A/B Pulse Train Output

AllenF

Member
Join Date
Aug 2002
Location
Southwest Ohio
Posts
24
I have a question about the Continuous Jog mode.

I'm using a ML1200 to run a simple 1 axis servo (Ultra).

When I got around to programming the Jog features, I ran into
a problem of reading from the PTO and updating the machine
position on a PanelView300 when the PTO is set for Continuous Jog.

I abandoned trying to use the Continuous Jog mode.

I did a workaround by checking the jog button, issuing a set
number of pulses, update the position, check the jog button
and repeat if jog button is on.
This works rather smoothly to my surprise.

The PTO operates independent of the program scan, hence you can
only read number of pulses output and update machine position after
it is done.

This seems to be the case for Continuous Jog mode also.
Have I missed something here? Is there a way to keep track
of the pulse output while it is in Cont. Jog state?

Thanks in advance,
Allen F
 
I have not used the PTO before but when programming a jog in the 1394 servo controllers, I usually start a move command to the soft position limit. Then I monitor the state of the jog pushbutton and when the operator lets go, I issue a stop axis command. This has the added benefit of never letting the operator jog past the soft limit.

HTH

Norm Dziedzic
Belden Machine Corp.
 

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