CNC Bed Leveling

Snapmaker 2.0
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So last fall (2020) i asked about milling the surface of the CNC board to make it level since there is no way to level the bed otherwise. Snapmaker replied not to mill the waste board as that would void any warranty on the machine and they were working a solution for CNC. Its been just about a year and I could not find anything. Can someone from snapmaker make an official announcement about how to level a CNC waste board? or when the solution is coming?

Additionally, How are we expected to use the rotary module with an unleveled bed?

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Have you tried placing a board on top of the waste board, and milling it to fit your project pieces? That’s what CNC Mill shops normally do.

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Never heard that they said that. That’s just stupid. There’s nothing that milling your wasteboard would do that could possibly cause any more damage than any other cnc operation. The correct solution for cnc (on any machine) as @CNC-Maker is to either mill the bed or mill another piece of sacrificial board.
First step before milling though is to tram to make sure your x-axis is parallel to your board.
-S

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I may have found a simple and definitive solution to CNC bed leveling, not sure if it applies to everyone. Fixed the problem that my CNC bed was 2mm “lower” on the left than on the right. (After double-checking correct SM A350T assembly etc.)

The focus in this discussion (and other threads) has been the bed itself, but what about the left-right leveling of the X-axis linear module ? It’s the relative alignment between the X linear module and the CNC bed that matters. The X-axis linear module could be non-level due to play in its bolt attachments to the 2 Y-axis verticals and/or the precise relative positioning up/down of the 2 Y Linear Modules.

So I tried…

  1. remove the tool head
  2. slightly loosen the X-axis module mounting bolts at both ends
  3. place an absolutely straight spacer on the CNC bed (to prevent the toolholder bracket from hitting the CNC bed)
  4. slowly but firmly lower X linear module down onto the spacer
  5. re-tighten the X-axis linear module mounting bolts

Result: total cure. Can’t say how much the issue was any play in the X-axis linear module mounting bolts and/or precise positioning up/down of the 2 Y Linear Modules, but problem solved, without any extra work-around such as milling a sacrificial board or whatever.

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As I said in my reply:

Search for “tramming”

-S