Re: [CAD_CAM_EDM_DRO] NEMA 34 motor mounting question

Hi Hans,

The "slop" is to allow minor adjustment of position. The face of the
motor "registers" with it's mount, which usually has a mating hole in
it. In a pinch, use four flat washers! Not the best idea, but worked
for me on a rotary table (NEMA #23) for quite a while with MaxNC's
motor. I'm currently using a SanyoDenki, which FITS the CNC mount on
the Sherline rotary table.

Alan KM6VV


Hans Wedemeyer wrote:

>
> I about to mount a NEMA 34 motor, it has a square front plate with four equally space mounting holes.
> The hole diameter is 0.218 which seems sloppy for 10-32 and too tight for 12-32.
> I feel like I should be using 12-32.
> Is it normal to expect the end user to drill these mounting hole to suit !
>
> Next question:
> The front mounting plate is not complete flat, it has a raised portion (0.06") and round (2.872 diameter) .
> When I mount this to a plate I will have to remove that same amount of metal ( and a little extra) to ensure the motor is bolted flat to the mounting plate.
>
> What is the purpose of round raised portion !
> To me it would be better if front was flat ?
> I expect there is a good reason for this strange arrangement.... May be to make more work for machine shops !
>
> Thanks for any help...
> Hans W
>