Asked — Edited
In my on-again/off-again Hero 1 reburb project I've given up on trying to use the stepper motors for the steering, head and arms. Can someone suggest a good sized servo or setup to use for these? The steering motor shaft is pretty big (larger than 1/4" at least).
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Send pictures so we can look at what you have to connect to .
Sorry I can't provide a link right now, but if you search the forums, I believe Jeremie recommended a board that works with EZ-B that was good for stepper motors. Or, easier, just use the servos that Richard linked above.
Here's that thread
Yes the A4988 is a good choice as well, it's a very popular stepper driver
This thread is a bit more descriptive
See my blog here (http://www.gregsherorobot.blogspot.com)
I have pictures of the setup.
The big issue you will have is the actual steering...since every time you turn on the robot, where ever the stepper is it considers home. You will have to make limit switches and then use a homing routine to keep this in check...even with that, it will steer a little crooked unless you keep the stepper powered during movement (which builds heat like crazy).
I am investigating a 1/4 scale servo right now to make the job easier.
I gave it temporary power through the EZB and it moved very smoothly. I will have to slow it down though...too quick for the old robot to comfortable take corners with!
What size/type coupler did you use for the connection?