A and B axis jog very slow when angular velocity is specified in display section

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24 Jan 2024 17:32 #291535 by reBrick
A and B axis jog very slow when these are defined in display section... 
DEFAULT_ANGULAR_VELOCITY = 5.60
MIN_ANGULAR_VELOCITY = 0
MAX_ANGULAR_VELOCITY = 56.00

This affects A and B even when the joint is type linear 

If I change display to axis, the jog function is normal. If I remove the angular specification in gmoccapy the jog is normal. Jogging with pendant is normal in all cases, this is a gmoccapy display issue.

Thanks for taking the time to consider my problems!

File Attachment:

File Name: knee-mill_...1-24.hal
File Size:7 KB
 

File Attachment:

File Name: knee-mill_...1-24.ini
File Size:4 KB
Attachments:

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31 Jan 2024 20:35 #292102 by spumco
Gmoccapy appears to define the max/min angular jog velocities in degrees/minute.

github.com/LinuxCNC/linuxcnc/blob/master...gmoccapy.glade#L1403

Which means a value of "56" will result in 56 degrees per minute - painfully slow.

If you want 56 degrees/second, try increasing by a factor of 60.  Same with the default velocity value.

Note that the same glade file appears to have a max limit of 3600.  This may need to be changed in a glade editor:

forum.linuxcnc.org/gmoccapy/38811-gmocca...ular-velocity#163532

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31 Jan 2024 23:39 #292111 by reBrick
It shouldn't affect Linear axis. Joint 3 and Joint 4 are both linear.

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01 Feb 2024 01:42 #292116 by spumco
Sorry, misunderstood your config.

Try adding this to INI:
[AXIS_A]
TYPE = LINEAR

[AXIS_B]
TYPE = LINEAR

I had a similar problem just the other day with axis GUI.  The gui was programmed to interpret XYZUVW as linear axes unless specifically defined in [AXIS].  This meant my W rotary axis was clamped by the gui at linear units.

Gmoccapy may have the same or similar programming.

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01 Feb 2024 02:26 #292117 by reBrick
Thanks for the pointers. I have increased the angular velocity, maybe too much. Setting axis to linear didn't resolve the problem, A and B respond to angular settings in GUI whether linear or angular.

 

File Attachment:

File Name: knee-mill_...1-31.ini
File Size:4 KB
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01 Feb 2024 03:20 #292118 by spumco
You may want to open a ticket on github for this.  If gmoccapy isn't responding as expected  - that is using the expected units & limits for an axis type - the devs should know about it.

Or clarify in the user manual how to set an axis, or there are arbitrary restrictions on linear axis names.

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28 Feb 2024 04:25 #294658 by reBrick
It was pointed out to me by Andy Pugh that convention is to use W for a second Z axis (I didn't realize the association with existing axes) and if I change the 4th linear axis from A to W this is no longer a problem. The problem I have now is that gmoccapy doesn't seem to render the build volume correctly with W axis, so the model is displayed far outside the build volume. Simply going back to axis seems to work fine.

 


File Attachment:

File Name: knee-mill_...2-27.hal
File Size:7 KB
 

File Attachment:

File Name: knee-mill_...2-27.ini
File Size:4 KB
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28 Feb 2024 05:21 - 28 Feb 2024 05:56 #294661 by scotth
Can you show us your machine's physical layout?
W normally is linear and runs parallel with Z.
In your ini file, A has different max limit than joint4.

Look at      www.mastercam.com/news/blog/multiaxis-ma...ks-and-its-benefits/

 
Last edit: 28 Feb 2024 05:56 by scotth.

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28 Feb 2024 06:05 - 28 Feb 2024 06:08 #294664 by reBrick
It's a knee mill Z is quill, W is knee and A is rotary table. I haven't connected rotary table yet, just trying to get the configuration working and attempting to run a job with the XYZW (really just XYZ as I don't address W in gcode).
Last edit: 28 Feb 2024 06:08 by reBrick.

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28 Feb 2024 06:21 #294665 by scotth
In the program, anything with a G1 will try and reach the endpoint in a coordinated move, with all axis reaching the final point at the same time. A slower axis will limit axis velocity.

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