Set workpiece zero to machine bed (=to vacuum table, trying to save vacuum table)

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey gander,

@gander

The bottom line is I want to try and insure that my vacuum board never gets cut, if possible. It’d be more traumatic than swapping out throwaway pieces of MDF.

it is not possible to set a fixed minimum Z height, with no CNC machine, because it depends on the length of the bit, and where you probe Z. But if you always set your workpieze zero coordinate to the bottom of your virtual 3D model, you always probe workpiece zero from the machine bed, which would be the vacuum bed here (flip XÝZ touch plate over in this case, see XYZ touch plate installation & instruction video). In this case the bit end will not go lower than the vacuum plate.

@Aiph5u

@Segwayne

Followup question. If I wanted to set the Zero Height from the top of the wasteboard (aka “bottom of the workpiece”) do I do that using the Onefinity probe

In this case you use the XYZ touch plate upside down, on machine bed. Thickness of the touch plate will be subtracted automatically.

@Aiph5u

Support videos:

• How to attach and use the XYZ Touch Plate
• Manually Setting X,Y,Z Zero on the Onefinity CNC
• How to Probe a V-Bit on the Onefinity CNC
• Onefinity Touch Probe Fine Tuning

Accessories

• Onefinity 3-Axis Touch Probe
• Replacement cable (5 or 8 feet)

For the protocol: Changed topic title and category accordingly (instead of “Do not pass Z value”, simply “Probe Z from bottom of workpiece”. Category: Topic applies to all types fo CNC machines.)

Welcome to the forum!