AP Assembly Tutorial

DOME DRIVE Version 2

for

Banebot Motor

 

The AP Dome Drive was designed with the following objectives:

-- Provide a life-like rotation speed.  The head should snap to any position in a couple of seconds or less.

-- Provide a means to insure constant, even contact with the dome bearing.

-- Make the assembly robust so that it doesn't require frequent adjustment or tinkering.  The individual parts should be durable and of high quality to insure long life.

-- Use a high efficiencey motor to minimize battery drain.

Specifications:

Banebots RS-540 Planetary Gear Motor

Video:  Drive V2-1

Video: Drive V2-2

Video: Drive with Gear V2-3

 

 

 

 

Pre-assembly :  Motor holder after debur, cleanup and installation of the bearing insert.

Drive_V2-1.jpg (37539 bytes)

 

 

Pre-assembly:  Pivot screw is inserted into the motor holder.   Lubricant is applied to shoulder screw (petroleum jelly).

Drive_V2-2.jpg (36257 bytes)

 

 

Pre-assembly:  I attach two fiber washers to the back side of the motor holder. and insert the spring holder screw.

Drive_V2-3.jpg (39103 bytes)

 

 

Pre-asembly:  Bracket is attached to the motor holder.  There is a nylon insert in the shoulder screw to keep it from coming out, but a thread adhesive could also be added if it does not stay tight.

Drive_V2-4.jpg (38213 bytes)

 

 

Assembly:  Attach the motor to motor holder using four 10-32 X 1/2" flat head screws.

Drive_V2-5.jpg (18165 bytes)

 

 

Pre-Assembly:  The hub is attached to the wheel using four 5-40 socket head screws.  It will be necessary to loosen these screws a bit to attach the wheel to the motor later.  Note that this motor has a 3/8" diameter drive shaft.

Drive_V2-6.jpg (65710 bytes)

 

 

Assembly: Attach the friction ring to the wheel.  We are using a 411 red silicon o-ring.  It gives good adhesion to the rockler with a light spring.

Drive_V2-7.jpg (71285 bytes)

 

 

Assembly:  Wheel is attached to the motor.  Once it is in position tighten the four 5-40 cap screws in the wheel hub.  The set screw should fit into the key slot on the drive shaft. Leave the set screw slightly loose until the drive is mounted on the droid.

Drive_V2-8.jpg (35032 bytes)

 

 

Assembly:  The drive is attached to the upper frame ring using two included 1/4-20 X 5/8" cap screws.  The third included cap screw holds the tension spring to the frame.  The spring is stretched from the frame attachment screw to the 1/4-20 set screw on the end of the motor holder.

Drive_V2-9.jpg (20190 bytes)

 

 

Adjust the height of the drive wheel so that the red traction ring is centered on the rockler and then tighten the the set screw in the wheel hub.    The tension spring used for this drive is somewhat higher tension than the one used on the Pittman.  This minimizes slipping when the dome turns (the motor develops significantly more torque than the Pittman).

Drive_V2-10.jpg (17661 bytes)

 

  After you are satisfied that the wheel is in the optimum position, you can mark the motor drive shaft for cutting.  This is an optional step, but may be necessary if you use a dome tray to mount actuators in your dome.  The shaft is steel, and can be cut with a Dremel cutting wheel.

Drive_V2-11.jpg (16538 bytes)