Re: [CAD_CAM_EDM_DRO] Re: Turning Spindle Off and On

turbulatordude <dave_mucha@...> wrote:


--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers
wrote:

> Its very simple if you have Bob Campbell's Breakout board. How I

did mine: Mounted a solid state relay on the wire that operates the
motor starter contacts (the wire going to the solenoid on the motor
contacts). Then ran a pair of 22 gauge wires from the solid state
relay back to the Campbell breakout board.

This is not specif to that board. Any breakout manner, be is a
simple solder wire on the parallel cable itself or another IC in-
between. the parallel port itself should have enough to power a SSR.

I run 2N2222's and power mechanical relays. those can then handle any
voltage up to an amp for external devices.

I have a motor starter which has overload heaters and fuses for a
high current motor. The small relay in my panel handles the 110VAC
needed to pull in the starter.

The key is that you just need to assign an output pin in software and
connect it to something that can handle the load of the next device.

///What about opto-isolation? Wouldnt there be a risk of damaging the PC electronics wiring up auxillary equiptment directly to the port?

Other breakout boards have the ability to control Solid state relays however like the PMDX has no "watchdog" feature that monitors erroneous pulses from the PC (it didnt two years ago anyway and they didnt sound too concerned about changing it). Mine has tripped the software reset 3 or 4 times in the last year. What would've happened had this safety not been present? Old printer programs or something in XP try to talk to the port also evidently. It also handles the limit switches powers up the Geckos, etc. I'm going to do another machine and it will have the same Breakout board on it.

Ron






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@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner


Yahoo! Groups Links











---------------------------------
Do you Yahoo!?
Meet the all-new My Yahoo! � Try it today!

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