Mulberry
USA
Asked
— Edited
Resolved by Rich!
Afternoon All
I'm stumped.
I'm trying to make a connection with a non-EZ GWS servo but am having no luck. I've tested the EZ with standard servos that came with the kit and they function fine. This GWS is rated at 4.5 volts to 6 volts and I've tested it at these and even lower. The port is correct, the board is properly selected, I restarted the EZ, insured I have the latest version but still get no movement or indication a signal is reaching the servo. It doesn't appear locked because I can turn the gears by hand. I'm hesitant to take it apart just yet.
Any suggestions?
Thanks,
Daniel
I don't think a "common ground" will help you unless using a separate supply. The ground ports on the EZ-B are in series, so the battery and servo will be using the same ground connection. No additional ground should be needed as its already making a commen ground connection.
What battery did you use with your testing earlier, and was you using the battery when you finally got a response, or did you switch back to the bench supply?
If the dev kit servos are still working, then you are correct and the EZ-B is fine.
You also say that you have now connected the servo directly to the EZ-B. How did you have it connected before?
I am confused... You should be plugging the GWS servo directly into one of the 3 pin digital ports of the ezb... Have you not been doing this? What have you been plugging it into if it wasn't the ezb4? If the ezb disconnects it usually means a brown out... This means something is sucking the power away from the ezb so it disconnects from ARC...
just a thought some servos are wired differently check the wires in the servo plug Hope this helps
If you had the servos ground and positive connected directly to the battery and white signal wire to the EZ-B, connect the ground and possitive servo wires the the EZ-B instead, and either use the bench supply and 6 to 7.5 volts using at least 5amps or more (the EZ-B can take 20amps), or depending on your battery type and voltage, insure the battery is fully charged before testing the servo again.
@Steve... I am still seriously confused why isnt the op just plugging the servo directly into the ezb4 and then use a rechargeable battery like a lipo or nimh with the ezb... Why all the wire bypass stuff?
@geoffhitch we have already been over that, doesnèt seem to be the problem
@Richard.
That's what I'm wondering. It wasn't until he mentioned "plugged directly to the EZ-B" I remembered he also said "connected White to white" with no mention of anything else, which got me thinking that he may have been powering it straight from the power pack, in which case a common ground may be needed. Is that correct @mulberry ? What ever power you give the EZ-B is what comes out of the red VCC digital pins.
@Steve... Cool, I thought it was just me having a little too much of that Canadian beer tonight... LOL. It has to be either a power problem or a defective servo....
@Richard.
Lol, My thoughts exactly. My money's on power as he said the did get the servo to move, briefly.