Contents hide

2.2 MecanAM Recommended Tool List:

2.3 Product Usage Instructions:

2.3.1 MecanAM Pulley Assembly:

2.3.2 MecanAM Chassis Assembly:

2.3.3 Documents / Resources

am-3677 MecanAM FTC Chassis

Product Information:

Chassis Assembly Guide

The Chassis Assembly Guide provides instructions for assembling
the MecanAM Drive Chassis.

MecanAM Recommended Tool List:

The following tools are recommended for assembling the MecanAM
Drive Chassis:

am-3677 6-32 HHS 1/4 – 5/16 Double Open-End Wrench
am-3174 6-32 Jam Nut
2.5mm Ball End Hex Driver
am-3724 M3 SHCS 7/64 Hex Driver
am-3032 6-32 SHCS

Product Usage Instructions:

MecanAM Pulley Assembly:

Take two 8mm pulley halves and put them together to form one
24T Nub Bore Pulley (am-3401).
Place a 6mm D-Bore Double Boss Nub (am4311) into the center
bore of a 24T Nub Bore Pulley (am-3401).
Flip the pulley over and secure the Nub to the gear by
threading four 6-32 x 0.75 in Hex Head Screws (am-1564).
Ensure the #10-32 Set Screw is threaded into the Nub. Keep
these set screws loose until installed on the axle.
Repeat steps 1-3 to make four (4) total MecanAM 8mm Bore Pulley
Assemblies.

MecanAM Chassis Assembly:

Install two Flanged Round Bearings (am0028) in the MecanAM Side
Plate (am-4760) with the bearing flanges on the same side as the
flange on the side plate.
Install two NeverRest Orbital gear motors to one end of the
MecanAM Side Plate using eight M3-0.5 x 5mm Socket Head Screws
(am1675). The plate flange should extend over the motors.
Repeat step 1 & 2 to install the bearing and motors on the
other side plate. When installed, the motors should be mirrored
when the plates are lined up.
Install two MecanAM Cross Plates (am-4759) using eight 6-32 x
Hex Head Screws (am-1562) and eight 6-32 Nylock Jam Nuts (am-1419).
Note: It is recommended that the hex on the jam nut be parallel to
the flange on the side plate.
Repeat Step 4 to attach the other plate with motors onto the
opposite side.
Install one 3×25 Grid Plate (am-4758) to the flange of the
MecanAM Side Plate using four 6-32 x Hex Head Screws (am-1562) and
four 6-32 Nylock Jam nuts (am-1419) evenly spaced along the
plate.
Repeat Step 6 to attach the other 3×25 Grid Plate (am-4758) to
the opposite MecanAM Side Plate.
Slide four MecanAM Pulley Assemblies on the motor shafts with
the Nub side closer to the motor.
Install two Flanged Hex Bearings (am-4489) in the MecanAM Side
Plate with the bearing flanges.

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Chassis Assembly Guide

MecanAM Recommended Tool List

Product

Component

Number Used On

Product Photo

¼” Nut Driver

am-3677 6-32 HHS

1/4″ – 5/16″ Double Open-

6-32 HHS

End Wrench

am-3174 6-32 Jam Nut

2.5mm Ball End Hex Driver am-3724 M3 SHCS

7/64″ Hex Driver

am-3032 6-32 SHCS

MecanAM Drive Chassis Component
Right BB Mecanum Wheel OR Right HD Mecanum Wheel

Product Number
am-3735R OR am-4763R

Quantity Product Photo
2 OR

Left BB Mecanum Wheel OR Left am-3735L OR

HD Mecanum Wheel

am-4763L

NeveRest Orbital Gear Motor

am-4609a/b, am-

3637/b

Side Plate

am-4760

3×25 Grid Plate Cross Plate

am-4758

am-4759

45T HTD Belt, 225-5M-09

am-3273

105T HTD Belt, 525-5M-09

am-3850

Hex Head Screw, 6-32 x 3/8 in with Thread Lock Patch Hex Head Screw, 6-32 x ¾ in with Thread Lock Patch

am-1562 am-1564

40 16
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Socket Head Cap Screw, 6-32 x am-1657

2.125 in

4mm ID x 6mm OD x 43mm

am-1656

Spacer

Washer, Fender #6 x 5/8″ od am-1658

6-32 Nylock Jam Nut

am-1419

3/8″ID Flanged Shielded

am-0028

Bearing (FR6ZZ)

0.375 in Shielded Flanged

am-4489

(FR62RS-Hex) Bearing

Pulley Half, 24T HTD 375 Hex am-3402_half

Bore

Pulley Half, 24T HTD 6mm Bore am-3401_half

6mm D Bore Double Boss Nub am-4311

375 Hex Spacer, 0.500 inches am-3947-500

Drive Shaft

am-4761

Socket Head Cap Screw M3-0.5 am-1675

x 5mm with Patch

MecanAM Pulley Assembly
Step 1: Take two 8mm pulley halves and put them together to form one 24T Nub Bore Pulley (am-3401).

Step 2: Place a 6mm D-Bore Double Boss Nub (am4311) into the center bore of a 24T Nub Bore Pulley (am-3401).

Step 3: Flip the pulley over and secure the Nub to the gear by threading four 6-32 x 0.75 in Hex Head Screws (am-1564).

