Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

[Clive S]

1000/S ? Do you mean 1000mm/min

[JOGARA]

Doh

Of course :p


Also, not 100% on the 1mm and 2mm. Wanted the single flutes but having to wait. Might as well try these.

[JOGARA]

Really struggling with the feeds and speeds for this 3 flute roughing bit.

Works fine for a few seconds then starts to chatter.

Guessing it is also a cooling problem?
Got the mister blowing a lot of air on it, also tried with a bit of water but same problem.

[Zeeflyboy]

I have gummed up the roughing bits on more than one occasion when milling ecocast plate... to the extent that I actually had to dissolve the aluminium to get it off the cutters. What feeds/speeds and DoC/step over have you been trying?

Like I said they are definitely far more sensitive to incorrect speeds and feeds than single or 2 flute, proper coolant/lubrication would widen your envelope significantly.

[JOGARA]

I have gummed up the roughing bits on more than one occasion when milling ecocast plate... to the extent that I actually had to dissolve the aluminium to get it off the cutters. What feeds/speeds and DoC/step over have you been trying?

Like I said they are definitely far more sensitive to incorrect speeds and feeds than single or 2 flute, proper coolant/lubrication would widen your envelope significantly.

Tried 500 and 1000 mm/m at their recommendation of 13000 RPM.
Only tried 2mm DoC.
Not sure what to try next.

[JOGARA]

removed......

[JOGARA]

So it looks like heavy mist/flood works really well.

The finish quality is really good too.


Having some odd problem where the Gcode is saying helical down, but Mach3 isn't doing it. It is still running the rest of the code as it should be but ignores Z.