- Configuring LinuxCNC
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- LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill
LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill
09 Apr 2021 20:04 #205463
by dansawyer
LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill was created by dansawyer
The system is 2.8.0 with a Pico Universal Stepper and Geiko 203v drivers. The machine is a Bridgport Series 1 CNC
Most everything appears to be working correnctly, however the quill withdraw between leters is faster than the machine can handle. The result is over the course of the engraving the quill goes lower and lower. That is the withdraw misses steps and the slow decent does not.
The quill appears to be missing steps on the withdraw.
What is the variable controlling maximum rate? Should I look at maximum rate or maximum acceleratoin?
The X and Y configurations are working corectly.
I hope this is the right place to ask this. Thank you in advance - Dan
Most everything appears to be working correnctly, however the quill withdraw between leters is faster than the machine can handle. The result is over the course of the engraving the quill goes lower and lower. That is the withdraw misses steps and the slow decent does not.
The quill appears to be missing steps on the withdraw.
What is the variable controlling maximum rate? Should I look at maximum rate or maximum acceleratoin?
The X and Y configurations are working corectly.
I hope this is the right place to ask this. Thank you in advance - Dan
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09 Apr 2021 20:35 #205469
by tommylight
Replied by tommylight on topic LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill
Max_velocity
and
max_acceleration for that joint/axis in the ini file, lower them by quite a bit.
and
max_acceleration for that joint/axis in the ini file, lower them by quite a bit.
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09 Apr 2021 21:30 #205479
by dansawyer
Replied by dansawyer on topic LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill
Thank you.
I am using an ini template from Pico USC. It has both a Joint and Axis sections. Should there be only one or the other, but not both?
What is the difference between a Joint and an Axis? Are they complementary or mutially exclusive?
Thanks, Dan
I am using an ini template from Pico USC. It has both a Joint and Axis sections. Should there be only one or the other, but not both?
What is the difference between a Joint and an Axis? Are they complementary or mutially exclusive?
Thanks, Dan
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10 Apr 2021 21:26 #205561
by andypugh
Replied by andypugh on topic LinuxCNC engraver example - quill withdraw too fast - Pico USC - BP BOSS mill
Joints are the physical actuators. Axes are the XYZ directions in space.
For many machines they are very nearly the same thing, but LinuxCNC treats them separately (It didn't for years, and it caused a whole lot of issues, this way is better)
From the user point of view, most machines run in joint mode until homed and then in axis mode. On a cartesian machine you probably won't see the difference.
For many machines they are very nearly the same thing, but LinuxCNC treats them separately (It didn't for years, and it caused a whole lot of issues, this way is better)
From the user point of view, most machines run in joint mode until homed and then in axis mode. On a cartesian machine you probably won't see the difference.
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- Configuring LinuxCNC
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