RE: [CAD_CAM_EDM_DRO] Limit switch options - opinion

There are also proximity switches that can sense metal directly without
magnets. Some of these can be quite small. I'd be careful of reed switches
for a homing function, as they may not be too repeatable.

For both limit and homing switches, make sure that there is a clear path for
overtravel in the situation where something fails and the motor keeps
wanting to drive the carriage past the limit. With larger systems than a
sherline, if the switch gets in the way of the carriage travel, you'll wipe
out the switch and do the same damage to the carriage as if the switch
weren't there anyway. With a Sherline, Chances are that the motor would
stall out if you hit the switch, though you may also breake something there.

-- Jerry

|-----Original Message-----
|From: mszollar [mailto:mszollar@...]
|Sent: Monday, December 17, 2001 7:30 PM
|To: CAD_CAM_EDM_DRO@yahoogroups.com
|Subject: [CAD_CAM_EDM_DRO] Limit switch options - opinion
|
|
|I just finished building the better part of my CNC system (conversion
|of a Sherline mill) and am moving onto the limit and home switched.
|There are many options available and I'm curious as to what different
|persons are using. I see 2 options; a mechanical limit switch (the
|little ones with a spring loaded bat)and a magnetic one (I'd drill
|and implant a small magnet into the base, place the pickups along the
|travel path).
|
|Any other ideas; opinions?
|
|Anyone have pictures of how you fitted your sherline (or simular)
|mill with limit and home switches?
|
|Thanks,
|Ken
|
|
|
|Addresses:
|FAQ: http://www.ktmarketing.com/faq.html
|FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|
|Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
|Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
|Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
|List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
|Moderator: jmelson@... timg@... [Moderator]
|URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
|bill,
|List Manager
|
|
|
|Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
|
|
|