Issue(s):
- Router won't return to the same spot when:
- Probing
- goto movements
- Outlining
- Router doesn't finish at the same spot
Resolution:
Probing, goto movements and outlining use high-speed "G0" movements where the motor might not be able to keep up with your machine if not tuned properly.
Mechanical
To confirm the machine is mechanically tuned, jog the machine using the arrows and increase the speed of the machine in the location below until you notice any issues.
The machine should be able to handle these speeds.
If there is an issue, refer to these:
LongMill - https://resources.sienci.com/view/lmk2-maintenance/#tuning-your-longmill
AltMill
- Motor functionality - detach the motors from the machine. Jog the machine to see if the motors spin approximately the same. Power off the controller and use your fingers to turn the shaft, ensure it is smooth with some resistance.
- Couplers are secured to the motor and ballscrew, and have not come apart
- Misalignment - the motor, coupler and ball screw should be centered with the circular cutout on plates. The motors should be mounted against Y-gantry plate or endplates without any gaps. Table legs and endplates should not be interfering. Re-assemble as needed
Firmware
If you can't manage to run at full speed, the other option is to reduce the maximum speed settings in the firmware by adjusting the following:
$110 - X-Axis Maximum Rate (mm/min)
$111 - Y-Axis Maximum Rate (mm/min)
$112 - Z-Axis Maximum Rate (mm/min)
$120 - X-Axis Acceleration (mm/s²)
$121 - Y-Axis Acceleration (mm/s²)
$122 - Z-Axis Acceleration (mm/s²)
Recommended defaults:
| $110 X-Axis Maximum Rate | $111 Y-Axis Maximum Rate | $112 Z-Axis Maximum Rate | $120 X-Axis Acceleration | $121 Y-Axis Acceleration | $122 Z-Axis Acceleration | |
| AltMill | 15000 | 15000 | 6000 | 1500 | 1500 | 1500 |
| LongMill | 4000 | 4000 | 4000 | 750 | 750 | 750 |
You can also try to energize the specific axis you are having issues with. Go to Config, find the setting "steppers deenergize" ($37) then toggle ON the axis.
#altmill #longmill #movement-issues #cutting-issues