Setting up W 4th axis
- Todd Zuercher
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02 Nov 2011 12:07 #14510
by Todd Zuercher
Setting up W 4th axis was created by Todd Zuercher
I know I saw something about this once before, but darnd if I can find it now..
I have a router that I am considering converting to EMC2. It is a 4 axis machine with xyz and a true w (2 spindles each on its own axis with fixed spacing between them).
I know that I need to do some configuring of a, b, c, u, and v for w to work, but what exactly has to be specified, and what can be left out?
thanks
I have a router that I am considering converting to EMC2. It is a 4 axis machine with xyz and a true w (2 spindles each on its own axis with fixed spacing between them).
I know that I need to do some configuring of a, b, c, u, and v for w to work, but what exactly has to be specified, and what can be left out?
thanks
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02 Nov 2011 13:50 #14516
by andypugh
Replied by andypugh on topic Re:Setting up W 4th axis
Todd Zuercher wrote:
I might be tempted to treat that as a toolchange, with a fixed Y-axis offset on T2. As long as you program a retract-on-toolchange then HAL can swap the Z command signal between the actuators without an F-error (I think).
This is only any good if you don't intend using both spindles at the same time, of course.
To have it individually programmable as a W axis, you need placeholder sections for [AXIS_3] to [AXIS_7] (which I believe can be completely empty) and then the W data in [AXIS_8].
You also need [TRAJ] AXES=9 (even though it isn't true) and [TRAJ] COORDINATES = XYZW
It is a 4 axis machine with xyz and a true w (2 spindles each on its own axis with fixed spacing between them).
I might be tempted to treat that as a toolchange, with a fixed Y-axis offset on T2. As long as you program a retract-on-toolchange then HAL can swap the Z command signal between the actuators without an F-error (I think).
This is only any good if you don't intend using both spindles at the same time, of course.
To have it individually programmable as a W axis, you need placeholder sections for [AXIS_3] to [AXIS_7] (which I believe can be completely empty) and then the W data in [AXIS_8].
You also need [TRAJ] AXES=9 (even though it isn't true) and [TRAJ] COORDINATES = XYZW
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02 Nov 2011 20:01 #14526
by Todd Zuercher
Replied by Todd Zuercher on topic Re:Setting up W 4th axis
What I need to find is an example of the placeholders needed.
Is this only in the ini file, or is there things in the hal file as well.
Is this only in the ini file, or is there things in the hal file as well.
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02 Nov 2011 20:07 #14528
by BigJohnT
Replied by BigJohnT on topic Re:Setting up W 4th axis
In the ini file iirc just have
[AXIS_0]
through
[AXIS_8]
and only put things in the sections that you have an axis for like 0, 1, 2, and 8
John
[AXIS_0]
through
[AXIS_8]
and only put things in the sections that you have an axis for like 0, 1, 2, and 8
John
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27 Nov 2011 04:55 #15110
by Todd Zuercher
Replied by Todd Zuercher on topic Re:Setting up W 4th axis
Thanks, so I only needed the headings.
I thought there would need to be something more, and that was where I was going wrong.
I thought there would need to be something more, and that was where I was going wrong.
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