Re: [CAD_CAM_EDM_DRO] PIC DRO

If I get your drift right you are asking if the encoders are connected to a backlash prone leadscrew. If you read my orginal wish list there is no mention of a rotary encoder used in this way. This is the reason for a linear encoder mounted on the table. The reason for including a rotary encoder input to a PIC based DRO is to allow the use of a rotary table or to use a rotary encoder connected to the table via a steel wire tensioned by a spring. The problems with this sort of arrangement is to pay out and recover the steel wire in a repeatable way. I could draw this type of system but cannot post the drawings on this list and I have little use for it because of the engineering problems and the cheaper alternative of a linear encoder.

Regards,

Terry.

----- Original Message -----
From: Bryan Mumford
To: CAD_CAM_EDM_DRO@egroups.com
Sent: Tuesday, April 04, 2000 8:07 PM
Subject: Re: [CAD_CAM_EDM_DRO] PIC DRO


It seems like the problem will be how to couple to everyone's shafts.
What would you use for a shaft encoder that would be somewhat
universal? There may be no way to fit full size machines as well as
tabletop machines. Also, a shaft encoder cannot manage the backlash,
so your resolution will be no better than the current lash in the
lead screw, right?


Bryan Mumford
Santa Barbara, California
http://www.bmumford.com

------------------------------------------------------------------------------



------------------------------------------------------------------------------
Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems in the above catagories.
To Unsubscribe, read archives, change to or from digest.
Go to: http://www.onelist.com/isregistered.cgi
Log on, and you will go to Member Center, and you can make changes there.
For the FAQ, go to http://www.ktmarketing.com/faq.html
bill,
List Manager



[Non-text portions of this message have been removed]