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Replacing the control board

 

Replacing the control board with or without replacing the motor.?
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I like matching the control board the the motor.
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I found most control boards fail because either dust or pood design.
Next is owner playing with board.
Voltage spikes can be problem in some location but power strip with protection should work.
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I found yearly cleaning of boards exstens the life includes my mini lathe control board,? welders , PC tower and? my home's AC??
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Please comment on your experiences with boards.
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{The DC motor have about 6 adjustments .
Most mini lathes I seen only has 3 you can adjust
1. Low speed
2. High speed
3 . Max Torque.
The rest are per set on board like
4. Torque acceleration
5. Breaking
6. Slope speed increase
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There some boards 6 adjustments
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1. Low speed
2. High speed
3 . Max Torque.
4. Torque acceleration
5. Breaking
6. Slope speed increase
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There are are few more but almost never seen or better way not need a engineering going wild.
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The brushless has about same thing but a little different
Like speed increases is slowly increasing the frequency.
I know more but have had must do with brushless.}
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Dave?
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While the driver transistors and their heat-sinks for PWM-style motor controllers dissipate relatively little power, they DO dissipate some.? Being covered with convection-preventing stuff (the infamous "dust bunnies") isn't good for their long-term longevity.
 

Years ago, I did a modification to my control board. To prevent swarf from getting to the board, I fastened a piece of clear plastic (the kind used on report covers) about an inch away from it with RTV silicone.? And I had already drilled these screened ventilation holes in the section of the cover next to the board.?

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So after these two modifications, my board has been protected from both swarf and dust bunnies, but it still gets adequate ventilation.

Mike Taglieri?


On Sun, Jul 21, 2024, 10:59 PM Mark Kimball via <markkimball51=[email protected]> wrote:
While the driver transistors and their heat-sinks for PWM-style motor controllers dissipate relatively little power, they DO dissipate some.? Being covered with convection-preventing stuff (the infamous "dust bunnies") isn't good for their long-term longevity.
 

Like air venting?
Thank you for the great photo.
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This for DC brush motor controllers I do not know brushless motor it probably has this adjustment too.
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You do lot with adjustment on board.
The torque / amps can adjust.
From as add more torque the motor slows
To as add more torque the speed increase hard stop spindle and will give a lot of torque.

On our lathes should adjustment so speed stays the same at any torque.
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Dave?
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On Sun, Jul 21, 2024 at 11:17 PM, Miket_NYC wrote:

Years ago, I did a modification to my control board. To prevent swarf from getting to the board, I fastened a piece of clear plastic (the kind used on report covers) about an inch away from it with RTV silicone.? And I had already drilled these screened ventilation holes in the section of the cover next to the board.?
?
?
?
So after these two modifications, my board has been protected from both swarf and dust bunnies, but it still gets adequate ventilation.
?
Mike Taglieri?

On Sun, Jul 21, 2024, 10:59 PM Mark Kimball via <markkimball51=[email protected]> wrote:
While the driver transistors and their heat-sinks for PWM-style motor controllers dissipate relatively little power, they DO dissipate some.? Being covered with convection-preventing stuff (the infamous "dust bunnies") isn't good for their long-term longevity.

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