Hi,
A couple of years ago I purchased a K6100a and shipped it over from China. I use Mach3 and a SmoothStepper to control the machine - the pendant controller they supplied couldn't interpret the G-Code from SheetCam so I installed a separate controller - which has always worked well, and I have the same setup on my mill. I don't use it much - maybe its done about 30 hours or so, and after 1 year I went to use it and it seems to have a mechanical problem.
When cutting in certain directions and angles, the machine shudders - the noise you get when a stepper motor is stepping but can't move the shaft. This mostly happens when it begins cutting in Y+ direction, and most often when cutting at an angle in the Y+ and X- direction. After this event happens, the Y axis position is usually corrupted, and occasionally the X axis as well. My guess is the Y stepper motor is getting its pulses but seems to be jamming. However this may not be the case.
I've tried lots of things like slowing down the maximum cutting speeds, and also slowing the acceleration. The problem persists when cutting materials or just cutting in free air.
We looked under the machine and noticed that the Y ball screw bearing has a part that has separated. See the picture. I'm not sure if this is just a seal, or mechanically holds the balls inside the mechanism.
Appreciate any comments. It would also be good if anyone knows of a CNC maintenance person in the Melbourne area.
David
A couple of years ago I purchased a K6100a and shipped it over from China. I use Mach3 and a SmoothStepper to control the machine - the pendant controller they supplied couldn't interpret the G-Code from SheetCam so I installed a separate controller - which has always worked well, and I have the same setup on my mill. I don't use it much - maybe its done about 30 hours or so, and after 1 year I went to use it and it seems to have a mechanical problem.
When cutting in certain directions and angles, the machine shudders - the noise you get when a stepper motor is stepping but can't move the shaft. This mostly happens when it begins cutting in Y+ direction, and most often when cutting at an angle in the Y+ and X- direction. After this event happens, the Y axis position is usually corrupted, and occasionally the X axis as well. My guess is the Y stepper motor is getting its pulses but seems to be jamming. However this may not be the case.
I've tried lots of things like slowing down the maximum cutting speeds, and also slowing the acceleration. The problem persists when cutting materials or just cutting in free air.
We looked under the machine and noticed that the Y ball screw bearing has a part that has separated. See the picture. I'm not sure if this is just a seal, or mechanically holds the balls inside the mechanism.
Appreciate any comments. It would also be good if anyone knows of a CNC maintenance person in the Melbourne area.
David