Motor Starters

[DMBParticipant @dmb]

Seeing the VFD thread by Steviegtr, I'm reminded of the time when I wanted help wiring a simple starter for my 1PH mill motor. This was small green and red push buttons and a big red mushroom head emergency off button. Yellow top of box, black lower half.

Two options, an expensive one in UK or identical el cheapo model on internet from the east. I went for the latter, with of course, no instructions and I couldn't figure out how to wire it, so appealed for help on here. Several answers including look at instructions supplied with UK version.

I tried both, they were different circuits for apparently the same switch. The UK version wiring diagram didn't work, meaning the Chinese makers had built the innards differently for some reason. The other circuit supplied by another reply works perfectly.

I dont feel it necessary to have VFD on the mill but I have it on the myford. 'Plug n play' type from Newton -Tesla. Highly recommended, trouble free, excellent.

Edited By DMB on 25/03/2020 09:04:53

[DMBParticipant @dmb]

[SillyOldDufferModerator @sillyoldduffer]

Posted by DMB on 25/03/2020 09:02:11:

…

Two options, an expensive one in UK or identical el cheapo model on internet from the east. I went for the latter, with of course, no instructions and I couldn't figure out how to wire it, so appealed for help on here. Several answers including look at instructions supplied with UK version.

I tried both, they were different circuits for apparently the same switch. The UK version wiring diagram didn't work, meaning the Chinese makers had built the innards differently for some reason. The other circuit supplied by another reply works perfectly.

I dont feel it necessary to have VFD on the mill but I have it on the myford. 'Plug n play' type from Newton -Tesla. Highly recommended, trouble free, excellent.

…

Unlikely that the Chinese 'built the innards differently for some reason'. More likely DMB innocently bought the wrong switch and lacked the skills and equipment needed to work out how to wire it up. No shame in that – there are thousands of different switches on the market, often with different configurations in the same package. Unsafe to select switches by comparing pictures!

Technical jobs are much easier when the appropriate skills and tools are to hand. Decoding an unknown switch is almost trivial for anyone experienced in electronics and equipped with a multimeter. Much harder to do from first principles, maybe including the need to confirm that a switch matches the circuit, or to adapt the circuit to suit the switch.

When doing things I don't understand,and don't want to understand, it's jolly good idea to buy in a package with good instructions, or to pay a specialist to do it. I bet my hero Cherry Hill would struggle with an Electronic Lead Screw project without a full set of clear instructions, and LBSC would be completely lost!

Dave

[Bob StevensonParticipant @bobstevenson13909]

….Cherry Hill seems to have been doing alright without an electronic lead screw project.

[john fletcher 1Participant @johnfletcher1]

If you send a picture, I might be able to help. John

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