Bed/Bed Frame not level

[brvdboss]

@ITmaze

As my first fixture, I’ve managed to come up with a combination of a vise and a chuck to center round stock in the same location and I’m now thinking in terms of work holding platforms, or fixture plates, that are attached to the platform in a repeatable way.

I don’t know if you saw this thread about it. I especially like the idea of @sdj544 of just screwing on a piece and then mill the fixture out of it. Easy to reuse afterwards as well and definitely aligned with your machine.

CNC Repeatable Origin Guide

Nice writeup. You can use a piece of plywood or a couple of pieces of wood, and then mill it. Then you don’t have to bother printing anything and your origin will be exact and your axis will be perfectly parallel to your machine’s axis - without having to do any math. [ccabf253c9f1b577e6aa3f4296466f80698939af_2_281x500] I have a couple different sizes so I can always keep my work near the center of the bed. -S

@ITmaze

I have been contemplating your use of the spoil board as a base, but as you point out, MDF warps over time. I figured that if I have the platform actually flat, then my job of creating fixture plates becomes much simpler, regardless of which material I use.

The bottom plate is basically still as flat as on day one. It’s just the one the heated bed is attached to that warps at the corners at high Temps. (and starts to stay that way now). For the other platforms it is still good. The machine is in my basement with a max temp deviation of 4 degrees summer to winter and ventilation that makes manages the relative humidity as well.
So I am on the lookout for material ideas for the printbed plate.
(and I did do the linear guide mod that helps with the weight and especially cnc jobs)

@ITmaze

I do owe you a debt of gratitude for voicing the issue and formulating a plan. It’s been marvelous, so thank you!

I am just glad it’s of some help and I am looking forward to see what you come up with