Forum >KIT0015 - MiniQ Motor Wheel Set with Encoder Issue
KIT0015 - MiniQ Motor Wheel Set with Encoder Issue
GastonLagaffe 2013-05-16 07:07:22 7061 Views5 Replies Salut,
I have the MiniQ Motor Wheel Set with Encoder installed and when I run both wheels in parallel, one encoder counts 1.446 times the counts of the other encoder. The ratio is quite fixed and repetitive. Has this been seen by others and is there a known fix?
I also wonder that when I turn the wheel 360 degrees I get 10 counts but I was expecting 48 on one revolution.
Any help is welcome.
Ciao, Mathias
I have the MiniQ Motor Wheel Set with Encoder installed and when I run both wheels in parallel, one encoder counts 1.446 times the counts of the other encoder. The ratio is quite fixed and repetitive. Has this been seen by others and is there a known fix?
I also wonder that when I turn the wheel 360 degrees I get 10 counts but I was expecting 48 on one revolution.
Any help is welcome.
Ciao, Mathias
2013-05-20 23:48:59 Hi Mathias,
sorry about the late reply.
I am trying to solve that problem. Apparently there are just 12 teeth on the wheel. I am checking the sample code and will do a test run. When I got a result I'll let you know.
lumi
sorry about the late reply.
I am trying to solve that problem. Apparently there are just 12 teeth on the wheel. I am checking the sample code and will do a test run. When I got a result I'll let you know.
lumi 2013-05-18 01:29:00 Salut,
encoder run stable now, but only 12 counts per revolution due to the wheel setup that has only 12 white teeth.
In my eyes, the encoder/wheel kit cannot deliver more than 12 counts per revolution by design. With this setup, I do not understand the way Sig-A and Sig-B shall work as they are quite far apart and are not looking at the same white tooth. The example code does not give a hint.
(I use the ROB0049 plus Romeo v2)
Ciao, Mathias GastonLagaffe
encoder run stable now, but only 12 counts per revolution due to the wheel setup that has only 12 white teeth.
In my eyes, the encoder/wheel kit cannot deliver more than 12 counts per revolution by design. With this setup, I do not understand the way Sig-A and Sig-B shall work as they are quite far apart and are not looking at the same white tooth. The example code does not give a hint.
(I use the ROB0049 plus Romeo v2)
Ciao, Mathias
GastonLagaffe 2013-05-18 01:04:23 Hi Mathias,
ok, that seems fixed. However, can you confirm that the steps per revolution are 48 now?
Let me know if you need further help.
lumi
ok, that seems fixed. However, can you confirm that the steps per revolution are 48 now?
Let me know if you need further help.
lumi 2013-05-17 00:58:51 Salut,
I dis-assembled the robot again, the version of the encoder is v1.1 dated 12/27/2011 as on the product page so I asusme I have the actual one.
When reassembling I noticed that the original assembly (the robot came per-assembled) did not position the motor and the encoder in the deepest position. When putting the motor and encoder in the deepest position, the two encoder deliver the same counts. I think, the outer position picked up the rim of the wheel and therefore in-stable triggers.
Ciao, Mathias GastonLagaffe
I dis-assembled the robot again, the version of the encoder is v1.1 dated 12/27/2011 as on the product page so I asusme I have the actual one.
When reassembling I noticed that the original assembly (the robot came per-assembled) did not position the motor and the encoder in the deepest position. When putting the motor and encoder in the deepest position, the two encoder deliver the same counts. I think, the outer position picked up the rim of the wheel and therefore in-stable triggers.
Ciao, Mathias
GastonLagaffe 2013-05-16 20:29:54 Hi Mathias,
first please make sure you try the example code from the Wiki [url=https://www.dfrobot.com/wiki/index.php/Mini_Robot_chassis_Encoder_(SKU:SEN0116)]https://www.dfrobot.com/wiki/index.php/Mini_Robot_chassis_Encoder_(SKU:SEN0116)[/url]
It should not happen that the encoders deliver different values. Also make sure there is no obstacle inside the wheel to distract the encoder and let me know the version of the encoder (printed on the board). lumi
first please make sure you try the example code from the Wiki [url=https://www.dfrobot.com/wiki/index.php/Mini_Robot_chassis_Encoder_(SKU:SEN0116)]https://www.dfrobot.com/wiki/index.php/Mini_Robot_chassis_Encoder_(SKU:SEN0116)[/url]
It should not happen that the encoders deliver different values. Also make sure there is no obstacle inside the wheel to distract the encoder and let me know the version of the encoder (printed on the board).
lumi 