it turns out that 38v comes to the X360 (AC40v input transformer for brake power supply) and DC 24v does not come out with the X361 (Brake power supply output 1TV board X320 in MC unit)
E1337 + E1342 (E-controller)
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Schalk -
September 15, 2022 at 9:18 AM -
Thread is Unresolved
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Sounds like 1TU is buggered inside the MC Unit.
Either get a replacement 1TU or the MC Unit completely.
Both are available as spare parts from Kawasaki.
X360 goes into the rectifier circuit to produce the brake and fan supplies.So unless a fan/motor brake/external harnessing/robot internal harnessing is shorted out, then the issue is local to the MC Unit.
FYI, it is nothing to do with encoder batteries being flat, replaced or ANY encoder related fault. -
1TV board controls brakes to the motors.
1TV board is where the brake abnormality error is generated from.
1TV board is supplied from X361.
X361 is the output from the rectifier of the 1TU board.
Rectifier of 1TU board is supplied with 40vac on X360.
If X361 does not have juice on it, 1TV will report brake abnormality error and manual brake releases will not work and also strange occurrences with fans when you power off the controller.
Unless you have external harnessing to robot/internal robot/motor brake issues in the field dragging the supply down (easily ruled in or out by disconnecting controller from robot), then it's pretty simple.
I cannot be any clearer on this point - everything you say points to 1TU board.
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when disconnecting the robot from the controller, the errors remain the same
the axis 1 does not respond to pressing the "release brake" buttons, there is no click
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So it's localised to the controller then.
MC Unit > 1TU board.
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I refer all the way back to my post #4 back in September last year:
PostRE: E1337 + E1342 (E-controller)
E42 controller is a current model, so complete spares still available.
Depending on your location, your local Kawasaki distributor should be able to provide spare parts.
MC Unit 1TU board X360 connector is single phase LV from secondary of transformer for brake power.
Brake power internally also supplies fan circuits and other electronics.
If incoming supply phase is lost, could result in LV not available and brake power error.
If internal MCB (CP1) trip activated, the LV not available and brake…kwakisakiSeptember 15, 2022 at 12:27 PM -
I refer all the way back to my post #4 back in September last year:
PostRE: E1337 + E1342 (E-controller)
E42 controller is a current model, so complete spares still available.
Depending on your location, your local Kawasaki distributor should be able to provide spare parts.
MC Unit 1TU board X360 connector is single phase LV from secondary of transformer for brake power.
Brake power internally also supplies fan circuits and other electronics.
If incoming supply phase is lost, could result in LV not available and brake power error.
If internal MCB (CP1) trip activated, the LV not available and brake…kwakisakiSeptember 15, 2022 at 12:27 PM I know this problem and user. It is hard to get spare parts in Russia for now
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dm.bogachev Ah right, could be difficult then......Thanks for mentioning.....👍
If I recall correctly, the 1TU board has a couple of power transistors that are under the board attached to the heatsink, I’m sure one or both are part of the switched mode rectifier for the brake supply, they are usual components to fail on 1TU board.
I think they are 3 pin FET’s so you will need to remove from the board to test them effectively...
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- Best Answer
So it's localised to the controller then.
MC Unit > 1TU board.
In the end, everything ended well. The problem was in the section of the 1TU board between X360 (40 volts of AC voltage comes to the board), and X361 where 24 volts of DC voltage comes out after rectification. several elements burned down, after replacement everything worked. Thanks for the tips
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Excellent news.
dm.bogachev mentioned obtaining replacement board(s) may be difficult at present, so I hope the additional information assisted in your issue.
Glad you've managed to get it repaired successfully and now have operational system.
Thanks for feeding back your success, your information will help others if they experience similar issues.
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