09-09-2022, 07:41 PM
Having used the mill for a while now, the motor is definitely under powered. It's curious that PM's cheaper made in China mill has a 2HP DC motor but the PM-728 only has a 1HP DC motor. 
I'm not the only one complaining about the wimpy motor. One guy replaced his with a servo motor, not for CNC purposes but just for the increase in power especially at lower RPMs.
There were a few things that I had to fix in order to get it to run smooth and now, other than the wimpy motor, it's running pretty smooth.
One other thing that I don't like about it is the X and Y handles. They have a revolving handle that's nice and smooth but the revolving handle is so heavy that it causes the whole handle assembly to move when it's at certain angles. I think I'll try to add some weights 180 degrees from the revolving handle to balance the handle assembly so it doesn't do that.
Ed
I'm not the only one complaining about the wimpy motor. One guy replaced his with a servo motor, not for CNC purposes but just for the increase in power especially at lower RPMs.
There were a few things that I had to fix in order to get it to run smooth and now, other than the wimpy motor, it's running pretty smooth.
One other thing that I don't like about it is the X and Y handles. They have a revolving handle that's nice and smooth but the revolving handle is so heavy that it causes the whole handle assembly to move when it's at certain angles. I think I'll try to add some weights 180 degrees from the revolving handle to balance the handle assembly so it doesn't do that.
Ed