DIY spindle design

[bogflap]

Hi Jeremy

My interest in your thread is for a high speed spindle for isolation routing of printed circuit boards. This as far as I can see will only require bearings that will need to cope with very small axial and radial forces. So the question is has anybody tried attaching say an ER16 collet holder straight to the type of motor that you are using i.e. an r/c model outrunner/inrunner. I assume that these motors are intended to attach straight to a aero prop and so the motors will have fairly robust bearings in the first place. I assume they will be thrust bearings (axial loads) mainly because an aero prop 'pulls' itself through the air. However I assume that there must be some radial loading, which is the issue that plays on my mind at the moment. Has anyone tried this or has anyone any knowledge of what kind of bearings these motors contain.

[templecorran]

Forgive me if this question is off topic.

Jeremy, that is a great piece of work.
You mentioned that you used the Shumaker suggested servo tester to get the pulses needed to get the motor going.

My question is: Does anyone have experience of driving this type of motor control from the MACH3 software suite?
I know from reading the MACH3 manual that PWM speed control is covered on page 5-7 & 5-17, but has anyone actually done it with a DC brushless motor?

Here's hoping!!

John

[templecorran]

Sorry, I just thought to ask you if you have had any machine time with this new spindle yet?

Most important to me is: how noisy is it?

cheers
John