Random test, trying to understand feedrate
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Hi guys, I tried something really wacky over the weekend. I thought I would do an experiment and figure out the lowest speed of printing.
So I hooked up a duet to a few motors and stated with my test.
Procedure I followed was simple, I set the step per mm to 25600 (200*128) which makes 1mm movement equal to one rotation of the motor. then I moved the motor 100 mm and noticed the motor did turn 100 turns.
Now to check the various feedrates i sent a code G1 E100 Fxxx (xxx was varied from 1000 to 0.1)
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so as expected at F1000, the motor just ended up slipping(just made a noise but did not move)
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at F100, the motor moved 100 revolutions in 1 minute(perfect)
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for F10, the motor took 3 min 20 seconds to complete 100 revolutions
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then at F1and F0.1 the motor again took 3 min 20 seconds to complete 100 revolutions
I was wondering why the motor doesn't move slower at feedrates lower than 30mm per min!
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the duet has a lower limit for movement.
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can that lower value be edited?? where can we find it??
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as far as i understand, dc said that at the moment that is hard coded. but he was looking into changing that.
