0
\$\begingroup\$

I have this a MegaMo SY3056 BLDC Spec.PDF MegaMo SY3056

And beside the cables that are connected to the ESC i have thses encoder cables: Encoder Cables

How can i read this encoder? and what values do i get?

Can i know the absolut position of the motor ?

\$\endgroup\$
  • \$\begingroup\$ Without a proper data sheet, who can tell? All we can glean from the one you have there is that it has a hall-effect sensor. \$\endgroup\$ – Majenko Nov 3 '11 at 10:10
  • \$\begingroup\$ maybe the manufacturer has a separate generic data sheet for the sensors \$\endgroup\$ – JustJeff Nov 3 '11 at 10:57
  • \$\begingroup\$ Yes, but i couldn't find the datasheet anywhere ... \$\endgroup\$ – Danpe Nov 3 '11 at 11:42
2
\$\begingroup\$

I found a data sheet for a different MegaMo motor. It seems to have similar wiring, with the following specs related to the encoder connector:

A Hall Sensor         Blue 
B Hall Sensor         Green 
C Hall Sensor         Yellow
+6V Logical Supply    Red 
GND Logical           Black

(from the BL2235 datasheet)

This should at least get you started on reading the encoder. Couldn't find anything more detailed about the sensors/resolution. Hopefully you find this helpful.

\$\endgroup\$
0
\$\begingroup\$

With no proper datasheet available looks like you will have to guess (I had a look, very little on the website - you could try sending an email to the address given there)

Is there an encoder attached to the motor also? How many wires are coming from the motor in total?

A few thoughts...

If the wires going into the casing in the top picture are the main motor connections:
I think the red is for V+, black for ground. This is easily confirmed by briefly applying power and see if the motor turns. The other three(?) are likely to be for the hall effect sensor - possibly white for V+, green for ground and [unseen wire] for output.
It would be wise to use a current limited supply if you have one (e.g. bench supply) If not I would put a 100-500 ohm resistor in series with the V+ to the sensor (whichever wire you are trying) The sensor output may be open drain, so a 1-10k resistor from the output to V+ maybe required.

Not sure about the encoder wires without more info.

More photos/explanation of wiring/electronics (can you partially dismantle to get a better look if necessary?) might help to guess better.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.