No, as I understand it, to reduce chipload you would reduce RPM (but that's wrong? see below) --- managed to melt a glob of HDPE onto a 1/8" endmill not thinking about that and using the 1/4" feeds and speeds.
We do have one pair of data points for 1/8 vice 1/4:
- Depth: 0.762 mm
- Speed: 17250 RPM
- Feed: 762mm/min
- Plunge: 254mm/min
- 1/4″ #201 or #202
- Depth: 0.76 mm
- Speed: 17500
- Feed: 762
- Plunge: 254
Hmm, never noticed that they are essentially the same. I'll have to dig out my notes on the 1/8″ cutting --- used the same file, so pretty sure I just reduced the RPM.
@ApolloCrowe any possibility of resolving all this and getting an official feed / speed chart to support Carbide 3D selling the 1/8″ precision collet for the Dewalt?
FWIW, I've always wanted to see a CAM feed rate tool which was dynamic and physics-based, and which could adjust spindle RPM on the fly for machines such as the Nomad, calculating material remaining with each spindle revolution, dimensions and heat load of each estimated chip, based on the content of a G-code file.
Obviously need to research and work up a basic understanding of this ex nihilo. Here's a start:
The formula to calculate your chipload is: Feedrate / (RPM × # of flutes). To increase chipload: increase feedrate, decrease RPM, change to an endmill with fewer flutes. To decrease: decrease feedrate, increase RPM, change to an endmill with more flutes.*