by blarkscnc » Fri Dec 21, 2018 1:59 pm
Hi guys, I've just built a new machine, an openbuilds cbeam with g540. I have treid searching for an answer for some time and I just can't seem to find exactly what I'm after. My question is about the feed rate, I have a stepcraft 2 and have successfully cut alloy at approx 1200mm/min, now when I try the same operation with the cbaem I have to drop the feed override down to 30% which ended up being roughly 360mm/min I know this can't be right as it seems far to low. Cutter is 2 mm single flute spindle is the stepcraft version of the kress or rebranded kress and have it at around 5 on the dial. For reference min is 1= 4000 to max at 6 = 25000 rpm although I'm a little dubious at these figures and speeds but no way to test it really. I did try different speeds and after several broken cutters the above feed gave the best result. I have made a new profile and loaded the mach xml and then changed from there. At a bit of a loss as to what to do, it seems the feed rate is roughly a third of what it should be, in fact 1200 divided by 360 is 3.3 recurring.