Wiring is confusing...

1. ## Wiring is confusing...

I have 3 tb6600 stepper drivers to wire up to some nema 23 motors(2.3V at 2.8A, inductance of 2.2mH)and basically I have no idea about how to connect anything. I was watching This Old Tony and he mentioned using 1/3 or 2/3 of the rated amperage(through the driver) for the motor to run properly. This entire time I assumed that I would be setting the driver at the 2.8 amps that the motor is rated for, but now I'm all messed up for wiring. Anybody out there who could explain this to me?

2. ## Re: Wiring is confusing...

This Old Tony and he mentioned using 1/3 or 2/3 of the rated amperage(through the driver) for the motor to run properly
I love This Old Tony ! Was he referring to a minimum ? It could have been specific to his motors as well. With a decent drive that shouldn't be a maximum with a suitable motor. Then again this is a tb6600 so who knows ?
For example Gecko sells 3.5 A/phase steppers for use with their 3.5 A drives.
You could try a low setting and raise current until motors get unacceptably hot. Don't do this to the point the motor melts

Anybody out there who could explain this to me?
I am really not that guy but now your thread got a ^BUMP^ .
Many people have bought these tb6600's so maybe one will weigh in.

3. I did a bit more looking around and found a "Step Motor Basics" article on Gecko's site. It says "A motor control will always draw less than 2/3 of the motor’s rated current when it is parallel (or half-winding) connected and 1/3 of the motor’s rated current when it is series (or full-winding) connected." So I guess I should still have the output of the driver at 2.8A and it just means that the driver itself won't draw 2.8A from the power supply? I have until tomorrow morning to wire everything up so I guess I will have to do more research and Sonic my way out of this. Thanks for the reply!

4. ## Re: Wiring is confusing...

Parallel is the common way but that explains where the 1/3 number comes from. The 2/3 draw figure is new to me but second guessing the Gecko folks would be a losing proposition
If the concern was having too many amps available on the power supply, it doesn't matter. What Gecko is saying is there's nothing gained from more as far as the drives are concerned.
For the setting on the drive itself it might be safest to start conservative. One reason is the tb6600 current reduction at idle may not be as clever as a Gecko.
Reducing current won't do harm beyond some torque loss.

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