Here are a couple images of the new 37mm spur gear motor we are considering for a new product. The encoder is a hall effect sensor, with 20khz response. It has 12ppr on the motor with 31:1 reduction for 372ppr at the final gear. It’s going to be (hopefully) a drop in replacement for the GHM-01-4 motors we currently sell. However it’s got a lot more punch! 
It weighs in at 17.54 kg-cm stall torque!
http://www.lynxmotion.com/images/temp/37ghm1.jpghttp://www.lynxmotion.com/images/temp/37ghm2.jpg
Whats a Encoder?
Jim, Why do your products rock? Whats your secret in pleasing all of us??
i think its because there so SHINY!!!
well, 17 kg-cm stall torque is much better than 17 kgs…as in weight…which i though it was originally was
looks good jim, cant wait to see this product out
It is a device that allows you to keep track of the motor rotations. The one that I have used in the past was a modified version of:
nubotics.com/products/ww01/index.html
What it allows you to do is to count revolutions or parts of revolutions. I believe the one I used gave me 32 signals per revolution.
Oh,thats right,i remember now,
i used one a long time ago,but i forgot about it,
and i didn’t know it was called a Encoder
Here is an image of the waveform from one side of the quadrature output. The motor is running on 12vdc in the image. It looks to have nice clean square waves. 8)
[size=75](Pssst! You need to recharge your scope!)
Also: Ooh! Shiny!
…and square![/size]
17.54 kg cm huh, how much current does it draw at stall.
that is a clean wave, so when do we get the encoder supported motor controller? Or could we fet stack on your new open servo controller board and hack in the encoder inputs.
Nice Fluke scope by the way, wish I had toys that shiny
nick_a
6.6amps at stall.
The open servo board should handle it ok. We are looking to at least get the physical connections for an encoder on there too, but I will admit it was an afterthought. 
$1k is a little to shiny for me, most of us don’t have business accounts to buy our toys with.
6.6 amps is not so bad, I was expecting more draw at that torque; still a power hungry motor.
nick_a
