The other thing is that it's worth trying to find the optimal spindle motor spin speed and tool travel speed for each type of board material and tool type.
Yes, that info is coded into ProCAM. You just select the bit you're using from the drop-down menu. You don't have to manually punch in any feeds/speeds.
If you're curious, here are the current parameters:
Square profile7-mil: 20 IPM (inches/minute)
10-mil: 40 IPM
30-mil: 150 IPM
15 deg. fluted profile (these last significantly longer than the above and go much faster given their size).
3.9-mil: 7 IPM
5-mil: 40 IPM
7-mil: 85 IPM (this is what you see in the video)
60 deg. and 90 deg. engraver13 IPM - slowest but cheapest. 120 USD for 10. Last longest. Bottoms out at 8-mil space though.
T-Tech gave me this data many years ago although I was scared away by the very high tool travel speeds they were suggesting. A case of my ignorance of what is OK against what seems 'not OK' when you watch the machine going that fast. So I tend to run my machine slower. Also it's worth having a fast/variable motor speed. One limitation of my old machine is that it is stuck at 23k rpm max.
Just one tip if I may - and this might not be your problem but make sure you're not going
too slow in terms of feed rate, because there comes a point where you're not creating chips with each rotation and instead rubbing (burnishing) the end mill teeth wearing them down faster. This could cause you to break bits at a higher frequency than if you went to a higher feed rate.
Also, if you want to produce some nice marketing samples then try doing some pretty looking RF filters on Rogers 4003C as it looks very professional once milled. The white substrate against the clean copper looks great especially if the cuts are clean. I often feel a bit sad when soldering parts to the board because it spoils the beauty of a freshly milled board on 4003C
I did this with Rogers 4350 to show a client! It does look pretty. It was all done with the 3.9-mil bit. I wish I could show it, but it's covered under NDA. If you have some small designs you don't mind me milling and posting pictures of on here, you can message me or get in touch through the contact form at
www.zippyrobotics.com and I'll do a test. Probably have to wait a week or so because I'm super busy with package testing right now, but I'd get to it. I would need Gerbers or preferably the project file so I can tweak the Gerber output if necessary.