How to assemble a DC gear motor with encoder

Thread Starter

gersonelect

Joined May 3, 2017
1
Hello guys, I have the next problem. For a proyect I have, I need to assemble a DC motor with an encoder to obtain useful information like movement speed, acceleration and position of two wheels, and I don't know how to assemble those. I'm using two DC gear motors and two encoders as are displayed below (12[V], 30 [RPM] and torque between 6.3[kg/cm] and 14[kg/cm]), which are OK because my project consists in a robotic platform that has to load a maximum of 15[kg] distributed on two wheels and an industrial caster one. There is a possibility I could assemble the DC gear motors with the encoders I have? or maybe I'd better buy an AB024 rotative encoder for arduino instead the encoders I have as an alternative way?

Thanks in advance.


https://gyazo.com/6b774cbf1a28345f6b58180535daa3de "DC gear motor"
https://gyazo.com/917d88281f739179eebb228b57782b43 "Incremental Encoder"
https://gyazo.com/384f4cfbafa71ed6006c23cd2d5c0609 "Incremental Encoder"
https://gyazo.com/08c9a55d03c8a10f27a8cb3b9657eac9 "DC gear motor and Incremental Encoder"
https://gyazo.com/eb50bf6baa452fa546ca8000e9b8d813 "DC gear motor and Incremental Encoder"
https://gyazo.com/ae0884c7a2b77b80cc58aa9602014da2 "DC gear motor and Incremental Encoder"
 

blocco a spirale

Joined Jun 18, 2008
1,546
The obvious answer is that you need to mechanically couple the encoder shaft to the motor/gearbox output shaft. How you do this is up to you and depends on what else is connected to the motor and how much space is available. You might consider coupling the two using either a chain, gears or toothed belt. Whatever you choose will require some custom metalwork.

Alternatively, buy a motor with a built-in encoder.

http://www.ebay.co.uk/itm/NEW-6V-10...249522?hash=item3d19867df2:g:desAAOSwa~BYbs2m
 
Last edited:

MisterBill2

Joined Jan 23, 2018
13,139
Hello guys, I have the next problem. For a proyect I have, I need to assemble a DC motor with an encoder to obtain useful information like movement speed, acceleration and position of two wheels, and I don't know how to assemble those. I'm using two DC gear motors and two encoders as are displayed below (12[V], 30 [RPM] and torque between 6.3[kg/cm] and 14[kg/cm]), which are OK because my project consists in a robotic platform that has to load a maximum of 15[kg] distributed on two wheels and an industrial caster one. There is a possibility I could assemble the DC gear motors with the encoders I have? or maybe I'd better buy an AB024 rotative encoder for arduino instead the encoders I have as an alternative way?

Thanks in advance.


https://gyazo.com/6b774cbf1a28345f6b58180535daa3de "DC gear motor"
https://gyazo.com/917d88281f739179eebb228b57782b43 "Incremental Encoder"
https://gyazo.com/384f4cfbafa71ed6006c23cd2d5c0609 "Incremental Encoder"
https://gyazo.com/08c9a55d03c8a10f27a8cb3b9657eac9 "DC gear motor and Incremental Encoder"
https://gyazo.com/eb50bf6baa452fa546ca8000e9b8d813 "DC gear motor and Incremental Encoder"
https://gyazo.com/ae0884c7a2b77b80cc58aa9602014da2 "DC gear motor and Incremental Encoder"
 

MisterBill2

Joined Jan 23, 2018
13,139
If the encoders are intended to be part of a control system for the motor then they should be directly coupled to the shaft, either the motor shaft or the gearbox output shaft. Sometimes shafts of similar diameters can be coupled with a short length of vinyl plastic tubing. That is cheap, easy, and it allows a small amount of misalignment to be allowed..
I did not use those links so I don't know what they look like. The time to decide how they will be coupled is before purchasing them. Sorry to not be able offer more specific help.
 

MaxHeadRoom

Joined Jul 18, 2013
25,986
You really need a motor that has access to the rear shaft in order to couple it.
You may find a surplus DC servo motor with a encoder already attached, ebay etc.
The ones you show are not really conducive to servo operation.
Max.
 
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