Hello ppl.I really hope someone can explain this issue to me.I have some problems with my two sided project. Am using an L reference point on my cnc.Its my work 0 pont.Its calibrated.For my two sided job i use a piece that i already cut out,so the dimensions on the piece is spot on,i checked with my caliper.Iam using aspire vectric software for my jobs.The first toolpath on my piece is a 4,5mm cut and the second is a r6 roundover.Than i flip my project and do a 4,5mm cut and a r6 roundover,than i cut the project thru and thats when the problem is happening.The final cut is off 1mm on the side where i fliped the material,so its like when i flip the material on the y direction i have an error on the y side,when i flip on the x direction i have an error on the x side.(already tried to cut just a squiare, half depth on the one side and half on the other side with the same off results)The machine is calibrated good, i always have a good final dimensions on my projects. I read about this two sided machining tip to use pre drilled dowel pins,but i really dont understand how the L reference cant work cause its calibrated...please some one can help me with this cause i cant found why my metod cant work.I cant see the logic behind my issue.Thanks so much ppl.
any error in the size of the workpiece is doubled when you flip it like that. The best way to do 2 sided work is to use alignment pins in the middle of the work. 1 bottom one top, so it flips left to right. create a drawing with the pins centered on the workpiece but outside the work itself, in the waste of the material. create gcode to drill the 2 holes in the spoilboard. I use the bottom hole as the 0,0,0 point for both sides of the work. now you have 2 holes, fasten the material over the holes create gcode to drill the holes in the material, and gcode to cut side 1 and run it. lift the material, insert pins, flip, place material on the spoilboard with the pins aligning it, clamp it down. cut side 2 aha, here's a video that shows how to do it
