6 Axis Machine Setup
- CanadianNC
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29 May 2016 02:26 #75208
by CanadianNC
6 Axis Machine Setup was created by CanadianNC
Hi,
I've been working on retrofitting a monster 5 axis router with dual x tables and I'm getting along pretty well. I have a few questions that I can't find answers to and can't figure out on my own.
The setup is a 7i80DB with 2 7i77. All 6 axis are running off one of the 7i77 and the spindle and some other IO is running off the second one. The axis are XYZBCU (U being the second X table).
I have all of the axis moving EXCEPT the 6th axis that doesn't have it's enable linked to all of the others. This leads me to my first question:
How do you enable the 6th axis on a 7i77? I have "net u-enable axis.6.amp-enable-out" in my HAL file but it doesn't seen to work. Am I missing another line?
My other question is:
How do you use Linuxcnc and a 7i77 drive enable output with a drive that disables when you ground it's input? They call it a drive lockout.
Some quick HAL examples would be a huge help.
Thanks!
I've been working on retrofitting a monster 5 axis router with dual x tables and I'm getting along pretty well. I have a few questions that I can't find answers to and can't figure out on my own.
The setup is a 7i80DB with 2 7i77. All 6 axis are running off one of the 7i77 and the spindle and some other IO is running off the second one. The axis are XYZBCU (U being the second X table).
I have all of the axis moving EXCEPT the 6th axis that doesn't have it's enable linked to all of the others. This leads me to my first question:
How do you enable the 6th axis on a 7i77? I have "net u-enable axis.6.amp-enable-out" in my HAL file but it doesn't seen to work. Am I missing another line?
My other question is:
How do you use Linuxcnc and a 7i77 drive enable output with a drive that disables when you ground it's input? They call it a drive lockout.
Some quick HAL examples would be a huge help.
Thanks!
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29 May 2016 03:26 - 29 May 2016 03:28 #75211
by PCW
Replied by PCW on topic 6 Axis Machine Setup
On a 7I77 the 6th axis has a separate enable so it can be used for spindle control
enables for axis 0..4 are named: hm2_somecard.0.7i77.X.Y.analogena
and enables for axis 5 is named hm2_somecard.0.7i77.X.Y.spinena
( somecard,X,Y depend on your hardware )
If you have active low disables its probably easiest to use a small relay
Sometimes you can use a pulldown resistor on the disable pin and wire the enable OPTO on the
7I77 to pull the pin up to the appropriate voltage to enable the drive.
I have considered using FormB (normally on) OPTOs on a variant 7I77 model for this purpose
but have not done it yet
enables for axis 0..4 are named: hm2_somecard.0.7i77.X.Y.analogena
and enables for axis 5 is named hm2_somecard.0.7i77.X.Y.spinena
( somecard,X,Y depend on your hardware )
If you have active low disables its probably easiest to use a small relay
Sometimes you can use a pulldown resistor on the disable pin and wire the enable OPTO on the
7I77 to pull the pin up to the appropriate voltage to enable the drive.
I have considered using FormB (normally on) OPTOs on a variant 7I77 model for this purpose
but have not done it yet
Last edit: 29 May 2016 03:28 by PCW.
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