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Ouch, I’m sorry about that! Maybe you can ask Tolga about where did he get the motors for his Thor? I think that he’s from Turkey also.
If that’s not possible, I guess that a motor with a similar torque and dimensions may do the job, but it will probably require a redesign of some printed pieces…
Hi Angel,
unfortunately I couldn’t find Motor for Articulation 2 & 3 (only one available at aliexpress)
and the same problem for the motor for Articulation 4 & 5 & 6.
could you please suggest any possible alternatives?
Best,
Morteza<p>Ouch, I’m sorry about that! Maybe you can ask Tolga about where did he get the motors for his Thor? I think that he’s from Turkey also.</p>
<p>If that’s not possible, I guess that a motor with a similar torque and dimensions may do the job, but it will probably require a redesign of some printed pieces… </p>Hi Angel, aliexpress link for below motors is incorrect:
3 34 21.57 Articulation 4 & 5 & 6 Stepper Online, AliExpress
These motors have wrong length and I have just tried assembling them. Gonna try to return them. Maybe the item page has changed. Direct stepperonline link is fine.Hi, I’m so sorry!
Sometimes Aliexpress changes the products to which the links redirect and, although every so often I check that the products are correct, there are times that I do not arrive in time 🙁
I’m going to do a general review of all the links, just in case there is any other link that is not correct. Thank you very much for the warning!Hello Angel LM!
When I was looking at the BOM, I noticed that articulation 2 & 3 motors had a toque of 121.2 N.cm and a length of 34 mm and articulation 4 & 5 & 6 motors have a torque of 26 N.cm and a length of 34 mm. According to the BOM, articulation 1 motor has a length of 40 mm, and a torque of 40Ncm. When I clicked on the link that you included in the post for articulation 2 & 3, the holding torque without gearbox was 25Ncm(31.2oz.in) and had a length of 34mm. Additionally, the link for articulation 4 & 5 & 6, the holding torque was 26Ncm(36.82oz.in) and had dimensions of 42x42x34 mm. Additionally, the link for articulation 1 motor stated that the holding torque was 40Ncm and the dimensions were 42x42x39 mm. For all the motors, I noticed that the current(A) was 0.4 but I could not find where the voltage was listed. I just wanted to clarify that the links to the motors you provided were the correct ones. Thank you!
Wren
Hello Ángel LM!
I was just wondering if you saw my last post regarding motors. Thank you!
Best,
WrenHi!
Sorry for the delay in replying, I’ve been a bit disconnected for a few months.
I have just checked the BOM links and I can assure you that the motors to which these links redirect are the correct ones at this right moment.
It draws my attention the case of geared motors, that apparently the manufacturer has replaced the total torque value given by the set of gearbox and motor by the torque value of the motor without gearbox. However, the gearbox being a 5:1, multiplies approximately by 5 the 25Ncm of the motor without gearbox, obtaining approximately the old 121Ncm.
About what you say about the specification of the supply voltage. Stepper motors generate torque by controlling the current in their coils, not directly with the voltage. Drivers are responsible for regulating this current, using a supply voltage (within their range) to be able to “push” the desired current to the motor. Therefore, the supply voltage is more of a driver specification than an inherent limitation of the motor itself.
Hope it helps!
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