Motor Connections Help Please (Italian!)

[Nigel Graham 2Participant @nigelgraham2]

I examined the connections on the motor I think Italian-made, I am to use for a small horizontal milling machine. Can someone please help me make sense of them, lest I need reverse the rotation?

(I am assuming little or no need for reversing, and constant clockwise arbor rotating, looking out from the machine to be correct for drilling and for down-cutting when traversing the table from right-to-left.)

The diagram is of the metalwork itself, the open rectangles being the moveable links. A similar diagram, with the Rotaz etc legends, is embossed inside the terminal-box cover.

The other details: 1-phase, 240V, 1HP, 1350rpm.

The motor is presently in Rotaz 8X mode.

Using Google Translate:

Rotaz seems the abbreviation for the Italian for "Rotation" (Rotazione), but what do DX and 8X mean?

I thought they might be the direction abbreviations, and that does make sense, sort of, for DX (destra / destro = left).. Not for 8X though.

Clockwise is senso orario; anticlockwise, senso antiorario .

Left and Right also translate nearly to their original Latin: sinistra and destra (the last vowel is gender-set). So I've not misread a 'B' as an '8'.

Looking at Spanish instead, as a test, gives very different words entirely.

.

Sketch made in TurboCAD.

.

[Recalls that scene in Monty Python's The Life of Brian – the Roman soldiers marching to sinister dexter, sinister dexter…]

[Nigel Graham 2Participant @nigelgraham2]

[Michael GilliganParticipant @michaelgilligan61133]

I think your Python comment might be closer than you expected: **LINK**

https://mymemory.translated.net/en/Italian/English/rotaz-dx

… and the 8 may actually be an S

MichaelG.

.

But it looks like you knew that anyway  

Edited By Michael Gilligan on 16/01/2023 21:51:27

[noel shelleyParticipant @noelshelley55608]

Michael has beaten me ! A typo and the 8 should be an S. Noel.

[David Davies 8Participant @daviddavies8]

Sono solo due fili e un secchio di terra sai!

Doubt if this helps a great deal.

Dave

[Nigel Graham 2Participant @nigelgraham2]

It won't, Dave, not without you write the music with it too… I look forwards to hearing your completed opera.

Oh, and Google says there should be an accent – the grave in French at least, over the 'e'.

Michael, Noel –

I did indeed already know sinister and dexter's meanings as Latin words! Though I don't speak Italian or Latin. I may be wrong but Italian looks one of the easier modern languages to learn, partly due to its origins that also gave so much to English. Given a Latin phrase, I can occasionally see its gist by English etymology.

Right, motor labels.

You've all sent me down the garden to retrieve the cover from the workshop….

It's cold out there.

The lid is a black, hard plastic moulding with letters only a few mm high so not ever so easy to read, but I can now examine it with a magnifying-glass under the room light.

Yes, it is an 'S', but so tightly closed it looks very much like an '8'. It took quite a strong lens and tilting the thing about under the lamp to read it properly.

So problem solved. It is in sinistral mode at the moment!

Picturing mentally the general arrangement of the rather formidable amount of machinery I need build to serve a milling-machine designed for line-shaft drive, I think that is even already in the required direction. When I bought it, the milling-machine (Denbigh H4) was graced with a very large,ancient motor that belt-drove a venerable Ford 3-speed car gearbox, then chain final drive, all on an ungainly angle-iron frame above the mill itself.

Thank you very much for your help!

[Howard LewisParticipant @howardlewis46836]

If you wish to have the motor reversible, you will need to find a reversing switch where the contacts can be made to replicate the links shown, in the "Forward" and "Reverse" positions., with an "Off" position in between.

Howard

[Dave HalfordParticipant @davehalford22513]

If there is a nut to tighten the horizontal arbor cutter you may find reverse just a little irritating

[Nigel Graham 2Participant @nigelgraham2]

Howard, I think I do have a reversing-switch spare though was not anticipating using it – mainly for the reason Dave suggests!

It's also the wrong way for drilling. The arbor is of 3MT taper so will take drill chucks and other lathe tooling I have, allowing for the drastic reduction in cross-travel accommodation and travel they give.

[peak4Participant @peak4]

Posted by Nigel Graham 2 on 17/01/2023 16:27:31:

Howard, I think I do have a reversing-switch spare though was not anticipating using it – mainly for the reason Dave suggests!

It's also the wrong way for drilling. The arbor is of 3MT taper so will take drill chucks and other lathe tooling I have, allowing for the drastic reduction in cross-travel accommodation and travel they give.

A simple toggle, or rotary, switch should be enough to reverse the motor; double pole, double throw, centre off.

Bill

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