Menu ▾ ▴

#416 Parallel port: multiple 'Amplifier enable' pins needed. Only one works

2.6
open
nobody
None
1
2015-10-29
2015-02-22
Ageraluon
No

I am using a driver circuit that needs three enable pins - one for each axis. In the former versions of Linuxcnc, I simply needed to mark all three pins as 'Amplifier Enable' pins in the stepconf wizard. However in the Debian release 2.6, only the first pin marked as Amplifier Enable works correctly, while the rest of the pins are ignored. For instance, in the attached picture, only pin 2 would operate, enabling only one axis.

Currently, I am using linuxcnc 2.6.7. hooked to a TB6560 driver circuit for three stepper motors via parallel port.

If the first pin that should work as 'Amplifier enable' is set to 'Ignore', only the second pin works correctly, etc..

1 Attachments
Screenshot stepconf.png

Discussion

  • Ageraluon

    Ageraluon - 2015-02-22

    Correction: This only seems to be a problem occuring in the stepconf wizard. In the Axis GUI all pins are operated.

    In the stepconf wizard however, only one axis can be tested.

     

  • andypugh

    andypugh - 2015-10-29

    My understanding is that the Stepconf wizard doesn't toggle any enable pins during the axis test. The fact that one motor works and others don't may be more a matter or luck than intent.