Hello
I have recently acquired a shopbot and got it going. I am cutting 13/16 diameter holes, 3" deep. Alot of them. I am using a 1/2" x 4 1/2" straight cutter in circle pattern and stepping it down 1/4" at a time. I am only able to run the feedrate at 15 ipm. If I go any faster the bit chatters and ruins the hole. I'm pretty sure it is because it is because the bit is so long and is cutting so far from the collet. I am going to try a spiral upcut and hope that allows me to increase the speed. Any ideas on that?
Also does anyone have any idea if it is possible to increase the collet size to 5/8 or 3/4 so I can use a larger shank?
Last question. My machine has the capability to run 2 routers. I am thinking I can run both of them at the same time and drill 2 holes at once. Is it possible to run both of the z motors with the same input simultaneously?
Thanks