on/off/reverse switch. Total cost about $200. Canadian. Porsche driver
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Re: A question about motors
soupy1951ca
I'd love to see the conversion. I have been contemplating this also. It beats a treadle and my 1/8 HP legs!! LOL Mike from Canada On Thu, Dec 5, 2013 at 10:26 AM, Bruce <misltoe2@...> wrote:
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Re: A question about motors
Bruce
toggle quoted messageShow quoted text
I would like to have a look see at that. I have a 2 1/2 hp and anticipate converting. Nelson Collar --------------------------------------------
On Thu, 12/5/13, Bruce <misltoe2@ne.rr.com> wrote:
Subject: Re: [SOUTHBENDLATHE] A question about motors To: SOUTHBENDLATHE@yahoogroups.com Date: Thursday, December 5, 2013, 3:26 PM Hi Brian, Works just fine. Converted mine a few years ago. Cost about $100.00 , You need , Controller Fan Switches And a box from radio shack for all the above. Most of which you can get from Surplus Supply Email me for pix. Bruce On 12/4/2013 10:19 AM, Brian Geffre wrote: I have heard that a person can convert an old tread mill motor into a variable speed motor for a lathe. Has anyone done this? I would like to know what problems might arise. Does a 2hp DC motor from a tread mill have the same umph as other motors? How slow can I run the motor and still get real work done? I am just wondering if it is worth the time and effort. Brian Glyndon MN Confidentiality Notice: This e-mail message and any attachments are for the sole use of the intended recipient and may contain confidential and privileged information. Any unauthorized review, use, disclosure, distribution or copying is prohibited. If you are not the intended recipient, please contact the sender by replying to this e-mail and destroy/delete all copies of this e-mail message.
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Re: A question about motors
william B. Mispel
Hi Brian,
toggle quoted messageShow quoted text
Works just fine. Converted mine a few years ago. Cost about $100.00 , You need , Controller Fan Switches And a box from radio shack for all the above. Most of which you can get from Surplus Supply Email me for pix. Bruce
On 12/4/2013 10:19 AM, Brian Geffre
wrote:
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Re: A question about motors
Terry Williamson
From: Jim B. ; To: ; Subject: RE: [SOUTHBENDLATHE] A question about motors Sent: Wed, Dec 4, 2013 6:09:11 PM
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Re: A question about motors
Terry Williamson
From: Brian Geffre ; To: southbendlathe@... ; Subject: [SOUTHBENDLATHE] A question about motors Sent: Wed, Dec 4, 2013 3:19:44 PM
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Re: Where are you located?
Erik
Hello Bill, This is Erik in Cheyenne WY and I have a 1928 South Bend 8" lathe. It is just a fun little lathe. I would let you add me to the map. Thanks
On Wednesday, December 4, 2013 11:37 AM, "blibecap@..." wrote: just a reminder
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Re: A question about motors
Paolo Amedeo
There are different designs of DC motors as well (one of which
closely resembles 3ph motors), therefore it is impossible to
generalize. However, most of the DC motors have the great advantage
of providing high torque at low RPM, whereas controlling a 3ph motor
with a VFD results into proportionally-reduced power at frequencies
lower than the nominal frequency of the motor. VFD have built-in
protections, limiting current to the motor. Therefore, even at
higher than rated frequency, the maximum output is very close to the
nominal output of the 3ph motor.
toggle quoted messageShow quoted text
In general, motors with wound rotor and brushes (both AC and DC) have extremely good torque characteristics at low speeds and their speed can be controlled varying the current. That's the reason why your hand drill is powered by such kind of motors and not an induction motor. I don't know if there would be any need of high torque at start-up in a treadmill, therefore, I cannot guarantee that any treadmill motor would have such characteristics. Most of the DC motor controllers monitor and limit the current delivered to the motor (and consequently the torque) and that's the reason many people have the impression that such motors are rather weak. Paolo
On 12/04/2013 02:28 PM,
913fred@... wrote:
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Re: lead screw heavy. and work shops.
john kling
At the moment there seem to be more heavy 10 screws available.
