EShapeoko 1.2 Assembly: X and Y motors
For this step you need the motor plates, the motors, the contents of Pack 3, and some parts from Packs 4 and 5.
Pack 3 contains the hardware and belt pulleys for both X and Y motors. The parts for the Y belt idlers are in Pack 4, and those for the X belt idlers in Pack 5.
Note that the left and right Y carriages must be mirror images of each other. As looking into the shaft of the motor, the left motor plate should have the cut off corner on the left, and the right motor plate should have it on the right. The X motor plate can be positioned either way, but it is illustrated here with the cut off corner on the left.
NEMA 17 Motors
There are three supported configurations for the motors, belts and idlers when using NEMA 17 motors.
A. Belt on top
VIEW OF X AXIS
VIEW OF Y AXIS
This is the default configuration for the X axis. Extra parts are required to implement it on the Y axis.
EXPLODED VIEW
| Item | Part Number | Part Description | Count |
|---|---|---|---|
| 1 | EM-LMP | Motor mount plate | 1 |
| 2 | Assembled idler wheel | 2 | |
| 3 | EM-S5-30 | M5 30mm cap screw | 2 |
| 4 | EM-W5 | M5 washer (form A) | 8 |
| 5 | EM-D5-04b | M5 6.35mm aluminium spacer | 2 |
| or | |||
| EM-D5-04a | M5 6.35mm nylon spacer (thick) | ||
| 6 | EM-N5 | M5 hex nut | 2 |
| 7 | NEMA 17 stepper motor | 1 | |
| 8 | EM-BP5 | 18-tooth MXL pulley 5mm bore | 1 |
| 9 | EM-S3-6 | M3 6mm cap screw | 4 |
| 10 | EM-W3 | M3 washer (form A) | 4 |
Bolt the motor to the motor plate using the M3 screws, with one washer each. Use the top NEMA 17 hole pattern.
Install the idlers using 6.35 mm spacers in the holes shown. Orient them with the protruding bearing closer to the motor plate.
Align the belt pulley with the idlers, and tighten the set screw firmly.
If using this configuration on the Y axis, this depicts the left Y carriage. The right Y carriage is a mirror image (it has the cut off corner on the opposite side).
B. Belt on the outside, upper position
VIEW OF X AXIS
VIEW OF Y AXIS
This is the default configuration for the Y axis. Extra parts are required to implement it on the X axis.
EXPLODED VIEW
| Item | Part Number | Part Description | Count |
|---|---|---|---|
| 1 | Assembled idler wheel | 2 | |
| 2 | EM-S5-30 | M5 30mm cap screw | 2 |
| 3 | EM-W5 | M5 washer (form A) | 6 |
| 4 | EM-N5 | M5 hex nut | 2 |
| 5 | NEMA17 stepper motor | 1 | |
| 6 | EM-BP5 | 18-tooth MXL pulley 5mm bore | 1 |
| 7 | EM-S3-30 | M3 30mm cap screw | 4 |
| 8 | EM-W3 | M3 washer (form A) | 4 |
| 9 | EM-D3-15 | M3 23.81mm spacer | 4 |
Put a washer on each M3 bolt. Hold the motor plate face down and and put the bolts in the holes. Place a flat object, such as a business card or a small flat plate, on top of the bolt heads, and using that object to hold the bolts in, turn the plate over. Lay the plate on the table and put the spacers on each bolt. Slide the plate to the edge of the table until one bolt is past the edge, holding that bolt from below. Bring the motor in position and twist that bolt in. No need to tighten: just enough so it doesn't fall out. Continue sliding the plate, doing one bolt at a time. Once all are in, snug all four bolts, then tighten one diagonal first, then the other.
The idlers are installed with the protruding bearing toward the plate.
If using this configuration on the Y axis, this depicts the left Y carriage. The right Y carriage is a mirror image (it has the cut off corner on the opposite side).
C. Belt on the outside, lower position
VIEW OF X AXIS
VIEW OF Y AXIS
No extra parts are required for the Y axis. The same extra parts are required to implement it on the X axis as option B above.
This configuration offers the best contact between the belt and the pulley.
EXPLODED VIEW
See previous option for list of parts and instructions.
NEMA 23 Motors
There are three supported configurations for the motors, belts and idlers when using NEMA 23 motors.
D. Belts on the outside
VIEW OF X AXIS
VIEW OF Y AXIS
This is the default configuration for NEMA 23 motors on the Y axis, and one of the alternatives for the X axis. No extra parts are required.
This configuration offers the best contact between the belt and the pulley.
EXPLODED VIEW
LIST OF PARTS
INSTRUCTIONS
E. Belts on top, lower position
VIEW OF X AXIS
VIEW OF Y AXIS
This is one of the alternatives for the X axis. Extra parts are required to implement it on the Y axis.
This configuration is more compact than option D and has a lower centre of gravity than option F, but it has the least contact between the belt and the pulley.
EXPLODED VIEW
LIST OF PARTS
INSTRUCTIONS
F. Belts on top, upper position
VIEW OF X AXIS
VIEW OF Y AXIS
This is one of the alternatives for the X axis, where it requires eight extra M5 washers. Extra parts are required to implement it on the Y axis.
This configuration has better belt contact than option E. Note that older machines may not have this hole pattern on their motor plates.
EXPLODED VIEW
LIST OF PARTS
INSTRUCTIONS
Default Choices
| Option | Rear plate for X carriage | Left Y carriage | Right Y carriage |
|---|---|---|---|
| All axes NEMA 17 | Option A | Option B | Mirror image of option B |
| NEMA 23 on X axis only | Option D or E | Option B | Mirror image of option B |
| NEMA 23 on X and Y axes | Option D or E | Option D | Mirror image of option D |
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