Originally Posted by fpworks  ......Even with an actual 3.75 hp, I would still only expect ~50-60% load at that cut, unless 4500 rpm takes it way out of the motor's power band......
(btw, did Haas supply you with a graph illustrating power/torque vs speed at duration?) |
No I do not have a torque curve for the machine; I have no idea whether Haas has them.
I am well away from the region of maximum torque; this is at 1300rpm. The problem is that trying to run at maximum torque means going slower overall because the ipm has to be reduced. I am running at just over .003" per tooth on a two flute, if I drop the speed I have to drop the feed because the tooth load goes up quicker than the torque, and if I increase the speed I have to drop the feed because the torque falls off badly.
I am not saying this is good bad or indifferent, and I am not comparing it with other machines. As I say in the first post my intent is to give some idea of what the machine can do because people have posted queries.
If I really needed to hog these things out quicker I would buy a VF3 with a 10,000rpm spindle, but I can almost get two TM3Ps for the same price and get better productivity for dollar spent.