Bed Leveling on M3

[coolnamesalltaken]

I've been trying for a few days now to get circuit board engraving working on my M3, but have been unable to get consistent results with a v-bit, since some cuts are way too deep and others are too shallow.  I've tried milling a pocket on my waste board using a 2D adaptive clear or a facing operation, but both of those have ended up rather uneven.  I most recently tried a facing operation and realized there are ridges that form between each pass, even when I overlap the passes.  I'm theorizing that the spindle is at an angle relative to the bed.  Is there a standard procedure for fixing this issue on the M3?

Thanks!

[Derek the Admin]

You are correct. The ridges that you describe are because the router isn't plumb. I'd suggest putting a speed square near the router and look from both the front and the side. If it's angled side to side that will take "swinging open" the Z to access the screws to adjust it. If its nodding front or read then you can loosen the X rail and tilt it forward or back as needed.

[coolnamesalltaken]

Thanks for the reply! What exactly do you mean by "swinging open" the Z?

[Derek the Admin]

You can loosen the tightening screws on on the top and bottom rod supports on one side and then pull out the linear rod. From there it will "swing open." That's one way to do it without completely taking the Z off.

[Bruce]

I've been working on a motor mount that would be adjustable from the front. Here is a Fusion 360 link: a360.co/2MhguVE
The back plate is the Carve King Z axis mounting plate. Four holes go through the front to the back to mount the clamp to the Z axis. The hole perpendicular in the front clamps the motor.
Pretty simple design. Any drawbacks to something like this?

[Bubba's Workshop]

I was just about to ask about this. I see that I am .50mm higher on the left side of the table on my M3. I will have to try this method out. Thanks