Hi, for the last couple of days I’ve been trying to determine the source of what I can only describe as backlash.
All belts all tight and there is barely any movement at the x/y rails, there is some noticeable flex in the gantry but raising the workpiece 80mm to reduce this effect combined with tightening the belts reduced the “backlash” to about 0.5mm (big improvement compared to the attached image but still quite awful).
If I run the same gcode multiple times it follows the same exact path, so it’s unlikely to be a loss of steps.
It’s unlikely to be a fault in the gcode since the begin end-points are the same, also using the circle plugin in mach3 also gives this effect, although it might be to a lesser extend.
I still have this when I run extremely slow at 70mm/minute and a very shallow depth of cut, without noticeable improvement.
Any suggestions to test are very welcome.