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Configuring LinuxCNC
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Advanced Configuration
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4th axis tangent to path XY
4th axis tangent to path XY
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26 May 2012 21:04 #20430
by billykid
hi all
I tried tangentkins. and seems to work, only that I have the button touch off inactive (gray)
you know it can be?
thanks
Mauro
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26 May 2012 23:28 #20432
by andypugh
billykid wrote:
hi all
I tried tangentkins. and seems to work, only that I have the button touch off inactive (gray)
you know it can be?
Sorry, no, I have no idea. I doubt it is related to the kinematics, I assume there is something about the machine state in Axis that means that touch-off isn't likely.
Do you need to switch to World Mode? (xyz positions, not 123 joints). There is a menu option, or use $
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27 May 2012 00:41 #20437
by BigJohnT
In Axis you can only touch off when E-Stop is out, Power is On and you are in World Mode. F1, F2, $ is the shortcut keys.
John
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27 May 2012 16:43 #20450
by billykid
Many thanks Andy, John ! touch off work properly but axes in world mode are noisy, I think perhaps excessive gain.
in mode 0 1 2 3 the movement is fluid.
I will try the next version of tangentkins so that it can be enabled only when needed.
regards
mauro
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23 Jul 2013 11:23 #36928
by nkp
tell me please , how to activate the tangentkins and in the mode "manual"?
To make it work in all modes without exception...
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23 Jul 2013 16:01 #36932
by andypugh
tell me please , how to activate the tangentkins and in the mode "manual"?
To make it work in all modes without exception...
Unfortunately Tangentkins is something of an experiment that nearly worked, rather than a good solution to the issue.
If I was doing it now, I think that I would use the axis.0.joint-vel-cmd and axis.1.joint-vel-cmd pins to calculate the tangent direction, and probably use a custom HAL component to drive the rotary axis.
This custom HAL component might require a link to the feed over-ride pin to slow the motion on a reversal.
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20 Oct 2015 19:06 #63999
by mgenton85
Has there been any further dev on tangential path follow or does anyone know of a cam program that will give the c axis output with xyza ?
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20 Oct 2015 20:57 #64002
by andypugh
Has there been any further dev on tangential path follow or does anyone know of a cam program that will give the c axis output with xyza ?
From a quick Google it seems that Gcodetools (a plug-in for Inkscape) can do this.
An alternative would be an input filter for LinuxCNC. This would take normal XY G-code and add additional C-axis moves.
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20 Oct 2015 22:08 #64005
by mgenton85
Has there been any further dev on tangential path follow or does anyone know of a cam program that will give the c axis output with xyza ?
From a quick Google it seems that Gcodetools (a plug-in for Inkscape) can do this.
An alternative would be an input filter for LinuxCNC. This would take normal XY G-code and add additional C-axis moves.
yeah that makes no sense to me
i tried to use the tangentkins with 2.6.4 but all that happens is joint 3 following error and i dont really understand the language yet
if tangentkins worked that would be ideal can you provide a helpful link so i can decode and learn your program? because i really need to have this capability and i refuse to go back to mach mach 60 ipm with steppers linux 200 ipm same setup except for encoders yeah not going backwards
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20 Oct 2015 22:21 #64006
by andypugh
can you provide a helpful link so i can decode and learn your program?
Can you re-phrase the question? I am not sure what you mean.
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Configuring LinuxCNC
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Advanced Configuration
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4th axis tangent to path XY
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