Bed levelling and retaining blocks for Piranha laser cutters

thingiverse

Set of support blocks for piranha 1060 and similar laser cutters features a slatted bed and tubular sub-bed system. Corner blocks slide into tubes of the sub-bed, secured by 4mm x 20mm screws that expand fins and lock them in place. Centre clamps simply slip onto the sub-bed. You must adjust values in the program and re-run it before use, as supplied .STL is an example only and is extremely unlikely to fit your machine correctly! This design takes two sets of offset values for X and Y, plus an offset matrix for Z heights. "Size_offset" are used to adjust overall spacing of retainer clips, allowing slat table to be larger than sub-bed it's resting on. "Pos_offset" values are used to adjust for slat bed needing to be off-centre from sub-bed to clear machine frame. Z_offsets_grid is a table of values for height adjustment to hold the bed flat and level. Measure relative heights of the bed compared to nozzle of your machine at 6 points (4 corners and middle of each long side), scale them so position with smallest gap is zero, then set offsets for all other positions to positive value indicating how much lower the bed is at that point. When program is run, it will create blocks with more height so bed winds up level. Take extreme care with Z-homing on your machine when first fitting these blocks. If they are printed at incorrect sizes, bed may foul on machine frame and cause damage.