Limited velocity
I'm trying to use LinuxCNC to cut foam. My hotwire cutter has X Y U V axes.
My only problem is that the velocity is somehow limited to 60mm/min. With the feed override slider you can lower the velocity but not increase. I know foam cutter doesn't need much speed but I would like to have some more.
When I create a new 3 axis machine with the stepconf wizard, you can increase the speed as you like. But when I add the FOAM=1 and XYUV stuff in the INI file the 60mm/min limit pops up again. Any idea why?
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You can have your velocity set to whatever you like, irrespective of whether the machine can actually achieve it.
Without seeing your .ini file hard to say where the problem lies.
Have a look at linuxcnc.org/docs/2.5/html/config/ini_config.html
There are a confusing number of possible velocity settings and if you had
[DISPLAY]
MAX_LINEAR_VELOCITY =
set to one thing and your axes to another, that could do it
regards
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You are right about that!There are a confusing number of possible velocity settings...
I tried to fiddle with various velocity settings without any luck. I attach my .ini file to this post. BTW I'm using Linuxcnc 2.6.0.
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I found the problem - eventually
The axes are notated in the .ini file as [AXIS_X] , [AXIS_Y] etc
I have not seen this before, haven't used stepconf for years, so maybe that is what is produced now.
If you substitute the joint number, so that it becomes [AXIS_0], [AXIS_1] etc. it works as it should, with jogs up to 1500mm/min .
Attached the .ini file I used to test in the sim, along with all the other VELOCITY settings filled in, which you can adjust or remove as you wish
regards
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I add the FOAM=1 and XYUV stuff in the INI file
What is FOAM and are there documents on this?
John
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Thank you so so much! Works like a charm.
I saw a .ini file some time ago with [AXIS_ 'letter of the axis'] and thought that is more easier to read than numbers. So I changed numbers to letters. Didn't notice the velocity drop back then.
Thanks again for your work. Really appreciate.
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In the comments.
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I doubt it, as HAL is not the only consumer of INI data, and MOTION gets its info from the [AXIS_0] etc stanzas.The axes are notated in the .ini file as [AXIS_X] , [AXIS_Y] etc
I have not seen this before, haven't used stepconf for years, so maybe that is what is produced now.
In fact, these are joint/actuator limits so should be numbered rather than lettered anyway.
(Unless the INI also contains [JOINT_0] Which I think it is the case in some variant branches.)
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