How to determine the number of required passes.

When using a 3mm drill, I usually set the passes at 1.5 or 1.7mm with MDF, so I take the half of the diameter of the milling drill.
But it seems the tool hasn't any issues with 3 or 4mm passes, so what's the rule I should apply?
I guess this rule change for different material such as hardwood, plastic or aluminium.
Eurotools-24 G-500 & custom-made aluminium table
Kress 800
TB6560 4V3, UC100, UCCNC

Hi Denus,
I don't know if you can extract information from the list of parameters in the cnc-wiki, but there are values of 2mm diameter an 2 mm per pass at speeds of 10mm/sec listed: http://cnc-wiki.de/Betrieb/Fraesparameter
In my tests I did use at lead the diameter of the drill for each pass.
I guess this rule change for different material such as hardwood, plastic or aluminium.
That's for sure! It depends mostly on the hardness and if a material melts / burns.
Daniel
-----

Thanks a lot!
Eurotools-24 G-500 & custom-made aluminium table
Kress 800
TB6560 4V3, UC100, UCCNC
- 44 Foren
- 7,436 Themen
- 63.4 K Beiträge
- 7 Online
- 26.5 K Mitglieder