USA
Asked — Edited
Resolved Resolved by DJ Sures!

Multiple Motors

Skip to comments   Jump to end

The robot that I am building is going to have DC motors for XY and Z movement as well as elbow bending, wrist turning, etc. I will probably wind up with eight DC motors when I'm done.
Now that I've learned how to drive a DC motor with an H-bridge which works for two motors how do I drive the remaining six motors ? One of the motors will require the use of a SyRen 50 controller. My plan is to use 10 turn potentiometers on the motors for position feedback.


ARC Pro

Upgrade to ARC Pro

ARC Pro is your passport to a world of endless possibilities in robot programming, waiting for you to explore.

#89  

Yhaaaa! Nicely done! What a relief. Did you leave the pull up resistors on the encoder?

I need to give her a call. It's good to know she's so available. I'm having a problem with my motor not centering at the same point depending which way it's approaching the center and where it's starting from. Don't know if it's the Roo or the Softpot. I've tried many different adjustments with no difference. I did ask Charleen a while back about this problem and she (and others I've asked) mentioned deadband settings. No change. I only mention this off subject item because I think you said you're using the Softpot also. Just something for you to keep an eye on.

#90  

Hi Dave!

That's good information! I do have a soft pot on my hydraulic ram which I will be driving with a SyRen 50/Kangaroo combo. I did have a little problem with the motor not completely stopping when using a pot for feedback - Charleen told me that was a deadband issue that I could easily solve with DEScribe when the cable arrives!

I am so excited that I have been able to get these motor controllers behaving like servos which is going to allow me to control larger gear drive motors and bring Wiggins to life!

Castle

#91  

My USB TTL cable arrived and today I got it working with DEScribe! Don't understand a thing I'm looking at...

#92  

Greetings!

My USB to TTL cable arrived from Amazon - I ordered the one that @Dave recommended. It turned out to be make by SparkFun but did not come with any drivers. I plugged it into my Windows 7 Pro machine and Windows searched for and installed drivers which didn't work. It would download the information from the Kangaroo but would not upload it - the error was "Failed to open serial port." After numerous support calls to Charleen at DE she recommended downloading the drivers from FTDI. I found a link on the SparkFun site for drivers and upon installing them on a Windows 10 machine the cable worked!

Here is the location for the drivers: https://cdn.sparkfun.com/assets/learn_tutorials/7/4/CDM_v2.12.00_WHQL_Certified.exe

Castle

Login to post a comment