Just finished building a new CNC table using the Sosylva Plans. Spent many hours aligning it make sure the axis are all moving freely and nothing is binding but I keep coming back to the same issue and starting to wonder if it has something do with the electronics. Here is what is happening.
I appear to have it calibrated everything moves very smoothly on all axis. Wrote a bunch of code to work each axis individually and they all work fanastically at 52"/min and acceration of 4". Now put the code together for multiple axis movements and all appears fine for a while, then all of sudden on one or more axis it will make this lovely grinding/growling sound and they stop moving then or shortly afterward. I have tried tons of stuff, some but not limited to: reduce speed to 30" (just takes longer for it to happen), reduce acceleration, shut down driver board and move axis at point of issue and it feels very smooth with no drag. In order to see what it would take to stall the machine I applied pressure one time on gantry till the motor did the same thing this time due to my fault... it took significant force to cause this.. no way any of my axis are out this much of.
As well I can be jogging along at 50"/min and change direction or something random and poof it does it. For example press the left button for 10" or so then reverse direction and then back again poff it looses it. You apparent reason.
Normally you never know when it is going to happen, most often it is when one axis is moving slower than the others, for example:
g00 x0 y0 z0
g00 x1 y1 z-6
or
g00 x0 y0 z0
g00 x1 y5 z-1
and the step slope appears to shut down one or more of the axis (usually only one but at times two), then try
g00 x0 y0 z0
goo x5y1z-1
and it could happen again. But if you just run all the axis by them self they work perfectly. Two axis I have running so smooth now you can barely hear them running (y and z). X axis is noisey because of the longer threads and the rod wonder a little.
Many times I can tell when it is going to happen. The machine is instructed to change direction and you can hear one or more of the axis groaning as it moves along, unless it is a very short movement you know it is going to crash.
This happens to any of the axis (normally y and z) and it is random. Run the same pattern 10 times it might happen 3 times.
Starting to believe it has something to do with the electronics portion.
I have the 4 axis prepackage from Xylotex. Suppose to be plug and play, no need to set vRef or install and hardware.
Any one got any advice for me?
Thanks in advance for your help.