Re: [Emc-users] Machining a servo motor shaft.

[Dave Cole]

I had to cut down a stepper motor shaft from 1/2" to a little less than 
3/8" to fit an encoder.
The motor had 1/2" shafts on both ends.
The motor was a nema 34 with flying leads.   I taped the leads to the 
body of the motor.
I chucked the 1/2" shaft I did not want to machine in the 3 jaw chuck.
I supported the other end of the shaft with a live center and used a 
very narrow tool (modified cutoff) to turn
down the shaft at the live center end.It worked fine.The motor 
case spun a little with the shaft but I could have used some tape to 
keep it from rotating.

The other thing I thought about afterwards was using the motor itself to 
power the shaft that is being turned down.   Clamp the servo motor to 
the ways and run the carriage and tooling up the the motor shaft while 
the motor spins via its own drive.

If you just want to cut the shaft off, putting a hacksaw against a 
spinning shaft will make quick work of it.

Dave


On 9/7/2015 6:09 AM, andy pugh wrote:
> I have a motor that would be about right for my lathe conversion, if
> it didn't have a brake on the back. (a nice short motor is useful for
> a Lathe X axis).
>
> I am considering re-machining the rotor shaft and the end cover to
> make it into a shorter motor without a brake.
>
> The problem, clearly, will be that all the swarf will want to stick to
> the magnet. My idea is to wrap it in masking tape and then duct tape,
> do the machining, add another layer of duct-tape to immobilise any
> remaining swarf, then cut it all off.
>
> Does anyone have a better idea?
>

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[andy pugh]

On 8 September 2015 at 14:45, Dave Cole  wrote:
> I chucked the 1/2" shaft I did not want to machine in the 3 jaw chuck.
> I supported the other end of the shaft with a live center

Unfortunately the part of the shaft I want to modify is inside the motor.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[Dave Cole]

On 9/8/2015 9:37 AM, andy pugh wrote:
> On 8 September 2015 at 14:45, Dave Cole  wrote:
>> I chucked the 1/2" shaft I did not want to machine in the 3 jaw chuck.
>> I supported the other end of the shaft with a live center
> Unfortunately the part of the shaft I want to modify is inside the motor.
Oh..
In that case I guess that plastic/plastic wrap, duct tape, sealant and 
wire ties are your best option.

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[Gene Heskett]

On Monday 07 September 2015 06:09:42 andy pugh wrote:

> I have a motor that would be about right for my lathe conversion, if
> it didn't have a brake on the back. (a nice short motor is useful for
> a Lathe X axis).
>
> I am considering re-machining the rotor shaft and the end cover to
> make it into a shorter motor without a brake.
>
> The problem, clearly, will be that all the swarf will want to stick to
> the magnet. My idea is to wrap it in masking tape and then duct tape,
> do the machining, add another layer of duct-tape to immobilise any
> remaining swarf, then cut it all off.
>
> Does anyone have a better idea?

If the brake can be removed but leave the shaft, it would make a great 
place to put a damper on it.  Not that x normally needs the speed 
because of the short travel range, but...

And I  can't think of a better way to keep the swarf out of it than what 
you are describing.  I'd likely do the same.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[rayj]

Someone mentioned using modelling clay for removing chips from magnets 
on this list earlier.

I was thinking: Wrap it with cling wrap or maybe cover it with grease so 
the clay doesn't adhere and then cover it with clay.  When finished, 
press all the swarf firmly into the clay and then remove the clay.

Now that I've finished, I realize that the clay would probably get 
thrown off during the turning, but maybe the idea will lead to another 
solution.

Back to lurking.

Raymond Julian
Kettle River, MN

The things we admire in men, kindness and generosity, openness, honesty, 
understanding and feeling are the concomitants of failure in our system. 
And those traits we detest, sharpness, greed, acquisitiveness, meanness, 
egotism and self-interest are the traits of success. And while men 
admire the quality of the first they love the produce of the second. 
-John Steinbeck, novelist, Nobel laureate (1902-1968)

On 09/07/2015 05:09 AM, andy pugh wrote:
> I have a motor that would be about right for my lathe conversion, if
> it didn't have a brake on the back. (a nice short motor is useful for
> a Lathe X axis).
>
> I am considering re-machining the rotor shaft and the end cover to
> make it into a shorter motor without a brake.
>
> The problem, clearly, will be that all the swarf will want to stick to
> the magnet. My idea is to wrap it in masking tape and then duct tape,
> do the machining, add another layer of duct-tape to immobilise any
> remaining swarf, then cut it all off.
>
> Does anyone have a better idea?
>

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[Jason Burton]

Assuming the bearings come off, maybe dip the end you are machining in hot
paraffin? After it sets up it should make a fair chip dam.

On Mon, Sep 7, 2015 at 11:56 AM, rayj  wrote:

> Someone mentioned using modelling clay for removing chips from magnets
> on this list earlier.
>
> I was thinking: Wrap it with cling wrap or maybe cover it with grease so
> the clay doesn't adhere and then cover it with clay.  When finished,
> press all the swarf firmly into the clay and then remove the clay.
>
> Now that I've finished, I realize that the clay would probably get
> thrown off during the turning, but maybe the idea will lead to another
> solution.
>
> Back to lurking.
>
> Raymond Julian
> Kettle River, MN
>
> The things we admire in men, kindness and generosity, openness, honesty,
> understanding and feeling are the concomitants of failure in our system.
> And those traits we detest, sharpness, greed, acquisitiveness, meanness,
> egotism and self-interest are the traits of success. And while men
> admire the quality of the first they love the produce of the second.
> -John Steinbeck, novelist, Nobel laureate (1902-1968)
>
> On 09/07/2015 05:09 AM, andy pugh wrote:
> > I have a motor that would be about right for my lathe conversion, if
> > it didn't have a brake on the back. (a nice short motor is useful for
> > a Lathe X axis).
> >
> > I am considering re-machining the rotor shaft and the end cover to
> > make it into a shorter motor without a brake.
> >
> > The problem, clearly, will be that all the swarf will want to stick to
> > the magnet. My idea is to wrap it in masking tape and then duct tape,
> > do the machining, add another layer of duct-tape to immobilise any
> > remaining swarf, then cut it all off.
> >
> > Does anyone have a better idea?
> >
>
>
> --
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Machining a servo motor shaft.

[john mcintyre]

Good day
I usually if possible wrap the shaft in a heavy plastic sheet first, as the 
adhesive tends to cling to the 
swarf ,then wrap duct-tape over the lot.
Regards john
 
> From: bodge...@gmail.com
> Date: Mon, 7 Sep 2015 11:09:42 +0100
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Machining a servo motor shaft.
> 
> I have a motor that would be about right for my lathe conversion, if
> it didn't have a brake on the back. (a nice short motor is useful for
> a Lathe X axis).
> 
> I am considering re-machining the rotor shaft and the end cover to
> make it into a shorter motor without a brake.
> 
> The problem, clearly, will be that all the swarf will want to stick to
> the magnet. My idea is to wrap it in masking tape and then duct tape,
> do the machining, add another layer of duct-tape to immobilise any
> remaining swarf, then cut it all off.
> 
> Does anyone have a better idea?
> 
> -- 
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
> 
> --
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
  
--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users