Messages

1

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: probe ground-PMDX 122-probe ground

« on: October 27, 2017, 11:43:10 PM »

thanks, steve..I will recheck my leads.  when I do a diagnostic, the digital light comes on, but it also kicks the e-stop button on Mach 3.  I will reverse the leads and try again.

2

Parallel Port breakout boards, motherboards, and dedicated accessories / probe ground-PMDX 122-probe ground

« on: October 26, 2017, 12:33:42 AM »

I am attaching a probe on my PMDX 122 attached router... using J5=15 pin to send the signal.  I was given a schematic which showed using the J6 ground.  Is there any specific reason this should be used?  One of the posts I read stated any ground would suffice, but I do already have  an e-stop grounded on the J6 connection.  My J5 ground is unused, though.  Is there any reason this ground should be avoided?  I am new to electronics, but decades ago I learned in the world of 240 and 480 volts, any ground is perfectly okay.
Thanks much for the help...