Small cnc lathe turning 6061 aluminium, I try to get chips with carbide insert for aluminium

In a comment to the part 1 video, it was suggested to try 1200 rpm to get 6061 to chip. This seemed very strange, but thought I would give it a try at 1000 rpm which maximum speed in low range. See how it works at the larger diameter and then fails to chip as the diameter decreases. Perhaps 1200 would have been a little better, I don't know. Surface cutting speed for aluminium puts the required rpm for carbide inserts at above 3000 rpm. 3000rpm is my maximum speed in high range and the spindle motor most certainly does not have the horse power to take cuts and feeds required to get 6061 to chip with these inserts for aluminium.

[KravchenkoAudioPerth]

Now all you need is a little fish and you are set!

[aly-tek]

It would be best with constant surface speed but as you have a low and high gear I'll assume your machine doesn't have that option?

[er.hamed]

Very good, but too much feed puts a lot of pressure on the machine