Re: [CAD_CAM_EDM_DRO] newbie needs advice

Hey Chuck, If your using original acme screws, how did you get rid of the
backlash?

Smoke

>I don't know the specifics but I do know that with ball screws you need

more

>torque to prevent the cutting forces from driving (i.e.: turning) the
>stepper off position. I don't have this problem on my mill because I'm
>using the original Acme screws that have enough friction loss that the

table

>does not shift. On the other hand I have to use a higher drive ratio to
>overcome the friction so I pay for it with lower speeds - but this is a
>hobby so I'm willing to trade off speed ....
>
>Regards,
>
>Chuck Hackett
>
> -----Original Message-----
>From: John Hudak [mailto:jh1221@...]
>Sent: Tuesday, December 26, 2000 11:00 AM
>To: CAD_CAM_EDM_DRO@egroups.com
>Subject: [CAD_CAM_EDM_DRO] newbie needs advice
>
>Hello, I am in the process of converting my bridgeport mill to cnc
>control, and have already purchased the ballscrews, and the drivers
>(gecko) at this point I am looking at the motors, and am a little
>confused about the sizes that might be needed, I have seen some
>conversion kits with 1200 oz motors that are reduced 2 times. Does
>this give 2400ozs of force??? what is the minimum size motor that I
>should use? I plan on using this mill for hobby work with a small
>cash job thrown in here and there. Thanks; John
>
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
>discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
>Addresses:
>Post message: CAD_CAM_EDM_DRO@egroups.com
>Subscribe: CAD_CAM_EDM_DRO-subscribe@egroups.com
>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@egroups.com
>List owner: CAD_CAM_EDM_DRO-owner@egroups.com, wanliker@...
>Moderator: jmelson@... [Moderator]
>URL to this page: http://www.egroups.com/group/CAD_CAM_EDM_DRO
>FAQ: http://www.ktmarketing.com/faq.html
>bill,
>List Manager
>
>
>[Non-text portions of this message have been removed]
>
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

>
>Addresses:
>Post message: CAD_CAM_EDM_DRO@egroups.com
>Subscribe: CAD_CAM_EDM_DRO-subscribe@egroups.com
>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@egroups.com
>List owner: CAD_CAM_EDM_DRO-owner@egroups.com, wanliker@...
>Moderator: jmelson@... [Moderator]
>URL to this page: http://www.egroups.com/group/CAD_CAM_EDM_DRO
>FAQ: http://www.ktmarketing.com/faq.html
>bill,
>List Manager
>
>
>