[Christian Knüll]

Hi,

"dl" means "overcurrent" for most chinese spindles.
The part may be a self resetting fuse - but without identification numbers it can be basically anything.

However: the blown part is most likely the result but not the cause of the problem. I'm quite sure that even if you manage to get a replacement it will blow again.
Check the spindle for shorts agains each phase and housing. This is however hard to impossible to to with a cheap multimeter - it is better to give it to someone with a proper insulation tester.

(and be careful with VFDs - they can kill you)

Christian

[kostas1]

Hi,

"dl" means "overcurrent" for most chinese spindles.
The part may be a self resetting fuse - but without identification numbers it can be basically anything.

However: the blown part is most likely the result but not the cause of the problem. I'm quite sure that even if you manage to get a replacement it will blow again.
Check the spindle for shorts agains each phase and housing. This is however hard to impossible to to with a cheap multimeter - it is better to give it to someone with a proper insulation tester.

(and be careful with VFDs - they can kill you)

Christian

Hi, thanks for the quick reply.
What do you mean by 'housing'?
The power wiring of the VFD to spindle is the following: I wired the U,V, and W VFD outputs to the 3 pins of the spindle and I left the pin 4 non-connected.
Could it be this the cause ?
Also the ground terminal of vfd has been connected to the ground from the wall.

Thanks again.

[Christian Knüll]

Hello,

What do you mean by 'housing'?

Well, the spindles housing or "body" - basically the whole outside of the spindle...

The power wiring of the VFD to spindle is the following: I wired the U,V, and W VFD outputs to the 3 pins of the spindle and I left the pin 4 non-connected.
Could it be this the cause ?
Also the ground terminal of vfd has been connected to the ground from the wall.

No - but you're playing with your life if you just ground the VFD but not the spindle itself...
Again: VFDs can kill you - even if disconnected the input capacitors may still be charged to about 325V for a while.
I'd also not rely too much on things some guys tell you over the internet if you're not familiar with this kind of equipment.
Give both spindle and VFD to an electrician - he has the equipment to see what is defect and whether it makes sense to repair or not.

The part is most likely a varistor like Al_The_Man said.


Christian

[kostas1]

No - but you're playing with your life if you just ground the VFD but not the spindle itself..
Christian

So you suggest that I should also use the pin 4 of spindle and ground it using the ground pin of vfd?
Thanks.