Dead VFD

[cropwell]

It's good to have a spare but remember to follow the procedure for capacitor conditioning if it gets left on the shelf for a long time before use,

- Nick

As I understand it, conditioning an electrolytic means charge and slow discharge for a number of cycles. Sometimes difficult when the component is in circuit. I tried to find out the recommended parameters, but there has been little or nothing posted on t'Interweb.

Nick, Can you give us some pointers to the procedure for in-circuit ?

Ta,

Rob

[Graeme]

For capacitors made in the past 20 years you do not need to condition them after a period of not using them. For an explanation as to why have a look here https://en.wikipedia.org/wiki/Alumin...rage_or_disuse
In most cases it is impractical to do this process on equipment without a major dismantle, which may cause additional damage.
Graeme

[charlieuk]

so i used the machine today for about a hour and its worked perfect, the spindle was fine and did not do anything out of the ordinary! so the mystery is still out there!

[JAZZCNC]

so i used the machine today for about a hour and its worked perfect, the spindle was fine and did not do anything out of the ordinary! so the mystery is still out there!

Could have been it over heated and shut down so check the fan and venting.

[Doddy]

so i used the machine today for about a hour and its worked perfect, the spindle was fine and did not do anything out of the ordinary! so the mystery is still out there!

Check for burnt-out spiders in the VFD :)

[magicniner]

For capacitors made in the past 20 years you do not need to condition them

The Siemens Micromaster 440 is considerably less than 20 years old and yet -

page 23 - https://inverterdrive.com/file/sieme...ter-440-manual

I would always recommend reading Manufacturer's Manuals rather than relying on a quick Google where mains voltages and complex systems are concerned ;-)

- Nick

It's been brought to my attention, again, that this is not the case for most electrolytic capacitors so thinking Siemens might be a one-off I checked the manufacturer of my nearest tot the door non-Siemens drive (ABB on my 3hp mill/drill) and found this -

https://library.e.abb.com/public/cf2...ming_Rev_G.pdf

Mitsubishi and Omron seem to suggest inspection & testing prior to installation.
In short RTFM as Wikipedia and Google might be right or it might just get you some magic smoke ;-)
Enjoy!