Maximum Feed Rates

1

I’ve been told by Tech Support that the maximum feed rate for a Benchtop Pro w/nema 23 is 200ips and a Pro 4824 nema 23 is 250ips.

We have many bits that specify higher feed rates … what is the recommended resolution to this issue?

If we shouldn’t exceed a certain feed rate, shouldn’t CNC12 impose this limit?

2

Run slower rpm on your spindle. Match up your spindle rpm to the feed rate you can reach. Cutters do not have to run at RPM max’d out.

Provide some example cutters and can give you some direct examples

3

WoodPeckers

HUHAO 3PCS CNC Router Bit 6mm Shank Carbide Engraving V Groove Cutting Bit 2 Flute 15 Degree 0.3mm Tip CNC Engraving Bits for Woodworking Steel Brass MDF - Amazon.com

Thats just a couple that we have that recommend feedrates about the machines limit

4

I did not see any recommended feed rate at those links.

You need this

Feed Rate Formula

Feed Rate=RPM X Number of Flutes X Chip Load

Feed Rate (IPM) =

Spindle Speed (RPM) × Flutes × Feed per Tooth (inches/tooth)

Example

•	RPM = 18,000

•	Flutes = 2

•	Chip load = 0.005”

18,000 X 2 X 0.005 = 180 IPM

You could use that for the 3/8” compression or the ball nose…assuming you are cutting wood.

It’s good to understand the concept of chip load. It is a key component to getting good feed rates and good cutting.

Also learn about Surface Feet Per Minute (SFM) or also known as cutting speed for materials. Then how cutter diameter and spindle RPM impact the SFM you are cutting at.

There is a lot that goes into getting the right spindle RPM, SFM, and feed rate IPM (inches per minute)

For your skinny pointed V cutter if cutting wood you will most likely run it at the max spindle rpm, because with the tiny pointed diameter of the tip you are running a very low surface feet per minute and the chip load of .0015” to .002”.