NZ-1 Coil Winder
© Brooke Clarke 2015Description
Photos
Optional Motor
Coil Formers
Related
Links
Background
As part of my general interest in Inductors and Helmholtz Coils in particular I got this so I could wind coils with more turns than I'm willing to wind by hand.
From eBay seller cleveland_store aka Joyfay.com - coil winders
Description
This device consists of a hand cranked winding shaft driven by a 1:8 step up gear ratio and a Veeder Root turn counter. For each turn of the crank the winding shaft makes 8 turns and the counter increases by 8. Note there is a small hand wheel on the right end of the winding shaft allowing for 1:1 slow speed precision winding. The 1:1 hand wheel also has a groove for a rubber O-ring type belt maybe 4mm diameter for adding motor drive. Probably like the motor + foot pedal units made for sewing machines.
Note there is no wire handling included like on the more expensive coil winders.
The included cones will work for form diameters between 18 and 25mm, but I want to wind much larder coils so new holders will be needed and possibility a stand to elevate the winder shaft. For coils longer than about 100 mm a winding shaft extension may be needed. The threads may be 10 x 1.5mm (one eBay ad says 8mm threads) on the winding shaft so a coupling and some 10 x 1.5 threaded rod would make an extension. The shaft is about 9.5mm (3/8") in diameter so that's the hole size needed to wind the plywood disks for the Helmholtz coil. A tail stock may or may not be needed to go with an extension. The winding shaft is about 6-1/2" above the mounting surface suggesting that a coil up to 12" in diameter could be wound, but the information in the advertizing says 150 mm ( 6" diameter) which may be a typo for 150mm radius? This can be increased simply by mounting the winder on a block.
There are 5mm diameter holes in the bast to mount on a work surface.
Model Variations
NZ-1 Manual winder with Veeder Root counter, no wire handling ($60)
NZ-2 Manual winder with clock fact turns counter & wire handling ($200)
NZ-5 Manual winder with clock face turns counter, no wire handling ($35)
FZ-160 Manual winder with digital turns counter & wire handling ($230)
TL-A601 Motorized winder with microcontroller for wire handling ($1100)
Photos
Fig 1 Poor packaging outside of box
Fig 2 Poor packaging inside of box
Fig 3 Front
Fig 4 Front
Fig 5 Crank end
Fig 6 Back
Oil holes feeding all shafts.
Fig 7 Shaft end
Optional Motor
This is a Treadle Sewing Machine Add-On motor Kit that contains not only the 110 VAC, 7000 max PRM. 1.0 Amp, 100 Watt motor, but also the variable foot control, a short belt and spare brushes.
Box
Belts
Leather Treadle sewing machine
Modern fiber reinforced sewing machine
Hoover Upright Vacuum p/n 562289001
(not for this motor, but for Flywheel-Pully
Although there was no mention of how to add a motor associated with the description of this manual coil winder, when I saw the pulley size on the 1:1 shaft know it was clear that it would accept the belt used on a treadle sewing machine or on the add-on motor used with them, so I got a new one on eBay from seller grace2015sindi with title:
"1.0 AMPS WHITE HOME SEWING MACHINE MOTOR & PEDAL SINGER HA1 15 66 99" Note that there are a number of different versions of the add-on motor both in color and for the machine they fit.
Belts
The local vacuum cleaner - sewing machine store had both the modern toothed type of belt but also the long leather belt used for treadle sewing machines. Although the longest modern reinforced plastic toothed belt is already a loop and the treadle leather belt is just a length of round leather that needs to be joined with what looks like a stout staple, I like the leather belt better because instead of the half foot or so distance between the motor and the coil winder, the leather belt allows setting the distance between them anywhere I want up to a few feet apart. The leather belt also is 1/3 the price of the modern belt. The modern belt would be handy for connecting two small DC PM motors together using a flywheel-Pully. This motor would also be handy for driving a DC PM motor as a generator.
Coil Formers
The coil needs to be wound on a former. That might be a commercial bobbin, a length of plastic pipe or plastic pipe fitting.
PVC pipe can be used as a former.
Fig 8 PVC couplings: 1-1/4", 1-1/2", 2", 3" & 4"
Note the nominal size is the ID of the pipe, so the ID of a coupling needs to
be larger than the nominal pipe size plus two wall thicknesses.
Nominal Size
OD ID Len 1-1/4"
1.967
1.662
2.620
1-1/2"
2.220
1.900
2.744
2"
2.715
2.380
2.852
3"
4.032
3.504
4.211
4"
5.023
4.540
4.268
Schedule 40 and 80 PVC pipe dimensions (inches)
Nominal
Size
ID
OD
Wall
1/2
0.602
0.840
0.109
3/4
0.804
1.050
0.113
1
1.029
1.315
0.133
1-1/4" 1.360
1.660
0.140
1-1/2" 1.590
1.900
0.145
2" 2.047
2.375
0.154
3" 3.042
3.500
0.203
4" 3.998
4.500
0.237
5"
5.016
5.563
0.258
6"
6.031
6.625
0.280
There are also commercial coil bobbins (Google) that can be used, but these are typically intended for use with specific magnetic cores.
Related
Inductors
Helmholtz Coils
Fasteners
Impedance
Links
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Page created 21 May 2015