setting up output while homing

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9 years 11 months ago #82930 by Jake
setting up output while homing was created by Jake
I have limit switches that go directly to the servo drives and a seperate set going directly to the controller.

I need to have a high output while homing to bypass the servo limits.

I thought i found it in the manual for a homing output
Code:
# connect limit/home switch outputs to motion controller newsig Xminlim bit newsig Xmaxlim bit newsig Xhome bit net Xmaxlim axis.0.pos-lim-sw-in ppmc.0.din.01.in-not net Xminlim axis.0.neg-lim-sw-in ppmc.0.din.02.in-not net Xmaxlim axis.0.home-sw-in net Xhome axis.0.homing ppmc.0.dout.00.out newsig Yminlim bit newsig Ymaxlim bit newsig Yhome bit net Ymaxlim axis.1.pos-lim-sw-in ppmc.0.din.03.in-not net Yminlim axis.1.neg-lim-sw-in ppmc.0.din.04.in-not net Ymaxlim axis.1.home-sw-in #net Yhome axis.1.homing ppmc.0.dout.00.out newsig Zminlim bit newsig Zmaxlim bit newsig Zhome bit net Zmaxlim axis.2.pos-lim-sw-in ppmc.0.din.06.in-not net Zminlim axis.2.neg-lim-sw-in ppmc.0.din.05.in-not net Zmaxlim axis.2.home-sw-in #net Zhome axis.2.homing ppmc.0.dout.00.out

I get the error that ppmc.0.dout.00.out is already linked to home. I need this same output when I am homing each axis. It says the error is on line #26 which is the Yhome...homing..... line. But I need all three to do this with the same output. Is there another way to approach this?

Thanks!

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9 years 11 months ago #82933 by Todd Zuercher
Replied by Todd Zuercher on topic setting up output while homing
Use a couple of or2s to connect them all to one pin. (or try a different hal component like linuxcnc.org/docs/2.5/html/man/man9/logic.9.html )
Code:
loadrt or2 count=2 addf or2.0 servothread addf or2.1 servothread # connect limit/home switch outputs to motion controller net limitoverrideor2 <= or2.0.out => or2.1.in0 #newsig Xminlim bit (these are unnecessary) #newsig Xmaxlim bit #newsig Xhome bit net Xmaxlim axis.0.pos-lim-sw-in ppmc.0.din.01.in-not net Xminlim axis.0.neg-lim-sw-in ppmc.0.din.02.in-not net Xmaxlim axis.0.home-sw-in net Xhome <= axis.0.homing => or2.0.in0 net limitoverride <= or2.1.out => ppmc.0.dout.00.out net Ymaxlim axis.1.pos-lim-sw-in ppmc.0.din.03.in-not net Yminlim axis.1.neg-lim-sw-in ppmc.0.din.04.in-not net Ymaxlim axis.1.home-sw-in net Yhome <= axis.1.homing => or2.1.in1 net Zmaxlim axis.2.pos-lim-sw-in ppmc.0.din.06.in-not net Zminlim axis.2.neg-lim-sw-in ppmc.0.din.05.in-not net Zmaxlim axis.2.home-sw-in net Zhome <= axis.2.homing => or2.1.in1

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9 years 11 months ago #82937 by Jake
Replied by Jake on topic setting up output while homing
Thanks Todd,

Once I added "-" to servo-thread it got past that but I still have the Pin 'or2.1.in1' was already linked to signal Yhome, should the Zhome be

or2.1.in2?

Ill keep trying some things

Thanks again!
Code:
loadrt or2 count=2 addf or2.0 servo-thread addf or2.1 servo-thread net limitoverrideor2 <= or2.0.out => or2.1.in0 net Xmaxlim axis.0.pos-lim-sw-in ppmc.0.din.01.in-not net Xminlim axis.0.neg-lim-sw-in ppmc.0.din.02.in-not net Xmaxlim axis.0.home-sw-in net Xhome <= axis.0.homing => or2.0.in0 net limitoverride <= or2.1.out => ppmc.0.dout.00.out net Ymaxlim axis.1.pos-lim-sw-in ppmc.0.din.03.in-not net Yminlim axis.1.neg-lim-sw-in ppmc.0.din.04.in-not net Ymaxlim axis.1.home-sw-in net Yhome <= axis.1.homing => or2.1.in0 net Zmaxlim axis.2.pos-lim-sw-in ppmc.0.din.06.in-not net Zminlim axis.2.neg-lim-sw-in ppmc.0.din.05.in-not net Zmaxlim axis.2.home-sw-in net Zhome <= axis.2.homing => or2.1.in1

Thanks again

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9 years 11 months ago #82946 by Todd Zuercher
Replied by Todd Zuercher on topic setting up output while homing
No, the or2 inputs (there are only 2) are or2.n.in0 and or2.n.in1. There is no in2.

I think I see my mistake, (at least one of them)
net Yhome <= axis.1.homing => or2.1.in0
should have been
net Yhome <= axis.1.homing => or2.0.in1

To be honest, I rarely get significant hal code re-writes perfectly correct the first try. Too many subtle details to get wrong like the above.

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9 years 11 months ago #82947 by Jake
Replied by Jake on topic setting up output while homing
Thanks again Todd I'll try it in the morning! I kept trying little things, ran out of time and had to run the kids to gymnastics. It does make it a challenge when one character can derail the train.

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9 years 11 months ago #82957 by andypugh
Replied by andypugh on topic setting up output while homing
I think the "logic" component would be neater. Change "0x203" to "0x206" if you expand the machine to 6 axes.
Code:
loadrt logic personality=0x203 addf logic.0 servo-thread net x-homing axis.0.homing => logic.0.in-00 net y-homing axis.1.homing => logic.0.in-01 net z-homing axis.2.homing => logic.0.in-02 net any-homing logic.0.or => ppmc.0.dout.00.out

As a general note, it is no longer necessary to ever use "newsig" in HAL.

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9 years 11 months ago #82965 by Jake
Replied by Jake on topic setting up output while homing

andypugh wrote: I think the "logic" component would be neater. Change "0x203" to "0x206" if you expand the machine to 6 axes.

Code:
loadrt logic personality=0x203 addf logic.0 servo-thread net x-homing axis.0.homing => logic.0.in-00 net y-homing axis.1.homing => logic.0.in-01 net z-homing axis.2.homing => logic.0.in-02 net any-homing logic.0.or => ppmc.0.dout.00.out

As a general note, it is no longer necessary to ever use "newsig" in HAL.


Up and running! Thanks guys!

I have been meaning to go remove the rest of the "newsig"

Getting closer!

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