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----- Original Message -----
From: "born4something" <ajs@...>
To: <7x12minilathe@...>
Sent: Wednesday, April 04, 2007 12:00 AM
Subject: [7x12minilathe] Re: Mini-lathe controller rectifier question


Hi Alan,

These things are often chassis mounted for heatsinking. Hence the
bolt hole in the middle. That's why Jim was making a point of saying
you needed a device that would be well within its ratings as your
application doesn't have it bolted down. If you like (and have
space) you can bolt a small heatsink to it or even extend it on
longer wires to mount on the casting. However, the usual approach on
a PCB is to simply use an over-rated device - they're pretty cheap.
If it just blows again you likely have some other issue causing it.

John



--- In 7x12minilathe@..., "Alan Reeves" <goatfarm@...>
wrote:

Thanks for the responses. The rectifier I bought was a NTE53004

which

looks like it will handle 1000v and 10A, but what threw me was the
different form (this one has a hole in the middle) I will look on

the

board to see if I can figure stuff out as to the orientation.

Thanks

again


--- In 7x12minilathe@..., "born4something" <ajs@>

wrote:

Hi Alan,

As Jim indicated, these things aren't critical as long as they

can

handle the volts and amps of the application and are over-rated
sufficiently to handle the sub-standard heatsinking.

Re orientation, they are usually marked with '+' and '-' on the

DC

terminals with the AC ones being marked either AC or '~'. The

two AC

terminals are interchangeable. Often the '+' terminal will have

a

chamfered corner, dot or some other marking to reduce assembly
errors. The PCB overlay usually (always, if I designed it) has
similar markings as well.

John



--- In 7x12minilathe@..., "Jim RabidWolf"
<unclerabid@> wrote:

You need something that will handle at LEAST 8 amps (so it'll

run

cool) and

at least 600 volts.

The OEM's are marked as 1000 volts 10 amps - 8amps at 1000

will do

as will

10 at 800 .... GIve me a yell if you have trouble finding one.

IF

you'll

send me a the board number, I'll tell you what the original

was.

Jim RabidWolf
Uncle Rabid ( )
We Repair Electronic Speed Controllers
For Asian Mini Lathes and Mini Mills
"Just Crazy Enough To Get the Job Done"
(Join Rabid's Lathe/Mill Controller/Mod's List!)
(Also visit BarStockEngines - join us in building without

Castings!)

----- Original Message -----
From: "Alan Reeves" <goatfarm@>
To: <7x12minilathe@...>
Sent: Tuesday, April 03, 2007 6:17 PM
Subject: [7x12minilathe] Mini-lathe controller rectifier

question

I have a Homier Mini-lathe with a shorted bridged rectifier. I
removed the rectifier to see if I could buy another and have

lost

the

darn thing. Does anyone know the part number? I had a

rectifier

on

order but when it came it, it did not look like the old one.

Also,

the rectifier is in the lower left of the circuit board when

looking

at that side, which way was the flat on the rectifier? I seem

to

remember it was up and to the left. Any help would be

appreciated.

Thanks

Alan



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lathes.
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Be sure to check out for small mills and
lathes.
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