Update on Pocket NC v2-50 Threadmilling

After machining a fair number of parts with threads, I’ve tweaked my thread milling feeds and speeds to both go a little bit faster, give a more reasonable fit, and remove the last bit of niggling interference with the M2.5 recipe.

I’ll list the changes here, and have updated the original recipe

Old New
Chamfer Width 0.10mm 0.05mm
M3 Pitch Diameter Offset 0.538mm 0.568mm
M3 Stepovers 10 6
M3 Repeat Passes NO YES
M3 Lead To Center NO YES
M2.5 Pitch Diameter Offset 0.430mm 0.480mm
M2.5 Stock to Leave 0.0mm -0.02mm
M2.5 Stepovers 7 4
M2.5 Repeat Passes NO YES
M2.5 Lead To Center NO YES

Notably, the “Lead To Center” option found on the linking tab is what prevents the M2.5 threads from rubbing when inserting in later passes.  Thanks to Quincy Jones from Implemented Robotics for that tip over in the mjbots discord!

 

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