Step 4: Ensure the #10-32 Set Screw is threaded into the Nub. Keep these set screws loose until installed on the axle.

Step 5. Repeat steps 1-3 to make four (4) total MecanAM 8mm Bore Pulley Assemblies.
x4
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MecanAM Chassis Assembly

Step 1: Install two Flanged Round Bearings (am0028) in the MecanAM Side Plate (am-4760) with the bearing flanges on the same side as the flange on the side plate.

Step 2: Install two NeverRest Orbital gear motors to the one end of the MecanAM Side Plate using eight M3-0.5 x 5mm Socket Head Screws (am1675). The plate flange should extend over the motors.

Step 3: Repeat step 1 & 2 to install the bearing and motors on the other side plate. When installed, the motors should be mirrored when the plates are lined up as shown below.

Step 4: Install two MecanAM Cross Plates (am-4759) using eight 6-32 x Hex Head Screws (am-1562) and eight 6-32 Nylock Jam Nuts (am-1419).
Note: It is recommended that the hex on the jam nut be parallel to the flange on the side plate.
Step 5: Repeat Step 4 to attach the other plate with motors onto the opposite side.
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Step 6: Install one 3×25 Grid Plate (am-4758) to the flange of the MecanAM Side Plate using four 6-32 x Hex Head Screws (am-1562) and four 6-32 Nylock Jam nuts (am-1419) evenly spaced along the plate.
Step 7: Repeat Step 6 to attach the other 3×25 Grid Plate (am-4758) to the opposite MecanAM Side Plate.
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Step 8: Slide four MecanAM Pulley Assemblies on the motor shafts with the Nub side closer to the motor.

Step 9: Install two Flanged Hex Bearings (am-4489) in the MecanAM Side Plate with the bearing flanges
on the same side as the flange on the side plate.

Note: Leave set screws loose until belts are installed.

Step 10: Install Side Plate to 3×25 Grid Plate using four 6-32 x Hex Head Screws (am-1562) and four 6-32 nylock jam nuts (am-1419).

Step 11: Repeat steps 9 & 10 on the opposite side plate.

Step 12: Put together two 3/8″ hex pulley halves to make a pulley assembly. Place one 45T Belt (am-3273) belt onto the pulley assembly on the motor closest to the end of the MecanAM Side Plate. Place the other end of the belt onto another pulley assembly.
Note: Super glue can be used to secure the pulley halves together. Step 13: Place a hex spacer (am-3947-500) on either side of the pulley and slide a shaft (am-4761) through the hex bearing, hex spacers and pulley. The round end of the shaft should sit in the bearing in the inner plate.
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Step 14: Use a washer (am-1658) and 6-32 x 0.375″ Screw (am-1562) to secure the shaft in place.
Step 15: Put together two 3/8″ hex pulley halves to make a pulley assembly. Place one 105T Belt (am-3850) onto the pulley assembly on the motor that is closer to the center of the MecanAM Side Plate. Place the other end of the belt onto the pulley assembly.
Note: Super glue can be used to secure the pulley halves together.
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Step 16: Place a hex spacer (am-3947-500) on either side of the pulley and slide a shaft (am-4761) through the hex bearing, hex spacer, and pulley. The round end of the shaft should sit in the bearing in the inner plate. Step 17: Use a washer (am-1658) and 6-32 x 0.375″ Screw (am-1562) to secure the shaft in place.
Step 18: Repeat steps 12-17 on the opposite side of the MecanAM frame.
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.
Step 19: Ensure the belts are parallel to the chassis and tighten the set screws on all of the Nubs to secure the pulley onto the motor shaft.

Step 20: Install four 43mm long spacers (am-1657) to the MecanAM Side Plates using four 6-32 x 2 Socket Head Screws (am-1657) and four 6-32 Nylock Jam Nuts (am-1419).

Step 21: Add 7 more spacers evenly spaced onto the chassis.

The MecanAM chassis is now complete and ready for wheels.

Note: Screw heads should be on the outside of the frame.
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Wheel Installation
BB Mecanum The AndyMark BB Mecanum wheel uses a thin plastic hex spacer against the frame and a 6-32 screw and washer to retain the wheel as shown below.
HD Mecanum The AndyMark HD Mecanum Wheel requires additional spacers to ensure the wheel has enough clearance on the frame and also uses an additional spacer to allow the screw and washer to retain the wheel on the shaft. We recommend the following configuration for spacers on the shaft.
Other Wheels Other wheels with a 3/8″ Hex bore can be used on the MecanAM chassis. Additional spacers may need to be added to accommodate the size and shape of other wheels.
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Wheel Placement Mecanum wheels are built in two configurations. If the rollers point up and to the right, they are “right” orientated wheels. If the rollers point up and to the left, they are “left” oriented wheels.

Left Wheel

Right Wheel

Using two “left” and two “right” wheels in the correct orientation allow for omni-directional motion. Mecanum wheels are installed in the correct orientation when the rollers form an X pattern when viewed from the top.

Left

Right

Left

Drive Wheels When all four mecanum wheels are driven in the same direction the chassis will move forward or backwards.
When the pair of wheels on each side of the chassis are driven opposing directions the chassis will rotate.
When the “right” mecanum wheels on opposite sides of the chassis run in one direction and the “left” mecanum wheels run in the opposite direction, the chassis will “strafe” and move sideways.
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