Reply by DS

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Posted on CNC Routers

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2916 posts in 2413 days

#1 posted 10-19-2012 09:41 PM

As far as spindles are concerned, they are mostly reliable. A 220V to 440V 3ph spindle is a workhorse. They are definately more reliable than a router motor. I’m not sure they are much quieter than a router, though. (The motors are quieter, but the routing noise is substantial either way.)

Usually, as long as you don’t “crash” the head, the spindle will last a really long time. Crashing the head just means that it is directed into something it shouldn’t, like trying to instantly go minus 4 inches into the table, or accidentally trying to cut through the hardened steel holding clamps on a part. This will destroy a spindle pretty fast. It will definately wreck the tooling. Typically, though, under normal use, a spindle will last as long as the rest of the machine.

You can probably write a simple script to check the g-code for things that can crash the head. At least have the students submit thier g-code for review before they get approval to run it on the machine. That is some protection at least. I would expect you will probably crash the head at least once within the first six months. We’re all human after all. After you learn what to look for and be wary of, you’ll likely not have that issue any more. (It is a LEARNING environment after all.)

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

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