SparkFun Forums 

Where electronics enthusiasts find answers.

General project discussion / help
Did you make a robotic coffee pot which implements HTCPCP and decafs unauthorized users? Show it off here!
By Skypickle
I want to be able to know the direction my robot is looking when it’s turned on. I do not want to do a calibration sweep so I have decided to go with an absolute encoder. ... gKAY_D_BwE

I found a used one for cheap on eBay. So now I need a dc motor with the drive shaft exposed on both sides so I can use a coupling to join them. Since I don’t need fast rpms almost any motor will do. Can someone suggest one? I cannot seem to find a small dc motor with low rpms which has an exposed mating shaft
By Skypickle
Thank you. This is the motor I have ... pm-12-v-2/

You can see the relative encoder attached to the bottom. I am just concerned about taking that encoder off and rendering the motor useless. Clearly there are the 4 leads to the encoder and two to the motor. There don’t seem to be any screws holding the encoder pcb to the motor. Do I just pry it off and hope for the best? I cannot seem to find an ‘exploded’ view diagram so any suggestions would be appreciated before I apply percussive analysis.
By jremington
It looks like the encoder PCB is held on to the motor by the solder connections to the motor terminals, see arrows on attached photo.

You will have to unsolder those cleanly in order to safely remove the PCB, after pulling off the magnet (best to use a micro-sized gear puller). Otherwise you will probably destroy the brush connections.

You realize, of course, that the encoder will report the motor shaft position, not the output shaft position, so you will have to keep track of shaft revolutions to track the head position.
You do not have the required permissions to view the files attached to this post.
long long title how many chars? lets see 123 ok more? yes 60

We have created lots of YouTube videos just so you can achieve [...]

Another post test yes yes yes or no, maybe ni? :-/

The best flat phpBB theme around. Period. Fine craftmanship and [...]

Do you need a super MOD? Well here it is. chew on this

All you need is right here. Content tag, SEO, listing, Pizza and spaghetti [...]

Lasagna on me this time ok? I got plenty of cash

this should be fantastic. but what about links,images, bbcodes etc etc? [...]