Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: davidhn on June 01, 2006, 02:59:28 PM
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I wonder if anyone can help me sort this one out:
I tried 'dry running' Mach3, licensed version, on two computers:
Computer 1 (Athlon 2.01 GHz, 1Gb RAM). Running XP Home SP2 with updates.
Computer 2 (Dell 1100, Celeron 2.79 GHz, 1Gb RAM). Running XP Home SP2 as installed by Dell 25 May 2006.
The interface board requires step pulses on pins 2, 5 and 8 for X,Y and Z axes respectively.
On both computers the Mach3 software runs OK but when (with jog keys used to send pulses, or with a G-code file running) a 'scope is applied to the appropriate pins on the parallel port of either computer there is output only from the X axis (pin 2). No output on pin 5 or pin 8.
Suspecting that XP might be interfering with the parallel port I installed a PCI parallel port card on computer 2 and configured Mach 3 to direct the output to this port (port 2), but the problem persists.
Has anyone else had a similar problem, or is anyone aware of XP interfering with the use of the parallel ports?
In anticipation......
Many thanks
David
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Check to see that you done have any other pins set set to the same number and be sure that you have it set to Port 1 :)
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Thankyou Brian.
It was the cable which I mistakenly thought was a 'straight-through' type when in fact it was a 'crossover' for linking two computers..... :-[
David
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I have had that happen to me in the past too ::) I took the loppers to the cable after that ;D