From: Nelson Collar To: SOUTHBENDLATHE@... Sent: Wednesday, December 4, 2013 1:55 PM Subject: Re: [SOUTHBENDLATHE] lead screw heavy. and work shops. It could be cheaper to buy an "A or B" screw.
Nelson Collar -------------------------------------------- On Wed, 12/4/13, Gregg Eshelman wrote: Subject: Re: [SOUTHBENDLATHE] lead screw heavy. and work shops. To: SOUTHBENDLATHE@... Date: Wednesday, December 4, 2013, 6:17 AM On 12/3/2013 2:20 PM, john kling wrote: > > > I am converting a c to an a. It has a 3 foot bed. I bought a lead screw > on Ebay. I asked the seller if it was sloted. He said yes. Apparently he > was referring to a keyway and not to the near end to end slot needed for > an A or B. My plan was to go from C to B. I have now purchased a gear > box. I now have many (complete set of) change gears that were acquired a > few at a time (not a wise strategy). Find a shop with a big horizontal mill and have a keyway cut the length of your leadscrew to convert it from the B type to the A type.
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Re: A question about motors
fwhite913
VFD and Variable Speed DC motors are constant torque designs. Pulley, gear speed reductions, etc are constant horsepower. Simply using a VFD or DC controller probably won't work....you still need step pulleys, etc. On a treadmill motor, check the motor HP and the speed at which that HP is rated- you may find the treadmill motor has much lower torque at speeds you want to run the lathe at.
Best plan is a slightly oversized motor rated at 1750-1800rpm with a VFD or DC drive ( depending on the motor ).Then continue to use the lathe step pulleys for coarse speed adjustment and the VS drive for fine speed adjustment.
I once heard of a person trying to use a 7.5HP 3 phase motor with a VFD on a Clausing lathe ( originally 1 1/2 or 2 HP ) so he could eliminate step pulleys. Neaver heard how that turned out......
There has been much discussion on this subject over the past years on "www.practicalmachinist.com
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Re: A question about motors
Thomas G Brandl
Ed,
I bought a place or more like acreage in WV last month. I was cleaning out clothes and other stuff. I came across an old sewing machine. It was a Brothers. It was like the old black Singers, electric motor. I was at the local Catholic charities. I ask the woman about donating the clothes and if anyone wanted a sewing machine. I told her what it was. She pointed to herself. She wanted it for quilts. Most of the new ones don't hold up, according to her. She did offer money, but I was happy to give it away. She does donate quilts for local raffles. I did talk to my mom. She does some quilts and other sewing. Her Berdina does fine on quilts. Don't know what one cost though. Tom From: Ed S <eschwerkolt@...> To: SOUTHBENDLATHE@... Date: 12/04/2013 01:43 PM Subject: Re: [SOUTHBENDLATHE] A question about motors Sent by: SOUTHBENDLATHE@... My old Singer (1940 model 16, AC brush motor, 1/8 hp) sewing
machine
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Re: lead screw heavy. and work shops.
It could be cheaper to buy an "A or B" screw.
toggle quoted messageShow quoted text
Nelson Collar --------------------------------------------
On Wed, 12/4/13, Gregg Eshelman <g_alan_e@YAHOO.COM> wrote:
Subject: Re: [SOUTHBENDLATHE] lead screw heavy. and work shops. To: SOUTHBENDLATHE@yahoogroups.com Date: Wednesday, December 4, 2013, 6:17 AM On 12/3/2013 2:20 PM, john kling wrote: > > > I am converting a c to an a. It has a 3 foot bed. I bought a lead screw > on Ebay. I asked the seller if it was sloted. He said yes. Apparently he > was referring to a keyway and not to the near end to end slot needed for > an A or B. My plan was to go from C to B. I have now purchased a gear > box. I now have many (complete set of) change gears that were acquired a > few at a time (not a wise strategy). Find a shop with a big horizontal mill and have a keyway cut the length of your leadscrew to convert it from the B type to the A type.
