[mactec54]

i have been waiting for 3 weeks for some DOM tube so i can make outer race spacers and this material still has not shipped yet? prices are a bit out of control on tube and everything else for that matter but it is what it is i guess.

i do have enough finished that i can sort the motor mounting and everything else. this is still in the rough design phase and i still have a few things to sort out but the major stuff i think i have sorted out and did a screen grab to post for the basic plan.

since i would like to do rigid tapping this 3 phase motor needs some feed back so coming up with a way to get an encoder on the motor was a bit of a thinking process but i think i have a good plan, the motor has a plastic fan for cooling on the back side of the shaft so the plan is to attach an encoder directly to the shaft and loose the plastic fan altogether. these motors cool ok at high speeds but when you run slower the cooling drops off. so to make it better at all speeds the plan is to heatsink the motor and use 2 DC fans to cool everything. most likely they will just run all the time when the machine is running.

i have a simple belt tension system worked out and now know what length of belt i need. the one belt i have is too short but getting one that will work is not a problem.

this is still a work in progress but the screen grab explains things better than i can i think

Attachment 474414

Why put the Encoder on the motor, the spindle is the best place to add an Encoder, usually just one 4"fan is more than enough to replace the original fan, here is an Encoder and fan I did on a Bridgeport, the Horizontal build also has an Encoder on the Spindle and works very well.