How much current to NEMA 17? February 15, 2018 05:27AM |
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Re: How much current to NEMA 17? February 15, 2018 06:00AM |
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Re: How much current to NEMA 17? February 15, 2018 09:10AM |
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Re: How much current to NEMA 17? February 15, 2018 11:55AM |
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Re: How much current to NEMA 17? February 15, 2018 01:22PM |
Registered: 6 years ago Posts: 15 |
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orbitalair
Anywhere from 0.5 to 2 amps. Since it was running at 1.5 its likely a higher rated one.
Current rating is related to price, cheaper is usually less current capable.
You could email them, or look up the number of the motor.
I am sure Prusa will tell you if they know(they should).
The idea is to tune them to the lowest current that does not cause skipped steps (to run cooler), but they can run safely to pretty warm temps.
In my experience re-invigorating the SmartRap Mini, there are a number of different types of tests you need to run to make sure its not skipping. i.e. a test cube might work great, but a full plate, or a large part, or a complex part might fail at some point.
Re: How much current to NEMA 17? February 15, 2018 02:06PM |
Registered: 6 years ago Posts: 109 |
Re: How much current to NEMA 17? February 15, 2018 02:13PM |
Registered: 6 years ago Posts: 15 |
Quote
orbitalair
Yes I would consider that too hot.
50C is pretty warm, but wont burn you, iirc many motors are rated to 80C, depends on the manufacturer.
Do you have a heated bed? set it to 40 or 50C and compare. Subjective of course, but close.
Re: How much current to NEMA 17? February 15, 2018 02:13PM |
Registered: 6 years ago Posts: 15 |
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vitorbrazil
Quote
orbitalair
Yes I would consider that too hot.
50C is pretty warm, but wont burn you, iirc many motors are rated to 80C, depends on the manufacturer.
Do you have a heated bed? set it to 40 or 50C and compare. Subjective of course, but close.
I use my heatbed at 70C, I guess my stepper was at 100C or something, I reduced it's current from 1.53 to 1.33, so that should yield about 20% less heat(using the squared rule), but I'm not sure that's enough, haven't tested it yet.
Re: How much current to NEMA 17? February 16, 2018 01:46AM |
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Re: How much current to NEMA 17? February 16, 2018 10:40AM |
Registered: 6 years ago Posts: 15 |