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Re: A question about motors
Flash Gordon
My old Singer (1940 model 16, AC brush motor, 1/8 hp) sewing machine has a foot pedal for speed. But it gets hot (carbon pile) as you use it. I do not think you would want to run a large motor that way. I did buy a new electronic version, I don't think it gets as hot; has better speed control.
Yes guys I sew.... vinyl seat covers and canvas boat cover... my wife would not let me use her good machine. But this singer will sew through a cow. Ed S
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Re: Where are you located?
Hi Everyone I have created this map. If you care to put your appropriate location on it, it may be easier to find people. Please do not put you exact street address on the map. https://www.zeemaps.com/South_Bend_Lathe_Owners_Map Bill in Cincy oh
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Re: OT: The good old days - Barnes treadle lathe in action
Nick Jonkman
Here is a picture of my 18" swing Barnes. Still using it all the
time..
toggle quoted messageShow quoted text
Nick
On 04/12/13 10:29 AM, m. allan noah wrote:
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Re: A question about motors
john kling
I am almost certain that the rheostat was on a 220 single phase set up.
From: "Thomas.G.Brandl@..." To: SOUTHBENDLATHE@... Sent: Wednesday, December 4, 2013 1:19 PM Subject: RE: [SOUTHBENDLATHE] A question about motors I was
wondering. We had a smaller Bridgeport mill, that was sent out for a rebuild.
It came back with a 'rheostat' to vary the RPMs of the motor. Others in
the shop didn't like it. Others just didn't like the mill, as no power
feeds and no power draw bar. I liked it as no one else used it. So, it
didn't do a bunch of fly cutting with insert tooling etc. Basically, it
stayed in good shape. Unfortunately, that was one of the mills that went
out the door. I found the knob easier to use than the dial on the J heads.
Tom From: "Jim B. " <btdtrf@...> To: SOUTHBENDLATHE@... Date: 12/04/2013 01:11 PM Subject: RE: [SOUTHBENDLATHE] A question about motors Sent by: SOUTHBENDLATHE@... I should have been a
bit more specific.
The previous post is
true for synchronous motors.
A universal wound motor,
the kind with brushes, can use a rheostat.
Jim B.
This email has been scanned for Malware. ______________________________________________________________________
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Re: A question about motors
john kling
My father had a photograph dryer ( a big canvas belt on it) with a rheostat to vary the speed. I was under the impression that power (like horse power) was reduced as the speed was cut.
From: "Thomas.G.Brandl@..." To: SOUTHBENDLATHE@... Sent: Wednesday, December 4, 2013 1:19 PM Subject: RE: [SOUTHBENDLATHE] A question about motors I was
wondering. We had a smaller Bridgeport mill, that was sent out for a rebuild.
It came back with a 'rheostat' to vary the RPMs of the motor. Others in
the shop didn't like it. Others just didn't like the mill, as no power
feeds and no power draw bar. I liked it as no one else used it. So, it
didn't do a bunch of fly cutting with insert tooling etc. Basically, it
stayed in good shape. Unfortunately, that was one of the mills that went
out the door. I found the knob easier to use than the dial on the J heads.
Tom From: "Jim B. " To: SOUTHBENDLATHE@... Date: 12/04/2013 01:11 PM Subject: RE: [SOUTHBENDLATHE] A question about motors Sent by: SOUTHBENDLATHE@... I should have been a
bit more specific.
The previous post is
true for synchronous motors.
A universal wound motor,
the kind with brushes, can use a rheostat.
Jim B.
This email has been scanned for Malware. ______________________________________________________________________
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Re: Where are you located?
just a reminder
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