Burnt motor on Magma Bullet Master?

[JonB_in_Glencoe]

The "speed" potentiometer has a white cable, follow that to the motor controller. The controller may not look like the one I posted a link to, that is just one style, probably the most popular style.
Anyway, it's either in the middle bottom box, or somewhere else.
I am unfamiliar with the Magma Bullet Master.

[hunter74]

The "speed" potentiometer has a white cable, follow that to the motor controller. The controller may not look like the one I posted a link to, that is just one style, probably the most popular style.
Anyway, it's either in the middle bottom box, or somewhere else.
I am unfamiliar with the Magma Bullet Master.

Thanks!

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[hunter74]

Found the control box for the motor. Must be this right? Any measurements I can take with a multimeter to chech if it's fried?

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[popper]

Nope, no measurements, brushless DC gear motor. Output transistors may be fried. I'd check the user group for recommendations.
Delete my comments. single phase motor, PWM controlled. Thought it was multi-phased.

[JonB_in_Glencoe]

Found the control box for the motor. Must be this right? Any measurements I can take with a multimeter to chech if it's fried?

No, I didn't wait a whole day but 2 hours. That didn't work, the fused tripped again and it made a rattling sound. I could try to plug it in tomorrow and see
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I don't think you'd hear a rattling sound if the controller was fried. But, if you understand electricity, you can disconnect the motor wires from the controller at terminal A1 and A2. Then attempt to power it up. You should have 0 to 90 volts DC at those A1 and A2 terminals, varying with the "speed" knob position. You may need to have the multi-meter set to AC, because the 90 volts DC is actually a pulsating DC and without the motor connected to smooth that out, it may not read DC volts, but may read as AC volts.

[hunter74]

Between a1 and a2 it measures 103 Vac no matter what speed it is on

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[JonB_in_Glencoe]

OK, that's the pulse height...I guess that doesn't change, but what does change is the width of the pulse on the high side, as the speed dial increases. So anyway, if the controller was fried, that would have been zero. Do you get any reading of DC volts with the dial at MAX speed ?

[hunter74]

OK, that's the pulse height...I guess that doesn't change, but what does change is the width of the pulse on the high side, as the speed dial increases. So anyway, if the controller was fried, that would have been zero. Do you get any reading of DC volts with the dial at MAX speed ?

It measures 150Vdc. Is that right? I get the same reading no matter what the speed controller is set at

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[JonB_in_Glencoe]

I would think the value would change, but maybe there is something I am over looking? I'm not sure what else to tell you, except, I don't know if that is right?

[j4570]

There appear to be a direct part number cross on EBay for $1000+

There is also this but I’m not sure if it’s correct I’d want to see the whole motor tag and do a little checking if it will fit:
https://www.ebay.com/itm/27641001558...mis&media=COPY

[j4570]

Here is one with the Mirarik Part Number. Has some kind of shaft adapter on the end.

Again, no experience with these sellers. You just don’t have many options when trying to buy one of these.

https://www.ebay.com/itm/36413315197...mis&media=COPY

[j4570]

Actually that Dayton Motor is available from Zoro new for under $500. That may be better since it’s new. Only problem is Zoro doesn’t export and Grainger only sells to businesses.

[Michael J. Spangler]

Always worth checking surplus center for motors!!

[M-Tecs]

Actually that Dayton Motor is available from Zoro new for under $500. That may be better since it’s new. Only problem is Zoro doesn’t export and Grainger only sells to businesses.

They changed that at least ten years ago however they have two tier pricing, and the differences can be significant.

https://www.toolsadvisor.org/can-any...0at%20Grainger.

[j4570]

Thanks for clarification on Grainger. I hadn’t tried in a while. Zero is owned by Grainger and usually cheaper. And your stuff ships from Grainger.

To the original poster, let us know how it works out.