On 7/20/2016 12:19 PM, icecube45 wrote:
Hello!
I was wondering if there was any way to limit the movement speed of my machine
based upon the extrusion rate.
That is - if I limit my extruder to 11mm/s, the machine would not go faster than
it would be able to extruder.
You can set the maximum speed limit for the extruder axis in your INI
file. Since the motion planner is geared towards CNC machines and the A
(extruder) axis is considered part of the coordinated motion, all other
axis (X/Y/Z) will be slowed down to prevent exceeding the maximum
extruder speed.
The drawback to this setup is you won't be able to retract any faster
than you can extrude.
As far as I know, this doesn't currently happen. At least, that's what I presume
my following errors on the extruding axis are.
This is likely caused by the limits of the step generation logic, since
extruders typically have a very high steps-per-mm setting (due to
gearing and/or small hobbed pulleys) and high retract speeds to avoid
stringing. If this is your issue, you can increase the step generation
performance (lower the PRU cycle time if you're on a BeagleBone, get
some hardware assistance if you're on an x86 platform), reduce the
microstepping for your extruder axis (which lowers the required step
frequency), or reduce the peak extruder speed during retract.
--
Charles Steinkuehler
[email protected]
--
website: http://www.machinekit.io blog: http://blog.machinekit.io github:
https://github.com/machinekit
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