AndyMark am-3677 MecanAM FTC Chassis Installation Guide

AndyMark 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:

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

MecanAM Chassis Assembly:

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

2. 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.

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.

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.

5. Repeat Step 4 to attach the other plate with motors onto the opposite side.

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.

7. Repeat Step 6 to attach the other 3×25 Grid Plate (am-4758) to the opposite MecanAM Side Plate.

8. Slide four MecanAM Pulley Assemblies on the motor shafts with the Nub side closer to the motor.

9. Install two Flanged Hex Bearings (am-4489) in the MecanAM Side Plate with the bearing flanges.

Recommended Tool List

MecanAM Drive Chassis

Assembly

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 (am-4311) 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.

MecanAM Chassis Assembly

• Step 1: Install two ⅜ Flanged Round Bearings (am-0028) 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 (am-1675). 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 ⅜ Hex Head Screws (am-1562) and eight 6-32 Nylock Jam Nuts (am-1419).
• Step 5: Repeat Step 4 to attach the other plate with motors onto the opposite side.
• Step 6: Install one 3×25 Grid Plate (am-4758) to the flange of the MecanAM Side Plate using four 6-32 x ⅜ 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.
• Step 8: Slide four MecanAM Pulley Assemblies on the motor shafts with the Nub side closer to the motor.
• Step 9: Install two ⅜ 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.
• Step 10: Install Side Plate to 3×25 Grid Plate using four 6-32 x ⅜ 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.
• 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.
• 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.
• 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.
• 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 2⅛ 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.

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.

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.

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.

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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