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How do I wire this motor??? for my RCM

djnagle

djnagle

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I got this from a friend. It has 10.4311 foot pounds of torque and is gear driver/reduced and turns at 3.32 RPM. Perfect for a RCM. So, how do I wire this thing??? Does it require starter caps and run caps??? I am going to Grainger tomorrow to pick up a platter flang that will mount to the shaft and it has a 4" flat plate on which to mount the platter. Cool ah???
 

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looks like it says 120V between terminals 2 and 3. I'd say plug it in to the wall and let it rip!
 
Yep, it is 120v, but 5 wires is confusing the heck out of me. Can't think of any reason to have that many unless it is reversable or needs caps. Don't want to melt the thing by trail....unless I have too.
 
Any AC motor with 3 connections is probably 3 phase or 2 phase. If so, you will burn it out if you try to run it from a single phase (it will not start, & overheat).

Can you measure the resistances among the terminals? That will indicate if it is a 3-phase delta wired, or two phase winding. Either way, it will need a phase shift capacitor.
 
Looks like 1 and 3 to me, but what is the rest of the writing under the stakon on number two (ser no??)?


What is 2 phase electricity?:scratch2:
 
jaymanaa said:
What is 2 phase electricity?:scratch2:
Click to expand...

Two phase is what you get if you connect one winding directly across the single phase AC mains, and connect the starter winding (physically spaced 90º apart from the main winding) through a phase shift capacitor, of such a value that the current is phase shifted about 90º as well.

Three phase motors have windings spaced 120º mechanically, and if run off a single phase supply also need a phase shift capacitor. They are then also run as two-phase machines (with less efficiency than if they had a true 3 phase supply), but the physical winding arrangement demands a different phase shift capacitor to more closely match the electrical phase shift with the mechanical phase shift.

IF it was originally configured a a capacotor-start/capacitor-run motor, that would account for five wires. But that configuration is very unusual in such a small motor.
02489.png
 
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steerpike2 said:
Two phase is what you get if you connect one winding directly across the single phase AC mains, and connect the starter winding (physically spaced 90º apart from the main winding) through a phase shift capacitor, of such a value that the current is phase shifted about 90º as well.

Three phase motors have windings spaced 120º mechanically, and if run off a single phase supply also need a phase shift capacitor. They are then also run as two-phase machines (with less efficiency than if they had a true 3 phase supply), but the physical winding arrangement demands a different phase shift capacitor to more closely match the electrical phase shift with the mechanical phase shift.

IF it was originally configured a a capacotor-start/capacitor-run motor, that would account for five wires. But that configuration is very unusual in such a small motor.
02489.png
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Ah, I see. I think we just use different lingo.:yes::thmbsp:
 
It is likely a permanent split capacitor motor, like those used in household (and HVAC, except it is 120volts) fans. Two of those terminals go to the line connection, the other goes to a capacitor. The other capacitor lead shares the "hot" terminal of the line connection. You will need to determine the value of said cap.
 

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I did find a site that had a table listing the cap and resistor size for a motor close to this. When I plugged it in with just the black and white lead it just studdered.
 
mibag6 said:
You will need the RC network for the motor to run properly. The extra wires don't belong in the motor and probably came from another switch. It still functions the same but takes up room in fairly tight quarters.
Look here: http://mcsupplyco.com/uploads/images/drawings/pdf1/SYNCGUIDE.pdf
page 5 for an explanation of the reason for the phase shift and see figure 6 for a basic wiring diagram.
Click to expand...
Very descriptive link. Thanks for posting that.
 
OK, todays to-do list includes calling MC Supply Co. to see what value cap and resistor I need for this model. I could not find this model, or anything close, on there site but I'm sure they'll know. Then off to Grainger for a switch, rubber mountings, and the flange. Then this project will sit for another three months untouched. Oh Well.
 
3 RPM?

It takes almost 20 seconds or so for the motor to make one revolution?

Too slow for me...
 
One revolution and the record is clean.

I talked to Slo-Syn today and they sent me the cap and resistor specs for that motor. Heading out the door now to pick up parts.
 
When using the vacuum on my VPI, the vacuum motor runs for one revolution, then I shut off the vacuum. The 'wind-down' of the vacuum lasts for a second rev, and the LP is dry. At least, dry enough to set the LP aside, and move to the next.
 
luvvinvinyl said:
When using the vacuum on my VPI, the vacuum motor runs for one revolution, then I shut off the vacuum. The 'wind-down' of the vacuum lasts for a second rev, and the LP is dry. At least, dry enough to set the LP aside, and move to the next.
Click to expand...

Yeah, but that one rev of our VPI's, combined with the cleaning and rinsing steps takes less that the one trip by the slow motor he proposes to use....and, 20 seconds of vacuuming is way, way too much....mucho statico....
 
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