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Z axis brake
Posted: Tue May 27, 2014 8:29 am
by danny
We have a problem where to connect the brake. We did find an output on the GIO4D labelled brake on the third axis however it does not activate on and off. We tested the enable and it did not activate also.
The inputs where wired according the manual. We are thinking that these outputs are not active when we are using the optically coupled drives Centroid AC/DC drives. From where can we get an output for the brake?
Regards
Daniel
Re: Z axis brake
Posted: Wed May 28, 2014 1:45 am
by cncsnw
If your PLC program is like the example I am looking at (gpio4d-acdc-basic-mill.src from the v3.12 release package), then it appears Centroid did not reserve any particular outputs for axis brake functions.
If you want an open-collector output (e.g. OUT19 on the GPIO4D axis #3 header), you could use that one, by adding the following line to your PLC program:
Code: Select all
IF SV_PC_POWER_AXIS_3 THEN (Axis_3_Enable)
If you prefer a relay output (any otherwise-unused output, e.g. OUT15) then add a couple lines:
Code: Select all
; in the Output Definitions section:
ZServoBrakeRelease IS OUT15
; and in AxesEnableStage or MainStage:
IF SV_PC_POWER_AXIS_3 THEN (ZServoBrakeRelease)
Re: Z axis brake
Posted: Wed May 28, 2014 7:16 am
by danny
HI .
Thanks again for your help !! Problem solved , Well done .
Re: Z axis brake
Posted: Fri Jun 13, 2014 12:44 pm
by AMDlloydsp
In that same vein, is there a way to only engage the brake after a fixed time delay after spindle-off?
Although it works, we don't like the R2E4 spindle brake. It's just too violent. Yet, we need it for tool changes.
So, we leave it completely manual. But it would be nice if one could time the application of it, so it only applies after the spindle has stopped (or nearly so).
Lloyd