Hi, I have a stepper motor driver that is similar to the one used in this guide:
Mine has the pinouts mirrored but also lack the on board potentiometer.
Can I just use the tutorial above but skip the potentiometer adjustments, or what?
All good,
N.
Is the chip a A4988? I cant tell from the pic.
I believe that module has VREF where the MS3 pin normally is. So you need to provide a suitable VREF externally I guess.
Otherwise it appears to be the same as typical Pololu style drivers.
Thank you. To me it seems the chip is lableled 4988 ET.
Ah, yes, I think I came across something about that this module can not do 1/16 steps. And the pin where M3 would be starts with "V", the rest is covered by the heatsink.
So I would just connect 5v out from the arduino to the modules V[REF]?
Unfortunately no, the formula is Vref = Imax * 8 * Rs Rs is the value of the sense resistor which on your board appears to be 0.270 Ohm. So for a 1 amp current limit Vref should be about 2.16V.
If you connect a 10k trimpot, adjust the resistance until you get the required Vref.
See Ardufocus | A4988 motor current tuning
You need to connect the pot as shown for R8 in the diag. Vdd would be 5V
No.
Unless you know what you are doing, I recommend that you use the same exact components and the same code as used in the tutorial, that also includes the motor and power supplies.
Thank you so much. The motor I will use wants 5v/1.9A
The external power supply give 5.7v/3A
I also have this board, Adafruit TB6612
I have several of the stepper boards, I can afford losing one. But only one motor.
Could I also power the arduino with this power supply or do I need another, separate one?
Does that motor have more than 4 wires?
Never used an 8 wire model
I would only be guessing on how to use it and what voltage and current is actually needed.
Ok. What could happen? A likely error and the worst ever senario? This is a prototyping project only. I will not be able to buy new gear for this project.
I got the exact tutorial for the adafruit:
However this board has a lower max amp than the other. I start out with trying this one.
I have this motor also, smaller one. It has 8 cables going out but only 4 connected. It has no labeling anywhere.
Hooking up the coils wrong and burning out the motor, driver and possibly the power supply
https://www.google.com/search?q=step+syn+103-8075-2
The same company has a different model with wiring like this:
-- https://www.tme.eu/Document/48ac9f8512124ec9a791d3759c517a64/sanyo-motor.pdf
8 wires on a stepper gives you lots of options. That they connected pairs together into a 4-conductor housing makes some choices for you.
Looking at the CNCSourced guide my conclusion is that it must be a bipolar parallel wiring because it is the only one having all connectors going in in pairs. Bipolar parallel should work with the Adafruit guide.
Stand by for launch, and take cover.
EDIT: It works! Thank you all, I'll mark it solved.