SLA Clearance Gauge

thingiverse

Overview A clearance gauge designed to measure excess material on SLA prints resulting from toolpath width and laser spread in resin is intended. The gauge consists of a base and a top, with the base marked at 1 mm intervals and the top featuring a vernier scale with 0.05 mm increments. Operation The taper in the channel between top and base is 5 mm / 100 mm, meaning that 1 mm displacement measured on the vernier scale represents 0.05 mm excess material on the taper. Note: This is the total excess material on both mating faces, so excess toolpath width equals half the measured value. Quick Guide 1. Print ClearanceGauge.stl on a calibrated printer, recommending alignment of the long dimension along Z in the printer. 2. Clean and cure the print for ease of use. 3. Slide parts together and gently push the scale toward zero until the taper resists. 4. Take measurement from Vernier Scale - this is the "Displacement". 5. Calculate excess material due to toolpath thickness: 0.05 * Displacement / 2 6. Optionally, test by editing ClearanceVerification.scad to modify the variable "clearance" to your measured value, then render and print a test piece.