[Al_The_Man]

The skip input cannot be made conditional so it does not show up in the ladder AFAIK.
When writing G31 routines or macro's it is customary to have a protected positioning move, this is a routine that would typically be used to move the probe to initial position in say rapid, IOW, any move of the probe should include a G31.
The standard G31 input is sent from PLC to CNC via the BMI, an optional High speed skip input is available through an add on board and option parameter that directs the high speed G31 skip input directly to the CNC side.
Al.

[derekBPcnc]

Hi Al,

I've been thumbing through the manual -
It says that the input interface signals 1 to 32 can be read by variables #1000 to #1031.
I'm hoping that the skip x4.7 is connected to one of these i/ps
I haven't got the electrical drawings with me, so I'll have to check when I get to work tomorrow.

I just want to check the probe closes on the back off move...just a bit of error checking realy, or that the tool hasn't mashed the tool setter ;-)

I wasn't sure if i could use a G31 with a G0 - I'll give that a try too.

ATB

[angelw]

Hi Al,

I've been thumbing through the manual -
It says that the input interface signals 1 to 32 can be read by variables #1000 to #1031.
I'm hoping that the skip x4.7 is connected to one of these i/ps
I haven't got the electrical drawings with me, so I'll have to check when I get to work tomorrow.

I just want to check the probe closes on the back off move...just a bit of error checking realy, or that the tool hasn't mashed the tool setter ;-)

I wasn't sure if i could use a G31 with a G0 - I'll give that a try too.

ATB

I wasn't sure if i could use a G31 with a G0 - I'll give that a try too.
No you can't. G31 is a one shot command that is terminated by the slide reaching the end point or by the change of state of the switch, and functions similarly to G1. Accordingly, if you want rapid movement in the G31 block, include a fast feed rate.

I just want to check the probe closes on the back off move...just a bit of error checking realy, or that the tool hasn't mashed the tool setter ;-)
You have the logic correctly planned. The switch should be made when the tool/probe is in fresh air. A broken wire etc in the system will therefore fail safe.

Regards,

Bill