Milling on Brass

[john dakinParticipant @johndakin59277]

Hi, I need to profile cut out a 100mm disc out of 3mm thick engraving brass on a small cnc machine, I have used cambam to design the disc and use mach3 for machine control, my question is that when I run the program its making too many cuts to get through the stock, I am using a 3mm 2 flute mill cutter, considering that the thickness is only 3mm thick would it be safe and ok to just take 3 cuts to go through to the target depth of 3.75mm, I am new to all this so any advice on feeds and speeds and types of milling cutters best for this would be welcome.

[john dakinParticipant @johndakin59277]

[Russell EberhardtParticipant @russelleberhardt48058]

Can't you tell Cambam what depth of cut to use?

For this sort of thing I just draw the toolpath I want in Draftsight, save the file as a dfx then translate it to gcode with DXF2GCODE, telling the latter what depth of cut to use for each pass. All free software and easy to use.

Russell

[Anonymous]

Three passes should be fine. What I'd do is create a spiral toolpath that kept going round with a continous cut depth of, say, 1mm rather than generate separate constant depth passes. That saves having to ramp, or spiral, in on each pass.

Andrew

[john dakinParticipant @johndakin59277]

Thanks very much for the info guys, ill give it a try

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