Motor Shield Ugly burn
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Please be positive and constructive with your questions and comments.
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Motor Shield Ugly burn
My new Motor Shield seems to get an awful power burn. See Pic. It was connected to 2 stepper motors ( Pics) nothing unusual. None of the TB6612 MOSFET suffered but the IC in the middle "CDH653" was hit badly. What happened?
- Attachments
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- it was feeding 2 steppers= to track the position of the sun
- 2steppers.jpg (233.02 KiB) Viewed 773 times
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- central IC is dead
- MotorShieldBurnt.jpg (372.71 KiB) Viewed 773 times
- Franklin97355
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Re: Motor Shield Ugly burn
What are the specs on the motors and what were you powering them with?
- adafruit_support_bill
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Re: Motor Shield Ugly burn
The IC in the middle is the PCA9685. That chip is a PWM controller and operates at logic levels to drive the H-Bridge chips. There is no motor power going through it.
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Re: Motor Shield Ugly burn
It was powering 2 standard Stepper motors type 42BYxxx. It had a separate power supply (jumper removed) of 5 V. Maybe that was the problem as the stepper voltage is 12 V? Should I feed the motor shield with 12 V instead of 5 V?
- adafruit_support_bill
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Re: Motor Shield Ugly burn
Under-powering a motor is not going to cause any problems - other than less torque from the motor. What is shown on the photo does not appear to be a 'burn' and is not in an area of the board that carries motor power.
Can you get a closer detail of the discolored area around the chip?
Can you get a closer detail of the discolored area around the chip?
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Re: Motor Shield Ugly burn
Here is a close view of the central IC. It had some white fluff on it, that I cleaned up in the middle. It seems burnt out and that's strange as there is no much power going through it.
- Attachments
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- Motor Shield Cointrol IC Burnt
- motorShieldburnt.jpg (376.41 KiB) Viewed 684 times
- adafruit_support_bill
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Re: Motor Shield Ugly burn
That looks more like corrosion than heat-damage. Was the board in a location where something may have dripped on it?
- adafruit2
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Re: Motor Shield Ugly burn
Woah, that's quite a bit of corrosion. Did it show up from adafruit like that? It would surprise us if it passed QC!
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Re: Motor Shield Ugly burn
The board was always inside on my table, no spill and I don't think that's how it was when I've got it from Adafruit a month ago. If you want, I can send it back to Adafruit so you can have a better look at it.
- adafruit_support_bill
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Re: Motor Shield Ugly burn
If you contact [email protected] with a link to this thread we can send you a replacement. I spoke with the production folks and we don't need to get the old one back.
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Re: Motor Shield Ugly burn
will do.
Thank you
Thank you
Please be positive and constructive with your questions and comments.