Section 4: Rack and Pinion Drive¶

4.1 Rack and Pinion Assembly (NEMA 23)¶

Section Note

Skip to Section 4.2 if you are using a NEMA 34 electronics package.

Parts and Tools Required¶

The following bags and parts will be used in this section:

(3) NEMA 23 Stepper Motor
(3) CRP201-09 NEMA 23 R&P Motor Pulley
(3) NEMA 23 R&P Drive Plate
(3) CRP203-00 NEMA 23 Standard Drive Spindle
(3) CRP201-00-FAST-02-17.2
- (3) 3/8" Washer
- (3) 1" x 0.5" Shoulder Bolt
- (3) NEMA 23 R&P Drive Belt
- (12) 10-32 x 5/8" Socket Head Cap Screw
- (12) 10-32 Hex Nut

The following tools will be used in this section:

3/32" Allen Wrench
5/32" Allen Wrench
1/4" Allen Wrench
Tape Measure

4.1.1 Motor Assembly¶

4.1.1.1¶

Remove tape on motor shaft.
Loosen motor pulley set screws.
Install motor pulley on motor shaft as indicated.

Assembly Note

Ensure keyway is fully seated in slot on motor shaft to allow easy installation of the motor pulley.

4.1.1.2¶

Position motor pulley to dimension shown.
Tighten indicated set screws. Red Arrows

4.1.2 Drive Plate Assembly¶

4.1.2.1¶

Install spindle on drive plate as indicated.
Fully tighten shoulder bolt.

Assembly Note

Ensure the drive spindle is installed on the correct side of the drive plate. The spindle will be on the same side as the recessed nut slots, as shown in the above figure.

4.1.2.2¶

Place the motor on the drive plate as indicated.

4.1.2.3¶

Install drive belt on motor pulley and drive spindle as indicated.

4.1.2.4¶

Orient motor with the cable in the position indicated by the red arrow.

4.1.2.5¶

Insert motor fasteners as indicated.

Assembly Note

Do not tighten these fasteners prior to adjusting the belt tension in the following step.

4.1.2.6¶

Tension belt by applying pressure to motor in the indicated direction.
Keep this pressure on the motor and tighten the 10-32 x 5/8" motor screws.

4.1.2.7¶

Use this process to assemble three R&P Assemblies.

Assembly Note

Orient each motor with the cables in the position indicated by the red arrows.

4.2 Rack and Pinion Assembly (NEMA 34)¶

Assembly Note

Skip to Section 4.3 if you are using a NEMA 23 electronics package.

Parts and Tools Required¶

The following bags and parts will be used in this section:

(3) NEMA 34 Stepper Motor
(3) CRP301-03 NEMA 34 Motor Pulley
(3) NEMA 34 R&P Drive Plate
(3) CRP303-00 NEMA 34 Standard Drive Spindle
(3) CRP301-00-FAST-17.2
- (3) 0.020" Shim
- (3) 1.25" x 0.5" Shoulder Bolt
- (3) NEMA 34 R&P Drive Belt
- (12) 1/4-20 x 3/4" Socket Head Cap Screw
- (12) 1/4-20 Hex Nut

The following tools will be used in this section:

3/32" Allen Wrench
3/16" Allen Wrench
1/4" Allen Wrench
Tape Measure

4.2.1 Motor Assembly¶

4.2.1.1¶

Remove tape on motor shaft.
Loosen motor pulley set screws.
Install motor pulley on motor shaft as indicated.

Assembly Note

Ensure keyway is fully seated in slot on motor shaft to allow easy installation of motor pulley.

4.2.1.2¶

Position motor pulley to dimension shown.
Tighten set screws as indicated. Red Arrows

4.2.2 Drive Plate Assembly¶

4.2.2.1¶

Install spindle on drive plate as indicated.
Fully tighten shoulder bolt.

Assembly Note

Ensure the drive spindle is installed on the correct side of the drive plate. The spindle will be installed on the recessed portion, as shown in the above figure.

4.2.2.2¶

Place the motor on the drive plate as indicated.

4.2.2.3¶

Install drive belt on motor pulley and drive spindle as indicated.

4.2.2.4¶

Orient motor with the cable in position indicated by the red arrow.

4.2.2.5¶

Insert motor fasteners as indicated.

Assembly Note

Do not tighten these fasteners prior to adjusting the belt tension in the following step.

4.2.2.6¶

Tension belt by applying pressure to motor in the indicated direction.
Keep this pressure on the motor and tighten the 10-32 x 5/8" motor screws.

4.2.2.7¶

Use this process to assemble three R&P Assemblies.

Assembly Note

Orient each motor with the cables in the position indicated by the red arrows.

4.3 Rack and Pinion Installation¶

Parts and Tools Required¶

The following bags and parts will be used in this section:

(3) CRP201-00-FAST-02-17.2 (NEMA 23 Applications)
- (3) 0.005" Shoulder Bolt Shim
- (3) 1/2" x 1/2" Shoulder Bolt
(3) CRP301-00-FAST-17.2 (NEMA 34 Applications)
- (3) 0.005" Shoulder Bolt Shim
- (3) 3/4" x 1/2" Shoulder Bolt
(3) CRP201-00-TEN-17.2
- (3) M8 x 10mm Hex Cap Screw
- (3) M6 x 12mm Flat Head Screw
- (3) R&P Tensioner Bracket
- (3) R&P Tension Post
- (3) M8 x 100mm Socket Head Cap Screw
- (6) M8 Flat Washer
- (3) Die Spring