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Topic-icon Repairing a Roboteq Board

  • benchambers
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13 years 9 months ago #10561212 by benchambers
Repairing a Roboteq Board was created by benchambers
So... we have the Roboteq board controlling two linear actuators, with potentiometers to measure position. We had everything set up correctly for closed loop position control, and even had Roborun controlling the position (we have code to control things in general, but we wanted to use Roborun to play around with the PID settings). We were testing the various position values, and took one of the linear actuators down to -127 (which it did just fine), and then took it back up to like -90. We then set it to -60, and something blew out.

Looking at the board, one of the pieces was physically moved from its position on the board. Looking at the arrangement, it looks like there are four of these for each of the output channels, so I suspect that it was part of the H-bridge.

Is this repairable, and if so how?

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  • benchambers
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13 years 9 months ago #10562107 by benchambers
Replied by benchambers on topic Repairing a Roboteq Board
Looking at the component we are sure was blown, it has the following written on it:

F14055
IRF 520C
91A7

As far as I can tell, this is an IRF1405, and it should be possible to just put a new one into the board... is this correct? What are the chances that this is the only thing that we blew?

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  • cosma
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13 years 9 months ago #10563516 by cosma
Replied by cosma on topic Repairing a Roboteq Board
<P style="MARGIN: 0px">The controller's H-bridge is obviously damaged. When this happens it is quite common that the damage has spread to other components. in the circuit, including the MOSFET driver. Repairing is possible but quite tricky because if you leave one component bad, it may damage the bridge next time is it run.
<P style="MARGIN: 0px">
<P style="MARGIN: 0px">We offer repair services. Please contact us directly via <A href=" dev.roboteq.com/dev1/contactus.html " target=_blank> dev.roboteq.com/dev1/contactus.html </A>

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  • RogueWarrior
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13 years 9 months ago #10607275 by RogueWarrior
Replied by RogueWarrior on topic Repairing a Roboteq Board
I hate the smell of burning electronics in the morning. ;-)

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