ER32 Collet Chuck for Proxxon PD 400

[Wongster]

Dave,

I've 2 speed settings for the auto feed; 0.07mm/rev and 0.14mm/rev. At 160 rpm with 0.07mm/rev, I can hear some "grinding" sound during the cut. I hope that's normal.

If I keep all settings unchanged but increase the depth, will I have problem(s)?

How would you do this?

Regards,
Wong