Tramming the MPCNC

I’ve been trying to surface my spoilboard, and have discovered that I also need to tram the machinge, since my spindle is not perpendicular to the board. It’s hard to see in the image, but there’re high spots across the spoilboard after running my surface bit in two shallow (0,5 mm) passes.

I can’t seem to figure out, which bolts I should adjust to tram the machine.

Can you guys help me out?

Shim the router, don’t mess with the bolts, they square the tubes. Cut up a soda can for shim stock.


So, just place some shims between the tool mount and the router?


Yes, you place these shims between the router casing and the mount surfaces.

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Is this a good solution for the lowrider too? At least the idea of simply shimming the tool as opposed to finicking with other bolts within reason? I’ve been looking into how to dial in my lowrider but haven’t come across specific posts on it. If not I’ll keep looking through the forums or eventually start a post.

If the lowrider isn’t trammed automatically, then you have something twisted. The router mount is the router, so that’s going to be in line with the motor.

Ok that makes sense, I can’t seem to get rid of the gantry leaning towards the side with the stepper on it and have some sort of other underlying issue. I don’t want to take over this thread since my question about a different machine. I’ll keep searching through lowrider threads for more info.

The only way I can see this happening is if your z mount parts are unevenly tensioned, by a lot.