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Question #: 2372

Question: I have a BlackFoot with a 3.25hp Porter Cable router. What is a safe starting IPM to optimize feed rate? How fast do you guys run full depth passes through MDO or MDF?

Current Solution

It is not recommended that standard routers do full depth passes. This is better done with a spindle. For best results with routers, we recommend a depth that equals the cutting diameter of the end mill. The IPM will relate to the chip load of the end mill (look up the formula online and add it here). The IPM will also depend on the end mill diameter, the larger the diameter, the faster the feedrate. A 1/2" end mill can cut about 300-500 ipm where a 1/4" end mill will be able to cut at 80-120 IPM, at a depth equaling the cutter diameter using a router. With a spindle, the same feedrates can be applied, but with more depth per pass. For instance, an MDF full depth cut at 3/4" can be cut at the 100 IPM using a 1/4" cutter.
Here is a basic setup we have for our blackFoot (default setting):
X-Axis
SPI: 914.29
Acc: 400.02
Vel: 5
Y-Axis
SPI: 1422.22
Acc: 400.02
Vel: 5
Z-Axis
SPI: 1600
Acc: 400.02
Vel: 79.98

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