LowRider extended Z axis

LowRider CNC Advice
1

Hey folks, I’m considering building a LowRider v4 mostly for use as an automated flattening sled for woodworking, and maybe for sheet-size cutting tasks later. Clearly an appropriately scaled LowRider is quite capable at the latter, but the 4" of Z travel that the stock LowRider is designed for could be a limiting factor down the line.

If I’m reading the drawings correctly, it seems like Z-travel range is just limited by the lead screw length, the linear slides and the YZ block’s supporting height.

Has anyone tried building a 6" or 8" extended-Z lowrider? Or is this obviously a terrible idea for reasons I’m missing.

2

The ends of the gantry have hard stops to limit Z, its not the lead screws.

There are versions of LR3 with taller plates, i may still have the files as i had a tall 3, and now i have a regular 4 with stupid long screws.

The gantry gets wobbly as you go higher, which is why the drop table is the usually recommended route for extra z.

3

Drop down table or raised runners, whatever you can build.