@ Dave and Bill: So just a quick update on my previous post, after
Back on topic: I think we should be tackling backlash from both angles.
How hard would it be to have an experimental version of Marlin where some
On Thursday, September 20, 2012, Boman33 <Boma...@vinland.com> wrote:you have advanced motion control software it adds lots of problems for the
> Although it is easy to add or subtract steps on a static system, but once
trajectory planning software when it is moving quickly.
acceleration and deacceleration for adding those steps and that interferes
> The steps cannot be instantaneously added so there are issues of
with the planned movement of the other axis. There have been long
discussions in the CNC groups about the problems with backlash compensation
and fast moving machines.
print speed. Even if the X-Y moves correctly, the head might wobble
> On top of that, I think most of the backlash is dynamic and varying with
because of acceleration forces. So in summary, fix the hardware.
in the control, maybe this could be fixed in the UM firmware ?
> From: catohagen Sent: Thursday, September 20, 2012 04:08
> I work with cnc machines, and usally backlash is adjusted with parameters
the axis 40mm but the hardware moves 39,7mm) the firmware could handle this
> if using a dial gauge and your X-axis have 0.3mm backlash (gcode moves
with driving the stepper the desired extra steps to compensate for backlash.
> There are also forums, which are the official gathering place for
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