Camera Turret!

I have this cool camera turret. It has auto focus and a large lens. Steppers and stuff. And controllers.


As far as I know it’s working. I’m curious about the board. It looks like a lot of stuff on the board.

Wiring a Nema 17 Controller

I have this Nema 17 controller and I’m just wiring it up now. It has some confusing documentation.

The wires are Red, Green, Black and Blue.

The motor diagram is labeled A, B, C and D.

The controller diagram is labeled A- A+ B- B+.

Anybody know what the standards are for labeling?

1/4″ to 8mm couplers


Okay, I got my couplers made for my mill.

I bought some spider couplers from Princess Auto. You have to buy all the parts separately. So I bought three 1/4″, three 5/16″ and three inserts.

I drilled the 5/16″ to 8mm. This was pretty easy. I mounted a 5/16″ bit in my drill press. I then mated the bit to the 5/16″ coupler. I clamped the coupler in a flat vise, then clamped the flat vise onto the drilling bed. I made sure the drill bit could slide up and down without binding. Once I was convinced I was centered, I then replaced the bit in the press with an 8mm bit and drilled through.

These couplers are about 1/2″ longer than my old couplers so I will make some spacers for the stepper motor mounts.

I will get my new mill going to do this (I have to do that anyway).

Different stepper motor shafts


The electrical of my mill is sort of fried so I am wanting to put on my Zylotex 4-axis system which is probably much better.

Then once I’m finished making my 4th Axis, I will be all set.

I was just looking at the steppers on my mill and noticed that the shafts are 5/16 inches. How rude, the motors that came with my Zylotex are 1/4″ shaft.

The motors on the machine are:

  • 57BYGH636-41B
  • 1.8 degree
  • 3A
  • NO: 20101024
  • Shaft measures 0.315 (5/16) inches
  • Wires: Blue, Green, Red, Yellow


The ones I was about to put on are:

  • Zylotex
  • 23H276-28-4B
  • 2.8A/phase
  • 1.9Nm
  • MS Motor
  • Made in China
  • 2010/05/05
  • Shaft: 1/4 inches
  • Wires: Blue, Green, Red, Black

Its probably easier to just drive the old motors with my Zylotex drivers. Is it safe to just plug those motors in? Do I just pretend that the yellow is black or what?

Using a Stepper Motor as a generator

Pedal-A-Watt Stationary Bike Power Generator

I would like to make a human powered generator for an art project.

Challenge: I am curious if a couple of NEMA 34 motors is large enough to capture all the power that a human can generate.

I’m looking at a couple of applications.

1) To run a 120V toaster. I suspect this might need as many as 5 people to peddle. Also to run a 60W incandescence bulb.

2) To charge a 12V battery.

I’m suspecting that a stepper motor is a good candidate to make the electricity. I think the first part of the project is to make up some BOMs that show what motor to use, the RPM that it would require and parts for a rectifier and whatever else is necessary to operate in these applications.

Does anybody know of any existing projects or have any recommendations?

Richard Guy Briggs brought the Pedal-A-Watt Stationary Bike Power Generator to my attention (in the picture). I think if we could figure out what motor it is they are using for a generator, that might be the thing to get.

I just added another link below where the motor looks the same. They’re calling it an Oatley DC motor.

I found it here for cheap. Here’s another.

A nice 500W.

A nice 350W.

Here’s a DIY 1000W one.

Another DIY using Volvo parts (more).

I noticed they claim the Oatley works well in a windmill (which would be low RPM). Well that one claims it only got to 5V, but that’s pretty low RPM so this might be promising.