Bazmak-HELP blown up the lathe

[bazmak]

In the middle of rough turning a large item,flash bang both front and back
Checked motor and both boards for burn marks,seems ok
Fitted new fuse,turned on and bang new fuse exploded.Any advice
would be most helpfull from anyone in OZ who has a Sieg lathe
Dont know if it the board or motor.No chance to fix myself.
Repair,replace ?? after sales service etc where ?

 

[Blogwitch]

Baz,
I don't know how large your lathe is, but at times like this you might consider converting to an inverter and 3 phase motor.
I have one complete setup here for sale, but a little large for your needs, it has a 3 horse motor.

I am honestly being serious, by the time you have bought a new board etc, with a bit more cash, you could have a setup that controls a lot better, infinitely variable speed with power at all settings, and is actually virtually bombproof. I am soon going to be converting my lathe to one, but the 3 horse one I have is a little large, I need a 2HP system.

John

 

[Wizard69]

I just want to second what John has mentioned above, by the time you are done you would have been better off buying a 3 phase motor and inverter. Sadly Chinese motors and electronics on these low end machines leave a lot to be desired. Choose a motor of the right horse power and you can get a very wide range of usable speeds simply by varying a pot. I'd still maintain any back gear capability though.

At least here in the states the cost is very competitive with other options. 3phase motors are cheap relative to DC motors and the drives are very inexpensive these days. The only gotcha is that the real cheap drives are panel mount, you do pay more for a drive in a decent enclosure.

 

[rcfreak177]

Sounds like the motor driver board has crapped itself, This is common. Probably best to get it diagnosed properly though.

Hare and Forbes can help. They will most likely try and sell you a whole new machine. They sell Sieg machines re-labeled as Hafco

Little Machine Shop in the USA mate, They have a great range of parts for the Sieg machines. I am sure they will be able to source the parts for you and are great to deal with.

Here is a link to their Sieg lathe parts

https://littlemachineshop.com/products/product_category.php?category=5&First=M&Last=N

In saying this I do agree with the guy's above. I have also fitted VFD's and 3phase AC motors to my machines and never looked back or had a problem since.

Baz.

 

[goldstar31]

My curiosity finally got the better of me and in the past few days, I tried to buy a 7 x12( or whatever) with a blown motor/circuit board.
The cost was trifling but the despite several phone calls, the guy hadn't the common courtesy to reply. So be it!

Not quite because my time was not wasted as I have a little Unimat clone with a similar setup. A piddling little motor and control board. You never know?

As far as the 7 series is concerned , the faults are supposed to be poor Mosfets and rectifiers and are dirt cheap to replace if you add in a soldering iron. Again, the motors and boards have been improved.- or so they say.

In an E-mail to a regular correspondent to another frum, he said in reply. 'I've a number of repaired boards, you live next door or so to my daughter on Tyneside' , As simple as that!

Apparently, the information on 7 series lathes modifications and repair is overwhelming. Shame really, I was getting a bit 'Turned on'

Norman

 

[Tin Falcon]

I had a couple go the same way fixed the boards for ab out $10 each first place to look is the rectifier bridge diodes.
Ti There used to be a place or two in the states that would fix the boards. . IIRC the one guy retired and someone else started up a service center.

 

[Tin Falcon]

Gerling labs will repair them $ 50 flat rate + return shipping. . No charge for diagnostics if board not repairable. Medford Oregon USA.

http://www.repaircontrol.com/rc2.html

 

[V22]

You could try http://www.ausee.com.au - an Australian supplier of Sieg gear. I think they carry a fair amount of Sieg stock. They might be able to advise.

 

[///]

Hare and Forbes can help. They will most likely try and sell you a whole new machine. They sell Sieg machines re-labeled as Hafco

Not anymore.
I was told(while buying something unrelated) they are phasing them out and replacing with German 'Optimum' brand.
German because made in China.

Also told me they were better than Sieg and that their website was updated and I should check the spec's, which I did. The salesman obviously knows nothing about these small lathes. Their 7x equivalent size is very slightly cheaper, but almost every spec is worse in every way, the saddle is miniscule and it has MT1 spindle taper and 11mm bore, seriously?!!

A few bigger machines have since been added to the site, but just as I was about to check them, site told me it was down for maintenance... which seems to be every night at around 10pm... Why can't they do that at 2am when almost everyone is sleeping and site traffic is near zero?

http://www.machineryhouse.com.au/Centre-Lathes

 

[oldboy]

Barry.
How are you going with a fix for you lathe. Have you managed to sort it out?

Barry

 

[bazmak]

No not yet,i am currently modding the advance lathe,as long i can still turn chips i am happy.Very difficult fix here in Oz,no sevice whatsever
I did like the variable speed aspect but is it worth it ???
AC motor and backgears is far simpler.Will see

 

[goldstar31]

Hi Barry,

I've been playing about with a very cheap Mig welder. Finally, I found out what was wrong- there were TWO faults in the torch and it wasn't suitable unless a fool with my money converting it at more than a new machine to run 'gasless' Enough of me but I was looking on how people had modified their tool and cutter grinders. In this case, a Mk1 Clarkson ( I have one) but this one had a cheap Mig welder growing out of it. Obviously, it was a bit of lateral thinking going on.

If your Sieg motor is OK and merely your board gone, there must be a cheap answer for you.

I'll let you ponder that one

Regards

Norman