Motorshield v2.3 cooked out at 5vdc / 1.9A!

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problah
 
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Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

Has anyone else experienced this issue?

I was running 2 moon 17HD steppers, when I heard a crackle, looked over to the controller, and saw smoke come out of it. I immediately cut power.
I don't see any damage, but my power supply won't get it past 3 volts before it wants to spike to 2A.

The UNO is fine. It was not powering the board.

Thoughts?
I was planning on ordering another board so I can run three steppers for my project, but I'm a little concerned now.

Thanks,
D

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

Upon inspection, it looks like the TB435A1 for Stepper 2 has a wart in it. That sucks. This is the first time I've really had a chance to use this board. My current never spiked above its rating.

I don't have the soldering gear to replace that.

Well, dang.

D

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Franklin97355
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by Franklin97355 »

Could you post large (less than 1meg,~800x600), clear, detailed pictures of both sides of your board showing any soldering you have done and the connections to it?

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

20150726_234817.jpg
20150726_234817.jpg (455.42 KiB) Viewed 377 times
20150726_234807.jpg
20150726_234807.jpg (471.47 KiB) Viewed 377 times

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adafruit_support_bill
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by adafruit_support_bill »

What are the electrical specs of the motors you are using? The shield is only rated for 1.2A/phase.
https://learn.adafruit.com/all-about-st ... he-stepper

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

They are Moon 17HD's from my old cupcake printer. The specs for them are 0.3-0.5A.

D

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adafruit_support_bill
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by adafruit_support_bill »

The specs for them are 0.3-0.5A.
What is the resistance of each coil?

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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by adafruit2 »

Can you read any date code on the burnt out chip? does the same motor work on the other side of the shield?

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

I'll have to check when I am home. I'm on overnight business tonight.

Thanks,
D

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

I've got a shot here of the chip:
TB435A1
6612FNG

One looks cooked, and isn't working, but the board wasn't letting me get much voltage/current (it would start climbing past 1.2A after 2-ish volts) to it anymore, so I can't speak to the second chip.

D

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adafruit2
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by adafruit2 »

ok lets just try replacing it. let us know if that does/doesnt work :)
email support@adafruit

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problah
 
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Re: Motorshield v2.3 cooked out at 5vdc / 1.9A!

Post by problah »

Thanks! Will do!

I will also order the second one.

Thanks!
D

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