Feed Rate Capabilites of small machines

[Ernie Martinez]

I'd like to here from folks with machines similar to mine, benchtop, 2 HP spindle type machines. I'd like to know what your maximum feed rates would be to create a pocket tool path with 2" high letters, .250" deep pocket. Pocket is 20" x 8". I'm only interested in the Clearing Toolpath (I'm assuming you have VCarve Pro or Aspire). As an example the words are "Charlie Brown" with the following:

.75" Red Oak
.250" 1 flute Carbide flat bottom end mill
.125" pass depth.
.005 Chip Load (avg for red oak)

I'm looking for the maximum rate your machine can effectively cut without diminishing cut quality, or going beyond the capabilities of the machine.

My max is around 75 IPM which brings my RPM down to about 13000. I was trying 150 IPM at 18000 RPM and it would skip pulses in Y and screw up the job.

[Nick Michalares]

I don't know that much about feed rates, however I have had excellent results with help from hartlauer_bits.com. Particularly the ONSRUD catalog section, or just call them up and ask. Those guys know lots more about bits than I do after over 40 years of engraving!
They may suggest a multi flute bit.

Good luck.

[Ed Harrall]

I'm set at 85ipm
.125 step down
1/4 whiteside 2 flute down spiral
12,000 rpm ( educated guess running a variable speed router

[Ernie Martinez]

Thanks, this is the kind of info I was looking for. Can you tell me the hp of your spindle,and what kind of motors you are using , stepper or servo, size etc.

Thanks again

[Ed Harrall]

Bosch Variable Trim Router and stepper motors

[Russ D Wood]

What did the 'chips' feel like! Were they cool or warm, when through cutting was the router bit cool or warm to the touch. Cool bit, warm chips is what you want. You want the heat to follow the chips and evacuate the cut leaving the bit cool and clean cutting. Russ