My acquisition.

[Jonathan]

8 wires means the motor is most likely similar in wiring to the ones on your first machine, that is 4 windings and two per phase. You should be able to use the same method to identify the 4 pairs of wires for the 4 windings, then you just need to know which two are which phase so you can put them in parallel (or less likely series). I'm pretty sure you can safely do that by connecting to the driver and just trying the four possible combinations - one will just work and the motor will only go a couple of steps forwards and backwards with the others.

Is there definitely no part number on the motors?

[kingcreaky]

Right. about killed myself tonight lifting these bad-boys onto the trailer. Tomorrow I intend to drive over to my friends unit where there is the magic "three-phase" I can temporarily wire these in, to proove they work. Then Il put them on the bay. As ultimately im going to need single phase ones in order to use the vacume bed in my workshop

However, can anybody shed any light on what im looking for... how do I tell they work? I assume they are like big vaccuume cleaners... except I wont put my hand near the inlet as I guess it will suck it off? (my hand)
I assume the following

I guess the square blue tanks need to perhaps be filled with water? I say this as their is what looks like a sight glass on the side (labelled E) ...

if anybody could tell me what im expecting to see from each of the labelled ports... and perhaps confirmation of whether im meant to be filling the blue square units with anything id really appreciate your feedback ;)

[Swarfing]

Research some more, a vfd and you could put them to use if you ask me? Seem rather large but who knows?

[m_c]

5.5Kw and 380 delta means you'd need one hell of a single phase supply to power them, along with a meaty step-up transformer and inverter.

If it wasn't for the plastic taps, I would of said the tanks were for oil as most vacuum pumps are oil lubricated. Is there any kind of gunk/residue in the tanks?
Anyway, here's my guess-
A - taps, possibly been bodged for some reason, or might of been some kind of cooler loop connection.
B - vent - pump would pump air/oil into the tank, and it's got to get out somewhere
C - Vacuum connection point - pump sucks air in here, and I'd hazard a guess the big housing contains a filter
D - Oil scavenge feed into pump - the pump contiually pulls in oil along with air for lubrication
E - Level tube

[drumsticksplinter]

After doing a little bit of research, I think these vacuum pumps might be whats called a liquid ring type vacuum pump, where in actual fact you would fill part of the system with water, though I'm not certain where... These types of pumps seem to be common with the chinese imported machines, maybe there is some documentation from a supplier of a similar machine?

[drumsticksplinter]

This diagram might help:

[kingcreaky]

right, tired of these things being in the way, going to bang them on ebay

surely they would have originally had a starter of some description? would it be this badboy? or would this be the controller for the spindle that was on it?



What do I describe them as? 'Vacuum Pumps' , 'Vacuum Motors' if you where searching for them what would you search for?

Matt

[kingcreaky]

finally found time to get this machine working



nothing worse than hearing your own voice!