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General Mach Discussion / Re: Progressive Move Error with X and Y

« on: September 24, 2008, 12:06:55 AM »

I have had problems with constant velocity mode also.  Specifically rastering back in forth in the Y direction.  With CV enabled it would always seem to stop short in the y direction sometimes by even .06.  Increasing the acceleration does help, but with a 100+ lb. gantry, it was sure hard on the machine at around 130ipm.  I tried everything under the sun to eliminate it to no avail.  Changing from CV to exact stop solved the problem in that it would make the full travel in the y direction before advancing in the x, but as you already know doing 3d work in exact stop is a night mare.  There was one other thing that seemed to work and that was, going into the settings page and enable tangential control and set lift angle and lift Z to 0.  This makes sure that the y travels the full distance before advancing in the x direction and coming back.  Maybe something you can try.

John