Re: [CAD_CAM_EDM_DRO] Re: ball screw conversion

I think he meant homeshopcnc.com

You can also mount the handwheels to your pulleys. Unless you provide a way to remove the belts or make one of the pulleys freewheel, you will get cogging from the steppers when using your handwheel, go fast enough and the stepper will suddenly try to brake your handwheel motion. Rather annoying IMO.

You will find you don't need the handwheels at all. People told me this and I didn't listen.Using a pendant jog stick or even the keyboard is much better than hand turning the wheels, it's like having a perfect power feed in all directions.

You really will never use the handwheels- even for picking up a center.

My .02
-Will

----- Original Message -----
From: Bryan Mumford
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Thursday, December 03, 2009 11:44 AM
Subject: RE: [CAD_CAM_EDM_DRO] Re: ball screw conversion



I already have single-ended 42 frame motors attached by toothed belts
and pulleys.

The link http://www.homeshopcncn.com does not appear to be valid.

http://www.homeshopcn.com is something else entirely.

It seems odd that I've been able to find a company that makes it easy
for amateurs to do this conversion. Maybe it's less commonly done
than I imagine.

-Bryan

At 10:23 AM -0600 12-3-09, Bob Campbell wrote:
>Bryan,
>
>You can use a stepper motor with a double shaft. You then can put a knob or
>crank on the shaft.
>
>Please look at www.homeshopcncn.com for ball screws that have machined ends.
>
>Bob Campbell
>Bob Campbell Designs.com
>www.campbelldesigns.com
>Breakout boards
>USB Pendants
>Electrical Enclosures
>
>-----Original Message-----
>From: CAD_CAM_EDM_DRO@yahoogroups.com
>[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Bryan Mumford
>Sent: Thursday, December 03, 2009 9:53 AM
>To: CAD_CAM_EDM_DRO@yahoogroups.com
>Subject: RE: [CAD_CAM_EDM_DRO] Re: ball screw conversion
>
>I don't know what this means. I'm only aware of kits from places like
>Hiwin and Rockford. Are these what you mean by "ready made"?
>
>I can't see any description of how to install them at the Hiwin web site.
>
>Also, a friend of mine said ball screws would eliminate my hand
>cranks. I often rely on manual operation and would not want to give
>them up. Must a ball screw conversion always eliminate hand cranks?
>
>-Bryan
>
>At 1:06 AM +0000 11-27-09, fortino tan wrote:
>>Unless you have experiences how to set them straight for each axis
>>and align them perpendicularly, I suggest
>>buying them ready made will cut off all the hazzles along the road.
>>
>>fortino
>>
>>
>> Thanks. What I want to know is how hard it is to install them,
>>and if I'm going to end up with a broken machine instead.
>>
>>
>> > hiwin does have ready to install X-Y ballscrew for manual
> >retrofit. Check this link : http://hiwin.com/html/bs/xy.html






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