It doesnt sound bad at all. No chatter.I think my rpm is 12,000, it changed with the new motor. The chips are more like thin strands then chips. I get about 400 inches of travel out of a 3/16 3flute with TAILN coating. When my motor cuts off, its to hot to touch. Also I can hear it cycle some of the power to it during my programs. Ive had my Tiag mill for a while, it came with the 1/8 hp motor. The 1/4 was much needed and I'm happy with the upgrade. If I hade to do anything softer like plastic or wax I'd probaly switch to the 1/8 motor. My average program is 27 min. with the 1/4motor and 45ish with the 1/8. I'm cutting through .5in. of 6061 in 3 passes at .167DOC and for my through holes because of counter sinking I've gone as deep as .3 at 2IPM. I do a little design in the face of the block at .1doc at 6IPM.Ive tried to go faster with bigger end mills(.25) and I pulled down the z axis tower. These seem to be the fastest the mill wants to run for my aplication. I'm very happy with the taig mill, it seems to be almost bullet proof. However I wish the 1/4 motor didnt over heat because I would like to try some steel parts, and the programs would be hours long. Andrew  |