Rcnewcomb wrote:What post processor are you using?
Can you ZIP and upload the saved toolpath files?
I am using the following post processor obtained directly from the CNC machine manufacturer: 'Axiom_HHC_CNC_4TH.PP'
Here are my various toolpaths which include a pocket cut and a profile cut.
Rcnewcomb wrote:I noticed a few odd things:
On the pocket toolpath your 1/2" tool is set with a 90% stepover and a pass depth of 0.05", and your pocket is 0.5" which is the same as your bit diameter. The cut depth is 0.35" rather than 0.375". This type of cut is better done with a profile ON the line rather than a pocket. Also, I'd recommend you change the stepover to 40%, otherwise you may have issues on irregular shapes. Also, the pass depth of 0.05" is really shallow. You could probably change that to 0.25" on a 0.5" bit.
Normally I use my 0.5" end mill to hog out material and so that's why I set the stepover to 90%. But as you imply, i did have to set the stepover to 20% to obtain good results when milling the square stock down to round stock. But for this case, I left the stepover at 90% for these rabbits because I expected them to be milled in a single, straight path (if that makes sense). So I do adjust the stepover value depending on the project.
I have had success before on flat "XYZ" projects when using pockets that are the exact width of the tool, so I thought I would chance my luck here too. But even when I tried cutting on the line of a profile line, I had similar results.
Correct, I'm being very conservative and going pretty light on the pass depth because my tailstock will move around if I'm too aggressive on my speed/feed... My tail stock is currently only clamped down; it's not yet bolted down (long story on why).
Great attention to detail! Yes, my cut depth is actually supposed to be set to 0.35" (the one file where the cut depth was set to 0.375 was actually an error that would have removed too much material). When I do the math, I will end up with a final mortise diameter of: 1.4" - (2 x .35") = 0.7"
. This will leave a buffer for glue and spindle alignment when I insert these spindles into the 0.75" tenon holes that I milled into some shelves.
Rcnewcomb wrote:On the profile toolpath the cut dept is correct at 0.375". Even though the tool is set up to do a pass depth of 0.1" it looks like you've changed this in the "Edit Passes" section so it is still taking 7 passes. I saved this using several post processors and I do see the correct degree turns for what you have specified.
Yes, for the reason mentioned above, I chose to overide the cut depth for fear of my endstock shifting.
Lol, it actually never dawned on me to look into the .mmg toolpath file to see what was going on (i'm still new to all of this). So, thank you for helping me to discover that Aspire is limiting the rotations, and that I'm not having a hardware issue. With that being learned, I might just edit the toolpath file to make the 360 degree rotations until I can figure out why Aspire is miscalculating the angles in the toolpath but not when calculating the simulations.
Sorry for the long post.