Broken Midi

[Fezbollah]

So I'm pretty sure I've overloaded my 110v midi by doing something silly with my big Dewalt 780 hooked up to it. Has anyone done this and worked out how to fix it. I'm hoping there's an easily found fuse inside that I can swap out rather than springing for a new motor.

Anyone got any tips?

Fez xx

 

[AlexThePalex]

How exactly did you overload it? Tell us a bit more about what you were doing and what you think went wrong.

There's no fuse inside you could replace, so unfortunately it's not going to be that easy.

Are you sure the motor is broken? There are two parts inside the Midi that can break, the motor or the electronics board. I don't know what you mean exactly with "overloading", did the vac get too hot or did it get too much current?

I recently had to repair my CTL Mini vac, it just quit on a hot day. I took it apart entirely, and luckily I found that only the mains cable was broken. But before I got there I tested the motor and the electronics board to see if they were faulty. You can connect the motor directly to mains power to see if it works or not (at least, I could with my 220v model, I don't know if there's any weird stuff going on with 110v that might prevent this).

 

[Fezbollah]

I was ripping a 2" packer off of some 8x2 so the saw was going full tilt as was the vac. I'm guessing that I've run too much current as the U.K. version 110v midi power output is only rated at 500W as I understand it.

Guess I'll just crack it open this week and see what's fallen off. There was no burning smell though. I'm hoping it's a component that I can replace myself

 

[Davej]

I was ripping a 2" packer off of some 8x2 so the saw was going full tilt as was the vac. I'm guessing that I've run too much current as the U.K. version 110v midi power output is only rated at 500W as I understand it.

Guess I'll just crack it open this week and see what's fallen off. There was no burning smell though. I'm hoping it's a component that I can replace myself

Ignore the silly sticker even Festool UK told me to ignore it.
I've been running an 1800 watt saw and router ( not at the same time ) through my midi for years no problem and only on a 3.3kva tranny.
You must have an issue somewhere else.As Alex said check the wiring , or the tranny
Hope you get it sorted.
Dave

 

[Fezbollah]

Yeah me too. I run the big saw and a 1/2" router through it as well. The only thing I've not checked is the particular socket that the vac was plugged into. Everything else still works. Luckily I'm not working in anyone's house for a while and was only running it to save on tidying up. Thanks for your help.

 

[AlexThePalex]

If you're in the UK, don't your power cords have a plug with a fuse in it? Might be worth checking first.

The Midi is easy to disassemble, and it is easy to swap parts. But if it's the motor or electronics board, it can be costly.

You can find your Midi's spare parts and an exploded view from the link on this Festool page.

I'd start by connecting a spare power cord to see if that isn't the problem, then take out the motor and see if it still runs when connected directly to 110v. If that's ok, connect the electronics board again and see if you can run the motor through that.

 

[sancho57]

So I'm pretty sure I've overloaded my 110v midi by doing something silly with my big Dewalt 780 hooked up to it. Has anyone done this and worked out how to fix it. I'm hoping there's an easily found fuse inside that I can swap out rather than springing for a new motor.

Anyone got any tips?

Fez xx

Yea Call Service and see what they think

 

[carlb40]

If you're in the UK, don't your power cords have a plug with a fuse in it? Might be worth checking first.

The Midi is easy to disassemble, and it is easy to swap parts. But if it's the motor or electronics board, it can be costly.

You can find your Midi's spare parts and an exploded view from the link on this Festool page.

I'd start by connecting a spare power cord to see if that isn't the problem, then take out the motor and see if it still runs when connected directly to 110v. If that's ok, connect the electronics board again and see if you can run the motor through that.

No, the OP states he is using 110v tools, so apart from the standard uk 3 pin plug ( which will be fused) on the  transformer, there will be no other fuses on tools or leads. 

 

[Fezbollah]

Fixed it!  [big grin]

Well, my electrician friend did it while I fitted some skirting board in his house today!

The mains cord was broken at the point where it comes out of the main body of the vac. Near as we could work out, the cable was slowly damaged by the action of the vac bumping against the bulkhead of my van where it sits in transit. It took about two years I reckon!  Only the live was intact when he tested it. Running the saw hard must have heated what was left of the intact copper wire in the earth and neutral to the point that it broke down. I don't know, electricity is witchcraft anyway.

So now the cord is a foot shorter and the midi faces forward on its shelf. A cautionary tale!

Thanks for the input from everyone.

 

[joiner1970]

Fixed it!  [big grin]

Well, my electrician friend did it while I fitted some skirting board in his house today!

The mains cord was broken at the point where it comes out of the main body of the vac. Near as we could work out, the cable was slowly damaged by the action of the vac bumping against the bulkhead of my van where it sits in transit. It took about two years I reckon!  Only the live was intact when he tested it. Running the saw hard must have heated what was left of the intact copper wire in the earth and neutral to the point that it broke down. I don't know, electricity is witchcraft anyway.

So now the cord is a foot shorter and the midi faces forward on its shelf. A cautionary tale!

Thanks for the input from everyone.

I was just reading this thread and about to say check the cord. The exact same thing happened to my 110v midi. A very easy fix.

Sent from my ALE-L21 using Tapatalk