On Sun, 12 Jul 2020, Sam Sokolik wrote:
Date: Sun, 12 Jul 2020 21:42:23 -0500
From: Sam Sokolik <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: Re: [Emc-users] Because the hardware store was 4 miles away...
On Sun, Jul 12, 2020 at 1:50 PM Sam Sokolik <[email protected]> wrote:
Currently - there is no way to adjust it. I do run the acceleration and
velocity as high as I can. (on the emco it is in above 50in/s^2) I do
have some math that calculates the following error of the shape (actual
shape vs axis position) and decide how fast to run the spindle to get the
tolerance I want. There should be some sort of trajectory planning - but
that might be above my pay grade
(mostly academic for me - just wanted to see how well it works...)
sam
I wonder if you could compensate for the twisting of the corner
positions (due to acceleration bound) by pre-distorting the X Axis
motion based on acceleration limits and spindle speed. A simple
spindle speed scaled variable lead angle could align the corners
(but would rotate the flats where no compensation may be needed)
Peter Wallace
Mesa Electronics
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