Now we’re survive laid upward to solder novel motor leads on. Again, delight ensure that your motor is oriented just every bit inwards the photograph below, to ensure my explanations of “top/bottom” are correct:
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| Motor oriented amongst plain centre at left, bobbin winding assembly at top right. |
In Part xiii nosotros cutting the onetime motor leads, leaving the top 1 an inch long, the bottom an inch-and-a-half long, every bit shown here:
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| The top Pb is 1" long here. |
This is the maximum length nosotros tin larn out them as well as withal stand upward for everything inside; we’ve cutting them to this length to give y'all first-timers an chance to braid the novel wire on without the leads existence impossibly short.
However, the ideal length is actually nigh 3/4" or less for the top motor lead, as well as 1.25” for the bottom motor lead. Here’s a photograph of a unlike motor to which I’ve cutting the top Pb quite short:
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| The top Pb is 3/4" long here. Harder to do, but better. |
Braiding a novel wire to a connector that curt tin live challenging, especially when y'all cannot quite larn your fingers merely about the shorter Pb coming out of the winding. It requires a fair sum of practice. If y'all experience you’re upward to it, become ahead as well as cutting the leads to this ideal length, but live aware there’s no going back.
In whatever case, larn those leads every bit unopen to the ideal every bit you’re comfortable with, as well as therefore let’s larn started.
Cut 2 8-inch pieces of novel eighteen AWG wiring. (Use unlike colors, obviously. I prefer cerise as well as dark because those stand upward for amongst the colors on the terminal trunk where they volition attach.) Strip the ends to a 1/2-inch or 3/4-inch, depending on what y'all became comfortable braiding during your soldering practice.
Don’t forget to individually braid the ends.
Then, braid the BLACK wire to the BOTTOM motor lead, as well as the cerise wire to the top lead.
Set upward your Helping Hands, placing at to the lowest degree 1 of the alligator clips betwixt your articulation as well as the winding. This is therefore the clip volition human action every bit a “heat sink,” absorbing the oestrus from the soldering Fe instead of letting it period of time into the winding. Be mindful that the clip may larn quite hot, therefore don’t forget to allow it cool before y'all send upon it.
Then, solder away, every bit nosotros practiced inwards Part 3.
Next, cutting some of the 1/8” oestrus shrink tubing to whatever length volition encompass all of the exposed wiring, going right upward to the winding. Be certain to cutting the oestrus shrink tubing therefore that merely 1/8” of it volition overlap amongst the existing insulation on the novel motor leads. (Don’t larn inwards overlap whatever farther than that, or it volition give us problem later.) Then slide the oestrus shrink tubing onto each motor Pb from the tail end.
You may retrieve that I left some of the onetime insulation on close the base of operations of the bottom motor lead. Here y'all tin run into that, inwards add-on to roofing the novel articulation amongst the 1/8” stuff, I’ve covered the thicker leftover insulation amongst the 3/16” oestrus shrink tubing, every bit the 1/8” would non stand upward for over that section.
In the photograph above, y'all also run into that I’ve stacked the motor fifty-fifty higher upward amongst to a greater extent than blocks, therefore I could comfortably stand upward for a lighter beneath it. It may await precarious, but residual assured I’ve checked it for stability, therefore the whole affair doesn’t come upward tumbling downward every bit I’m working on it.
Once I’ve finished the heat-shrinking, I accept the motor off of the blocks for the side past times side step.
Now nosotros necktie the underwriter’s knot that nosotros practiced earlier.
Since nosotros practiced “moving” the knot downward the wiring before, y'all should receive got no job getting the knot just where y'all desire it. And where y'all desire it is right upward to the heat-shrink tubing.
Heat-shrink tubing is potent as well as doesn’t curvature well, past times the way, which is why nosotros made certain it didn’t overlap also much amongst the insulation on the novel wiring. If nosotros made that mistake, that would motility our knot farther out than nosotros desire it, which mightiness foreclose us from closing the motor.
Get the knot every bit tight every bit y'all tin larn it, but live careful that y'all don’t house a lot of stress on the motor leads where they become into the winding. That is the most vulnerable purpose of this operation.
Next, accept some of the larger, 3/16” oestrus shrink tubing as well as cutting a slice just iii inches long.
Use it to encompass both leads...
...sliding it all the agency downward to the knot.
Then heat-shrink it amongst your lighter.
Now it's heat-shrunk. Don't worry if the tails of the wiring are going all over the place, we'll kind that out later.
Finally, road the wires from the within of the motor out through the grommet. With my left manus I give-up the ghost along my fingers on the base of operations of the motor leads, to foreclose stressing their connector to the windings, land I work my right manus to thread the wires out through the grommet hole. (My right manus is absent inwards the photograph because it's belongings the camera.)
Now we're inwards expert shape. But don't connect the plain centre to the motor housing merely yet, there's a fox to it we've got to cover.
Go on to Part 16: Re-attaching the Field Core
