Hello, Arduino newbie here.
I am taking over a project involving moving an object using a threaded actuator rod. I use an Arduino Mega 2560, a Usongshine 4 Lead NEMA-17 Bipolar Stepper Motor (rated at 3.5 V, 1.5 A) with a Pololu DRV8825 driver.
The project requires that we replace the stepper motor with one designed for UHV and I have a couple of steppers in mind:
D42.3 by Arun Micro https://arunmicro.com/products/uhv-stepper-motors/
Obviously, these are quite expensive and I want to make sure I'm not overlooking anything critical before placing an order.
For one, I was wondering if I can still use my Mega with the DRV8825 driver to control this UHV stepper?
Your first link does not work for me and the second link does not seem to provide the details that one would expect for "ordinary" stepper motors - such as the number of electrical connections, the coil resistance and the coil current.
This seems to be a very specialised application. I suggest you seek the information you require from the manufacturer.
Weird, the page seems to be down. But I can provide details. It has rated current of 1.2 A and rated voltage of 6.8 V. 4 electrical connections and no thermocouple wires.
For the second link, I have attached the datasheet here.
The website has links to their own stepper motor drives (attached datasheet as well) but they seem to be standalone units that provide an RS232C interface for computer control. I’m not entirely sure I can interface the SMD with my Mega.
So if I could get away with using my current DRV8825, it would be ideal.
And yes, I will also email the manufacturer.
Datasheet_VCSM.pdf (301 KB)
Datasheet_SMD210.pdf (222 KB)
The motors in your PDF seems to have the normal connections and, a 1 amp coil current is well within the capacity of a DRV 8825.
But please don't complain to me if you invest £800 in the motor and it does not work.
Fair enough. Thank you for responding!
So if I'm understanding this right, if the current requirements match, I can in theory couple any bipolar stepper motor with the stepper driver. Is that right?
Ultra high vacuum only limits the materials used in the motor (for instance standard PVC wire insulation
is a complete no-no as its full of volatile plasticizer molecules, and the bearings need to be special)
Everything for high vacuum has to be out-gassed too.
There's nothing different about a motor in a vacuum electrically, its still coils of wire, laminations and a rotor!
For a high voltage motor in a low vacuum, there are all sorts of issues with corona discharge, but that's a
But I can provide details. It has rated current of 1.2 A and rated voltage of 6.8 V.
Steppers don't have a voltage rating, I think they mean its 1.2A and 5.7 ohms, and the inductance is