Steel tube build

[Boyan Silyavski]

That's a crazy way to work. So your cutting wood at 1.5mtr/min when you could and should be cutting at 7mtr/min and causing excess tool wear just because you don't want to change the tool one time and do a finish pass. . . .A manual tool change takes 30seconds.!!

I cut aluminium faster than 1500mmm/min.!

I guess realy depends on what kind of job i am doing. When i cut general stuff and cleaning passes yes i cut at 7-10k mm min, but when i am fabricating for example the music instruments i am making i keep slow, because going fast chips edges from time to time and is very difficult to repair if at all, as size must be correct. So i dont speed then and cut at finishing speeds. As at the end of 3-4 days work if i have chipped say every five from 100 pieces it would be like 50 pieces to repair. Which is tremendous amount of time lost and material, if its unrepairable.

Same with the signs i make. I aim at perfect cut of Plexiglass or Dibond. The other day i cut PLexiglass and made a video, even wanted to post it here. 18k. spindle speed and 70 ipm/ at 0.5mm deep using 1/8 single flute. I played like 3 hours to find the perfect ratio. basically went to the conclusion that could go 2 times as fast and 3 times as deep, but from time to time there was crap on the bit and i had to be constantly there. Having in mind had to cut 8 hours and the material is 100e/m2 i have decided to go at said speeds and air blow from the fog mister and that let me have the job unattended. So simple.


PS i cut aluminum at 2k mm min also

[JAZZCNC]

I guess realy depends on what kind of job i am doing. When i cut general stuff and cleaning passes yes i cut at 7-10k mm min, but when i am fabricating for example the music instruments i am making i keep slow, because going fast chips edges from time to time and is very difficult to repair if at all, as size must be correct. So i dont speed then and cut at finishing speeds. As at the end of 3-4 days work if i have chipped say every five from 100 pieces it would be like 50 pieces to repair. Which is tremendous amount of time lost and material, if its unrepairable.

Yes exactly, which was my point. That's the material dictating the feeds not you deciding to go slow. I'm sure if you could with same finish etc go faster, then you would.

End of the day it's mostly the material and tools that dictate the feeds n speeds required and not something the machine should dictate because it's under specified or poorly designed. Like wise the user's choice in feeds n speeds is limited to a small range if they want to cut correctly and not destroy tools or materials.