Encoder Pair for Tamiya Twin Motor Gearbox

RobotShopSKU: RB-Rbo-122
Manufacturer #: RB-RBO-122

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Sale price £16.29

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In stock, 7 units

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  • Analog encoder pair for Tamiya Twin-Motor Gear Box (only config. C)
  • Includes two encoder PCBs, two Encoders wheels and two cables
  • Designed primarily for DFRobotShop Rover
  • 16 counts per rotation

The Encoder Pair for the Tamiya Twin Motor Gearbox allows you to add a pair of encoders to the popular Tamiya Twin-Motor Gear Box . Note that the encoders can only be used when the motors have been assembled in configuration C. The encoders were designed to be used on the DFRobotShop Rover, but can be used on any project. The encoder PCB needs to be glued (a dab of hot glue is ideal) to the gearbox, and the white encoder disc is press-fitted onto the 3mm hexagonal output shaft.

Encoder Pair for Tamiya Twin Motor Gearbox

Note that the wiring is OUTPUT -> GND -> 5V
Note: Wiring color and length may vary

DFRobotShop Rover User Guide (Includes section on encoder)

Customer Reviews

Based on 6 reviews
Works as expected

Product works as expected. I'm using them to add encoders to continuous rotation micro servo motors and they fit perfectly with a little hot melt glue. I had to discard the plastic encoder wheels and printed my own using address label paper to stick to the servo horns. I agree with other users that they should come with right angle headers or straight pins unsoldered. The non-standard pin wiring is also a minor pain to rework. Should have a digital output instead of analog output.

Not bad

The encoder wheel is very fragile - you can break it just by dropping it on the floor. You may need a Schmitt trigger (or a comparator) and/or some low-pass filter to get the output signal ready for a microcontroller. It's a bit too expensive for a simple circuit like that. Other than that, it works great

Works as advertised

This encoder pair is nicely built overall, I got it working with DF Rover right away. How to incorporate encoder data into your code is another story. Depending on your goals you may need some (a lot) of experimenting with the code. So, first of all, I'd suggest to buy and attach a Bluetooth Bee to the rover to monitor encoder data (and other parameters) wirelessly via a serial port. Secondly, after some of that experimenting and/or re-assembling the rover a few times you may realize that one of the encoder PCBs got loose. After one such accident I decided to glue the encoder PCBs (not the wheels) with 5 min epoxy instead of hot glue. Whatever works ;)

They work.. but..

These encoders work perfectly- but only if they are installed perfectly. And there are no instructions on how to do that. 1. Hot glue doesn't hold the encoder board to the side of the gearbox. I resorted to super glue after the fourth time one of the encoders detached. No problems since. 2. The disk needs to be (ideally) 1mm away from the circuit board when you glue it. But it slides freely on the axle so you'll need something to insert between them to provide that spacing and keep the disk level and removable after you apply glue. I built a cardboard insert, worked fine. 3. You won't get step 2 right and it'll be a little off, so be prepared to modify the sample code with numbers that match the voltages returned by own encoders.

Just arrived in the mail

I haven't used the encoders yet. They seem of good quality but I have to modify them by swapping out the pins. The encoders should be offered with right angle and straight pins unsoldered. That would allow users to easily adapt the encoders to motors other than they were intended. Not a complaint, just a suggestion, since it appears that others are adapting the encoders for use on different motors than they were intended.

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