VMC related HAL questions.
31 Dec 2015 09:13 #67587
by thewho
Replied by thewho on topic VMC related HAL questions.
Yay, I can activate outputs from MDI 
But I also noted that I need to home the spindle(?) because where it's at when I start linuxcnc is going to be 0 deg. And that is no problem unless someone (me) rotates the spindle by hand when the machine is turned off..
Any ideas?
But I also noted that I need to home the spindle(?) because where it's at when I start linuxcnc is going to be 0 deg. And that is no problem unless someone (me) rotates the spindle by hand when the machine is turned off..
Any ideas?
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31 Dec 2015 14:52 #67595
by andypugh
Ah, yes, you have just reminded me of something else on my list of things to do when I get round to it.
I intend to add the spindle to the homing sequence.
sourceforge.net/p/emc/mailman/message/34441533/
What is required is to set the spindle-index-enable to true, then rotate the spindle until it goes false.
Until this is added to the homing sequence I think it will have to be done by cunning and guile.
The spindle-index-enable signal can be set true in the HAL file:(assuming that the spindle index enable signal is called spindle-index-enable)
You then need to ensure that the spindle rotates once through index to reset the encoder.
Adding a sequence of fixed direction moves to the toolchange G-code is probably the best way to do this.
Note that this won't necessarily work properly if the motion.spindle-orient-mode pin is not netted to the orient.0.mode pin. I forgot to do that in the sample HAL file.
Replied by andypugh on topic VMC related HAL questions.
Yay, I can activate outputs from MDI
But I also noted that I need to home the spindle(?) because where it's at when I start linuxcnc is going to be 0 deg. And that is no problem unless someone (me) rotates the spindle by hand when the machine is turned off..
Any ideas?
Ah, yes, you have just reminded me of something else on my list of things to do when I get round to it.
I intend to add the spindle to the homing sequence.
sourceforge.net/p/emc/mailman/message/34441533/
What is required is to set the spindle-index-enable to true, then rotate the spindle until it goes false.
Until this is added to the homing sequence I think it will have to be done by cunning and guile.
The spindle-index-enable signal can be set true in the HAL file:
sets spindle-index-enable 1You then need to ensure that the spindle rotates once through index to reset the encoder.
Adding a sequence of fixed direction moves to the toolchange G-code is probably the best way to do this.
O900 IF [<_tool_in_spindle> EQ 0]
M19 R180 P1
M19 R 0 P1
O900 ENDIFNote that this won't necessarily work properly if the motion.spindle-orient-mode pin is not netted to the orient.0.mode pin. I forgot to do that in the sample HAL file.
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02 Jan 2016 21:49 #67725
by thewho
Replied by thewho on topic VMC related HAL questions.
It's working! 
I finally learned the basics of hal and got the spindle orient routine to work really good. I had to limit the output so that I could get a fast response without excessive overshoot.
There is still work to be done in the subroutine but I'm really close to being satisfied with it
I finally learned the basics of hal and got the spindle orient routine to work really good. I had to limit the output so that I could get a fast response without excessive overshoot.
There is still work to be done in the subroutine but I'm really close to being satisfied with it
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23 Jan 2016 13:13 #68961
by thewho
Replied by thewho on topic VMC related HAL questions.
What are you talking about Jake?
Today I'm running the first parts on the machine and found something that I have overlooked previously.
If tool in spindle is the required one it still does a toolchange.
I don't want to screw something up (did enough of that two days ago) so I'm asking before I try anything
Will this work?
Today I'm running the first parts on the machine and found something that I have overlooked previously.
If tool in spindle is the required one it still does a toolchange.
I don't want to screw something up (did enough of that two days ago) so I'm asking before I try anything
Will this work?
IF [#<tool_in_spindle> EQ #<selected_tool>]
o<toolchange> endsub [1]
ENDIFPlease Log in or Create an account to join the conversation.
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