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Old 02-06-2007, 05:27 PM
erase42 erase42 is offline
 
Join Date: May 2004
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there must be a difference in the way deskcnc sets up foam cutting files as opposed to those for a regular machine. Ive never used it to run a mill or router, so maybe its hard for me to explain. when i create a file for foamcutting, there is a setting that asks how long of segments i want to break the motion into. so if i cut a 1 inch square with the setting at .1 the machine makes 40 tiny moves, 10 on each side. the software is apparently trying to decelerate and accelerate for each and every one of these moves. so when the machine is making a perfectly long straight cut, the motors (steppers adobe not servos here) are constantly pulsing. I imagine with a normal file for a mill, that the machine is only asked to decelerate and accelerate at the end of straight cuts and perhaps many small steps aroud a radius, is this true? A foam cutter can not change speed thru a cut, it must remain a constant (there are exeptions), there is no high speed moves above a z plane, in fact there are no such things as a G0 anywhere in any foam cutter g code. I guess the perfect thing for my machine would be no acceleration or decelleratoin between moves, but only when beginning motion from a standstill, or when there is a direction change of greater than 45 degrees between any two adjacent steps of motion. does this description help anyone understand what my problem is? Not slamming into and around corners, but rather slamming along in a straight line. The pulsing of the motors sets up a vibration in my 9 foot long wire which causes a poor cut, and accessive kerf. I guess I need to figure out what is the fastest speed that i can start my motors from zero without losing steps. then finding the max speed at which i cut and choosing the fastest accel between the two.
Im hoping that the constant motion contouring feature would help with this, but the description of its opperation is not made very clear in the help files, and i cant find the manual on line and would be surprised if it helped much more than the help files.
hope to hear from someone
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Last edited by erase42; 02-06-2007 at 05:48 PM. Reason: sent before done
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