Multi plate approach:
I'm probably missing something very basic about mounting the motors and bearings. My approach is based on NEMA-23's and putting the bearing on the plate that's above the motors. The bearings should be small enough in O.D. to fit inside the bolt pattern on the face of the motor. Drop a few hollow spacers between the motor face and the board above it. Put bolts through the motor face holes, through the spacer, through the plywood, tighten them down.
Plate count:
Bottom plate with tension nuts for the thread rod and the casters on it, nothing else down here - same / same
second plate with electronics on the bottom - you have motors / I run the motor screws into the next plate up (I assume the build plate rests on this one)
third pale - interesting idea - I would mount both the motors and bearings on this one
top plate - bearings and nuts to tension the drive shafts same / same.
metal hub:
I'm still not quite sure that 40 mm is enough length. Even more so if they are measuring the head in the length. (I've run into that one as I've searched).
These guys:
[www.sdp-si.com]
Will sell you some 35 mm aluminum hollow shaft (35mm) for $30. You still have a few other things to get done....
I'm probably missing something very basic about mounting the motors and bearings. My approach is based on NEMA-23's and putting the bearing on the plate that's above the motors. The bearings should be small enough in O.D. to fit inside the bolt pattern on the face of the motor. Drop a few hollow spacers between the motor face and the board above it. Put bolts through the motor face holes, through the spacer, through the plywood, tighten them down.
Plate count:
Bottom plate with tension nuts for the thread rod and the casters on it, nothing else down here - same / same
second plate with electronics on the bottom - you have motors / I run the motor screws into the next plate up (I assume the build plate rests on this one)
third pale - interesting idea - I would mount both the motors and bearings on this one
top plate - bearings and nuts to tension the drive shafts same / same.
metal hub:
I'm still not quite sure that 40 mm is enough length. Even more so if they are measuring the head in the length. (I've run into that one as I've searched).
These guys:
[www.sdp-si.com]
Will sell you some 35 mm aluminum hollow shaft (35mm) for $30. You still have a few other things to get done....