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HP 7440 Colorpro Plotter Troubleshooting

spiceminer

Experienced Member
Joined
Mar 8, 2014
Messages
148
Location
Europe
Hi!
I have recently acquired a ColorPro Plotter that obviously spend some decades in a dirty barn. After cleaning operatings, I tried to switch it on.

Unfortunately, it will not initialize properly. There are no end switches etc, just two DC motors with encoders.

https://youtu.be/gVn8qBpYw2Y

it looks like that a working Colorpro moves the pen carrier to the left and not to the right first (time 0:55)

https://youtu.be/UNBNoo0d4HE

Anybody any ideas?

Thanks a lot
Stephan
 
Maybe anybody owns such a device and could provide an image of how to connect the stepper motors to the mainboard? Maybe I made a mistake during re-assembly.
 
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