So major workshop changes are complete (ceiling height increase, insulation, venting, sheathing, and heating) so back to some projects but woot woot! heated workspace in the frozen north!
Trying my hand/cnc at crib board creation.
I drafted the design for a friend and tried out some tool changes in the gcode with some success. I’ve decided that yes I can do the tool changes but a number of items for me at least made it make more sense to just break the job up into segments as opposed to one big long program. I also saw Ryan post about almost never doing tool changes and with that, I may abandon the idea.
What I struggled with most and realized immediately after being prompted for the first tool change was how would I get my bit back to the exact same z-height? I know it’s a gcode line item but for the tool change despite what I expected the bit lifted up off the work piece probably the 5mm I ask it to for movement clearnace. Without a collar on the bit, I was guessing putting it back and… yeah, air milling when I resumed.
Not all was lost as you can see but rather than have all of it run off one cnc program, I’m going to break the job up by tool, and simply return to origin in the settings, change the tool, start new program from the same origin. This way I can manually home my z-axis, so lets say x0,y0,z-2, reset the origin on program start to be my x0y0z0 once more and on I go, new tool in the works.
The last part here is is there any way around the burning in the hole drillings? I needed 361 (yeah I know I only have 360… holes) but this in in maple and it smokes on every single hole. I used a conventional twist drill bit for the holes but at the rpms for the spindle, there’s not much to be done? For the hold down pilot holes my cordless drill was doing the same at ~300rpm? so maybe it’s a lost cause. I used the slowest router setting, and plunged each 12mm deep hole in a single pass quickish at 5mm/s for z plunge. The drilling was no problem other than the smoke. Not sure the edge on the bit will hold up but it did one test board just fine.
Good to back and learning so much.