Re: ER-16 vs WW spindle for Taig?


Robin S. wrote:

The question du jour: Why do you need a .003" EM?

Because a 300 dpi image dictates pels of .0033 inches, and the nearest
cutting
bit to that is .003 inches

More importantly, why are you trying to run it on a Taig?

Because it is what I got. I had originally set out simply to use it as
a general purpose mill for my own R&D, but then I happened across a
possible customer who wanted me to try to do this, if achievale would
be be nice work if I can get it.

I'm not saying you won't be successful. However, chipload versus the minimum
resolution of your machine becomes exceptionally important. For instance, a
200 step/rev stepper motor driving a 20 TPI leadscrew gives you
.00025"/step. This may very well exceed your endmill's maximum chipload.
Also, any mechanical play in your machine could easily break the cutter.

Excellent point. I had calibrated the axes of my machine using EMC2 on
Ubuntu-magma real-time Linux kernel controlling Xylotex drive
circuitry, and it turns out that I have 32767 step per inch resolution.


I'm wondering if there's an easier way?

I am, too.

Robin

.

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