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Modifications to the feed drive system on a lathe.

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hanermo:
Infinitely variable Very Very powerful feeds and most importantly huge spindle torque are probably the *best feature* of my CNC lathe conversion.

I commonly run my lathe as semi-manual with an MPG and adjustable feeds and speeds via 2 override industrial potentiometers for spindle speed and feed speeds.
Imho the cnc conversion is *vastly* better than my previous -excellent-, manual-only lathe with power feeds.

The infinitely variable spindle speed with huge torque was to my great surprise vastly better than the previous, already very good, mechanical multi-belt and backgear system.
In practice, I learned that often much higher spindle speeds, 2-3x, and more aggressive cutting, upto 3.5 mm depth of cut on 140 mm D tool steel, at 700 rpm, produced outstanding results, very quickly.

Lessons learned:
Huge spindle torque with variable rpm is a major, major, game changer.
About 3x the productivity, with 2x the quality, and 1/2 the work.

Analog controls via potentiometers or mpgs for feeds is amazingly useful and important.

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