I could have sworn you made a topic somewhere about speeds and feeds, but I can’t find it, so I’ll reply directly to this topic since it’s in regards to cutting polycarbonate sheet.
I’ve just had to recalibrate my accelerations a bit to cut 1.2mm polycarbonate sheet, I should really save the changes in the g-code itself as the cuts are fairly imprecise… but I’ve been cutting today with this settings;
1.5mm DOC (so as to make sure the bit goes all the way through) I’m still scarring the table, but the scars are all repeated, so it’s no biggy.
Taken from the LCD itself;
1000mA Driver current all 5 steppers
Accelerations
100 Print Accel
3000 Retract Accel
1000 Travel Accel (I think this is the only important one in regards to the LR3)
Max Feed Rate
X 10000
Y 10000
z 800
Max Acceleration
X 600
Y 600
Z 800
In ESTLCam I’m cutting at 11000mm/m on the X+Y and 800mm/m on the Z
I’m using a 3.175mm Two Flute bit with a 45° Plunge Angle
Helical drill for my centre holes (7.2mm)
Speed 6 on the RoutER11
it helps having a sharp bit, the first bit I was using was a little blunt and it was popping out of the cut.
and here’s a video;
I’m guessing the 11000mm/m in ESTLCam may not actually be the speed of the cut due to the max speed being set at 10000mm/m in Marlin.
Big changes from last time has been cable/vacuum management, only the stepper motor cable is travelling along the gantry now, the vacuum being set up in the ceiling.
It’s cold here atm, so I’m wondering if the max current will also be temperature/season dependant.