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NeveRest 40 Gearmotor (am-2964a)

Encoder cables are not included

 
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Price: $28.00

Stock Status: In Stock

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Product Overview:
The NeveRest 40 is a gearmotor with an attached encoder. The output shaft geometry and the gearbox housing diameter is similar to what FTC teams are familiar with. The shaft is 6mm dia and the gearbox housing is 37mm diameter.

This is the same as part 'am-2964' as per the manual, these have the addition of power pole connectors pre-attached!

FTC Legal:
According to the FIRST Tech Challenge Game Manual Part 1, Rule RE04 this is legal for the 2016-2017 FTC Game.

Encoder Cable options:
Encoder cables are not included with this motor, and are sold separately. We have two options:
  1. am-2992 is a cable which has the white 4-pin connector for the encoder and also the black 4-pin connector for the HiTechnic and Modern Robotics motor controller.
  2. am-2993 is a cable which has the white 4-pin connector for the encoder on one end and 4 separate black connectors.
Encoder:
There is an encoder mounted to the back side of this motor. It is a 7 pulse per revolution (ppr), hall effect encoder. Since the motor's gearbox has a 40:1 reduction, then the NeverRest 40 output shaft provides 280 ppr.

Working with the Encoders:
Specifications:
Physical Specs:
  • Overall Length: 133.5mm (5.26 in)
  • Maximum Diameter: 37mm (1.46 in)
  • Output Shaft size: 6mm (0.24 in) with 0.5mm deep flat
  • Weight: 0.75 pound
  • Mounting Holes: M3 tapped holes, qty. 6, on a 31mm bolt circle (3.5mm depth MAX, beyond this can damage plate and stop motor)
  • Electrical Connection Geometry: 6-pin connector for motor power and encoder contact
  • Gear Material: Steel
  • Body Material: Steel with plastic encoder housing
  • Lubrication: Included with gearbox
  • Shaft Hardness: 45-50 Rockwell C (https://en.wikipedia.org/wiki/Rockwell_scale)
  • Wire Gauge: 18 AWG
Performance Specs:
  • Gearbox Reduction: 40:1
  • Voltage: 12 volt DC
  • No Load Free Speed, at gearbox output shaft: 160 rpm
  • No Load Free Speed, motor only: 6,600 rpm
  • Gearbox Output Power: 14W
  • Stall Torque: 350 oz-in
  • Stall Current: 11.5 amps
  • Force Needed to Break Gearbox: 1478 oz-in
  • Minimum torque needed to back drive: 12.8 oz-in
  • Output counts per revolution of Output Shaft (cpr): 1120 (280 rises of Channel A)
  • Output pulse per revolution of encoder shaft (ppr): 28 (7 rises of Channel A)
Performance Specs, mounted to AndyMark dyno:
  • Max Speed (under load of dyno): 129 rpm
  • No Load Current (under load of dyno): 0.4 amps
  • Stall Current: 11.5 amps
  • Stall Torque: 396 oz-in
  • Max Output Power: 15 Watts
  • Time to Failure at Stall: 2 minutes, 54 seconds
  • Motor Case Temperature at Failure: 190 degrees F
More Information:
Cougar Robotics 4251 has done some great research on this motor. See their notes on our motor.

Average Customer Review: 4.5 of 5 Total Reviews: 54 Write your own review!

  0 of 0 people found the following review helpful:
 
Excellent motors January 27, 2017
Reviewer: Anonymous Person from Redmond, WA United States  
Our FTC team needed more motors. Andymark is the teams favorite brand, and they delivered on time for the competition :)
Thank you!

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  0 of 0 people found the following review helpful:
 
Vroom! January 19, 2017
Reviewer: Prof. Techs from Cedar Creek, TX United States  
It's nice to get more power than the standard DC motor. Also, why build your gearbox or encoder when you can get this pre-built one?

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  0 of 0 people found the following review helpful:
 
Great reliable motor December 19, 2016
Reviewer: Ih from Oxford, MI United States  
Good motor. Reliable.

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  0 of 0 people found the following review helpful:
 
quickness December 16, 2016
Reviewer: Joe Tombari from Spokane, WA United States  
I order and you ship promptly it is great.Have not used these motors yet but will be implementing them over the christmas break.

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  0 of 0 people found the following review helpful:
 
All Things Considered - A Good Product November 30, 2016
Reviewer: Eric Evans from Ferris, TX United States  
We purchased the NeveRest am-2964a motors to replace our TETRIX motors. After about 2 weeks of testing/driving, one of the pinion gears broke free from the motor axle. As we had purchase 2 extra motors, we chose to replace both of the motors on the robot to allow for even wear and tear. Within 10 minutes, one of the new motors suffered the same failure. As we were less than 48 hours to a scrimmage meet, we elected to use J.B. Weld to secure the pinion gears to the axles to move forward.

Up to this point, we have had no other pinion gear failures, so it is possible we just had 2 random/fluke failures.

Beyond that, these motors are great! The encoders are predictable in their behavior and are securely affixed to the motors. All-in-all, a good product.

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