Hello everybody
Does anybody know what resolution the Encoder from the “Planetary Gear Motor - PGM36 26.9:1” got ?
Cant find it in the chinese description…
Link : lynxmotion.com/p-1079-planet … -2691.aspx
yours sincerely
Marco
The magnet at the rear has 8 N/S poles, for a total count of 16 per revolution of the rear shaft.
ok thank you very much for the fast response! 
maybe you can also help me find the optimal motor for me.
im looking for a motor which we can use with 6V. correct me if im wrong, if i got a 12V motor and use it with only 6V means that i have the same amount of torque but only the half of rpm ?
we need maximal 25 rpm.
the motor should be as silent as possible.
the encoder resolution as high as possible
It’s best not to operate a motor too far outside its nominal voltage.
At 6V, it would be roughly half the speed, but considerably less efficient.
If your main battery is 6V, it’s best to choose a 6V nominal motor - and there are many. 7.2V is ont perfect, but can be an option as well.
robotshop.com/en/gear-motors … shaft.html
ok. but i cant find a motor with 6V or 7.2v with only 25rpm…
thats why i was looking for the 12V motors
robotshop.com/en/pololu-1000 … RB-Pol-326
6V, 25rpm no load. Plus
robotshop.com/en/12-cpr-magn … tible.html
The encoder requires soldering.
this one would be really noisy i think, with a gear of 1000:1, isnt it ?
The only way to get a very low RPM without the use of a motor controller would be the gearing.
You might consider a compatible spur gear motor and a worm gear: robotshop.com/en/vertical-sh … arbox.html
Note that this reduce the speed by an additional factor of 30:1, but does so with just one gear pair.