[andy.f]

I am trouble shooting my 4020 and have no experience with Fadals.
I suspect the Z amp card might be faulty and have tried using the Y amp for the Z motor. It works fairly ok. In order to see if I can get rid of e-stop and do a cold start I would need to use the A axis amp for the Z motor, but this looks different from the X,Y and Z amps. Will it work or will I destroy something?

I am also having problems with the Z control card. It will not blink unless I remove a few other cards from the cage. Could be voltage as I only get 4,84VDC to the cage. The A axis card works better, but even after setting the J4 jumper to Z each 0,0001 pulse displays as 0,001. Not sure if it moves the same as the display or if the display is showing 10 times the pulse.

Andy

[Sprew]

With respect to your first question, The a axis card should work. My vmc 40 blew the y axis card and I stole the a axis card out of my 4020. That was a couple years ago.

[Neal]

If you are getting less than 5 VDC than you have a power problem. Check the 1220 DC power supply. Also it could be that one of the cards in the card cage is pulling down the 5 volts. You MUST have at least 5.0 VDC to operate properly.

Neal