Thread: Dust extractor emergency stop switch removal

Jane, by any chance are you colour blind?
The reason I ask, is that the colours are Red, White, Blue and Black, my thoughts would be to extend the Red, Blue and Black, which would be the standard wiring code. I can't see how the white wire connects to anything, or where??
Is the switch a contact switch, which requires the power to hold it in, or is it like a light switch?
When I made my dusty (Carbatec 2 HP) a remote start,with a contact switch, I cheated and ran a cable fitted with a socket to where I wanted the DC, then back to a box fitted with the contact switch, then a short cord fitted with a plug. Where the switch was, I installed a couple of inline car fuses, then covered the opening with a piece of plastic, I think I used a piece of Ice cream container for this. The existing cord then plugged into the socket
NOTE: I understand that no liability is accepted by UBeaut or the Wood Working Forum's administrators or moderators for my method of connection.
I contacted a sparky to confirm that this was a SAFE method, to which he agreed.

Jane, even with the photo there's not enough info to reliably answer your question. We'd need to also see where the wires come from and where they go to. I reckon it's best left to your spare to handle it.

Not sure why there are 4 wires from the, what appears to be a standard, on/off button. This is a single phase DC right?
Have your sparky disconnect the motor leads and put a meter on them while operating the switch. One may do nothing. If the DC is offered in single and three phase options it may come with the same cable but is connected differently.

Hopefully these photos make it clearer. (Sorry about the incorrect rotation)
switch.jpg

The pink, grey, green and black wires (in earlier post's photo and now enclosed in box) go into the cable that goes to the safety switch. There is then the power cord to the powerpoint.
now.jpg

The plan is to replace this cable and safety switch with a new power cord that goes to a powerpoint in the dust enclosure. This powerpoint will remain ON. I have power running from this powerpoint in the enclosure to a powerpoint inside the workshop. This latter powerpoint is the one I will use to turn the dusty ON/OFF.
after.jpg

I'm not sure if it applies but in some instances 220V plugs here have 4 prongs. Two 110v, one neutral, and one ground. Could it be that this unit is sold on both our continents and yours has a jumper for the 3 wires and ours would use the 4?

Pete

My "guess" is that the motor can be run at 2 speeds depending on which wire you join into the switch. (Just a guess)

It seems that there are more than 4 wires connected from left on the photo in the first post - I think that I can see 6 - there are extra black and white wires below the top 4. If you are not planning to use safety switch, probably drill out rivets and have a look what is going on inside, this would help your sparky to figure out what is going on.

I'm not convinced that disabling an emergency stop switch or locating said switch inside an enclosure is a good idea.

If it were me, I'd be asking the sparky to relocate all the switches outside the enclosure.

Hey Jane, I found that wiring a bit hard to fathom too, so I found another way...
Place a carefully crafted block of wood on top of the ON switch.
IMG_1190.jpg

Close the switch cover to hold the switch permanently on.
IMG_1191.jpg

Plug in to a power outlet switched from above the lathe.
IMG_1192.jpg

Has worked fine for about 12 years.

Ha! I did suggest something along those lines - he wasn't too happy with that approach. Certainly the easiest and simplest (and cheapest).

If you decide to do that, remember to fit an NVR switch inside the shed to operate the DC.

I don't understand why. If I leave the NVR switch on the dusty in the above mentioned 'locked on' position I still have an on/off switch in the workshop that supplies power to the powerpoint in the enclosure.

Originally Posted by Picko

Hey Jane, I found that wiring a bit hard to fathom too, so I found another way...
Place a carefully crafted block of wood on top of the ON switch.

What a great idea. My dusty is in a cupboard vented to the outside. A "carefully crafted" bit of wood and now I can now use a remote control power point to turn it on and off from any part of the shed.

Cheers

I agree with Ian, locking NVR switches is extremely dangerous and I don't recommend doing this.
I also don't recommend having too many switches in series in any system as it just gets confusing.

If the impeller jams because it sucked up something the motor will rapidly overheat and eventually trip out.
Some motors have automatic thermal cut outs that come back on when they cool down - better ones have a button that you have to manually push to re-activate.

In the flurry of the moment you might forget to turn off the power and with no working NVR switch , if you then stick your hand down inside the impeller to remove the blockage and the thermal cut out kicks on the impeller will take your hand off!

That's why we have these things.