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Author Topic: shutdowm problem  (Read 2914 times)

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shutdowm problem
« on: December 28, 2009, 02:58:59 PM »
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if i shutdown my computer before i shutdown the controller
i get a loud thump and the x axis lurch forward about 1/2 inch. i do not have this problem if i shutdown the controller
then the computer
definitely a problem there.
I am running mach 3 on a shopbot this is a home built controller
now setting it up for the first time.
thanks paul
Re: shutdowm problem
« Reply #1 on: December 28, 2009, 03:32:33 PM »
That sounds pretty typical if you are using the printer port.
Mine clunks too but 1/2" is quite excessive !
Best to do as you are and kill the controller first, or at least install a switch to disable the drives before killing the PC.
The port does weird things while booting up and shutting down.
Could do damage if you were very near a limit switch or hard stop.
RC
Re: shutdowm problem
« Reply #2 on: December 28, 2009, 04:49:49 PM »
you said if i use the printer port .  what else can i use if not the printer port?

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Re: shutdowm problem
« Reply #3 on: December 28, 2009, 04:53:45 PM »
There are quite a few external devices that you can use with Mach such as the SmoothStepper, DSPMC, Galil etc and they use either USB or Ethernet to connect rather than the parallel port.
Depending on your hardware you may be able to utelise the chargepump in Mach which should only allow movement when Mach is running.
Hood
Re: shutdowm problem
« Reply #4 on: December 28, 2009, 06:51:52 PM »
Hi hood   i need to connect a z zero plate to mach 3   the wire that connect to the plate where will i connect this
on my controller?
thanks paul
Re: shutdowm problem
« Reply #5 on: December 28, 2009, 08:45:28 PM »
Most pick an available input pin and configure it to the PROBE input.
(til zzzzzzzzzzzzzzzzzzz Hood zzzzzzzzzzzzzzzzzzzzzzz gets up)
Re: shutdowm problem
« Reply #6 on: December 28, 2009, 09:50:56 PM »
Easier way is to incorporate a charge pump controller into the breakout board then no problem when shutting down.