Hello,
I have this stepper motor from this shop, same serial number and same rating but different model from the picture in the page. The model i have a smaller connecter from the motor side and the wires are: Red, Yellow, Green and Blue.
It is rated as follow:
2.1V
1A
1.8 degree step angle
1.8 N.m holding torque
So I have these questions please:
1- I saw tutorials on youtube with the wires having black as one of the four, the blue wire is the GND on my model which doesnt have black?
2- which driver can i use for this stepper ? example please
3- regarding 1A, so it will draw 1A for it to run at 1.8 N.m torque ?
That's a bipolar stepper rated at 1A and 2 ohms, and an unknown inductance.
Steppers like this are current/chopper driven and don't have a voltage rating. The inductance
dominates behaviour in such motors, which is why this motor could be powered from
24V or more using a chopper driver - the resistance is of little concern
You use a current driver like a DRV8825 or A4988 for such motors.
You'll need to check how the windings are wired in your motor with a multimeter
to ensure you connect it correctly - guessing could blow up the stepper driver, so
don't guess.
Stepper drivers need to have their current set correctly before use, there are many guides
out there depending on the precise module.
The stepper driver is a power converter, so if the motor is drawing 1A, the driver may be
drawing much less current from the supply.
The 1.8Nm rating is a misprint, a motor that size is typically more like 0.18Nm You'd need
a NEMA23 or similar to get to that kind of holding torque.
Dynamic torque is much less than holding torque, note, and depends on speed and supply
voltage - good datasheets give graphs of dynamic torque.
MarkT:
That's a bipolar stepper rated at 1A and 2 ohms, and an unknown inductance.
Steppers like this are current/chopper driven and don't have a voltage rating. The inductance
dominates behaviour in such motors, which is why this motor could be powered from
24V or more using a chopper driver - the resistance is of little concern
You use a current driver like a DRV8825 or A4988 for such motors.
You'll need to check how the windings are wired in your motor with a multimeter
to ensure you connect it correctly - guessing could blow up the stepper driver, so
don't guess.
Stepper drivers need to have their current set correctly before use, there are many guides
out there depending on the precise module.
The stepper driver is a power converter, so if the motor is drawing 1A, the driver may be
drawing much less current from the supply.
The 1.8Nm rating is a misprint, a motor that size is typically more like 0.18Nm You'd need
a NEMA23 or similar to get to that kind of holding torque.
Dynamic torque is much less than holding torque, note, and depends on speed and supply
voltage - good datasheets give graphs of dynamic torque.
thank you for the clarification, clearly there is mistakes in the datasheet, but i can't find for this model any datasheet !
MarkT:
Then you could opt not to buy it, and reduce your risk.
unfortunately i did, because i bought this years ago, i had no idea lol i thought that any small stepper would work
at the shop i bought it from, they have this driver DRV8825 so i will buy this one and ask them for clarification about the leads because their datasheet is wrong or new for the newer version
