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Member postings for john swift 1

Here is a list of all the postings john swift 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Help a beautiful lady
19/05/2019 21:01:18

According to their web site Hotter shoes have shops in Liverpool , Llandudno and Chester

you could e-mail or call them on 01695 213 213 to check if they have narrow fitting shoes

John

Thread: Electronic switch forward/reverse/stop help
17/05/2019 20:16:31

looking at your last photo

the original switch incorperates a no volt release ( I expect the black part is a 220/240V coil )

I would of thought the 3 blue cam switch elements may of been wired like this

3 pole cam switch fwd stop rev.jpg

John

Thread: E.stop wiring
09/05/2019 23:58:59

The reason I connected the switched live via the E-stop switch to A1 is

An accidental short between A1 and neutral or earth will blow the mains fuse

If you had live to terminal 13 and neutral to terminal 23

an accidental short between A1 and neutral or earth would energise the coil when the E-stop switch is open

assuming the mains supply is not protected by a residual current circuit breaker

kjd17  e-stop wiring.jpg

john

09/05/2019 11:37:32

KJD17 E-stop wiring diagram

kjd17  e-stop wiring.jpg

Thread: Fuse for "Align" slow motion mill table motor
01/05/2019 00:19:28

yes but , it all will depend on the drive having an interlock that forces you to start at a low speed

if you can start a full speed then a 1A fuse will be too low a current - you may need a 4 or 5A fuse

using a slow blow fuse will help -

for example if the original fuse was a 1A slow blow fuse would be marked T1.0A

John

 

 

 

 

Edited By john swift 1 on 01/05/2019 00:19:52

Thread: No volt realese switches.
13/04/2019 09:44:52

looking at photos of the switches

the KJD17B has the solenoid connectly to the switched output terminals 14 & 24

 

kjd17b.jpg

 

 

the CK21 has only one end of the solenoid connected to the switched output 2

the other end of the solenoid goes to a small 5th terminal you have to connect to switched output 1

this enables you to add one or more normally closed remote E-stop switches

use terminals 3 & 4 as the mains input

 

ck21 switch.jpg

if you don't need to add any E-stop switches you can use either switch

 

John

 

 

Edited By john swift 1 on 13/04/2019 09:45:52

Thread: Straightening coiled small steam pipe.
09/12/2018 22:18:28

Have a look at how coil feed Escomatic lathes straighten the stock

see page 3

https://www.escomatic.ch/media/gallery/machines/d2-d5-flexspeed-e.pdf

John

Thread: DOL starter switch
17/09/2018 20:00:57

Hi Clogs

is this what your looking for

https://www.electricalonline4u.com/2018/01/forward-reverse-motor-control-diagram-three-phase.html

forward reverse motor control diagram.jpg

John

Thread: WM18 Earth Fault - Looks like Controller blew
13/08/2018 21:24:11

as the fault was swarf shorting the semiconductors metal tab to the heatsink

it looks like the speed control is a copy of KB electronics KBLC-240D (or some thing similar )

KB electronics use devices that have isolated TAB's on the 3 diodes & 2 thyristors ( forming a controlled bridge rectifier ) & does not require the insulator

the copies use cheaper devices that don't have isolated TAB's and there for requires the insulator

john

 

 

 

Edited By john swift 1 on 13/08/2018 21:32:13

Thread: Dangerous Ultrasonic Cleaner Electrical Failure
27/07/2018 12:02:42

 

I suspect your the second person to look inside !

Some one else has had it  apart and not reassembled it correctly

 

John

Edited By john swift 1 on 27/07/2018 12:03:18

Thread: DC motors
19/07/2018 11:36:02

It may be possible

but it depends on the motors being identical and the mechanical load on the motors being the same

 

my instinct is to use a 24V supply and a separate speed control for each motor

 

what are you wanting to do with the motors ?

If its some kind of electric vehicle is it possible to have the motors driving the same drive shaft ?

 

John

 

Edited By john swift 1 on 19/07/2018 11:36:58

Thread: MEW 270, Ajax Mill
15/07/2018 18:13:51

its missing from the contents page but is on page 60

John

Thread: Clarke CL 500 switch
22/06/2018 17:10:53

the nearest I have found is this :-

http://cdn1.grizzly.com/manuals/g4015z_m.pdf

figure 17 on page 21 shows a low resolution diagram

do  two of the wires have short wires crimped on to make the diagonal connections to the switch ???

if you test the continuity between the 4 wires from the motor

I would expect you will find two wires   (V1 V2 )  have continuity and they need to be wired across the middle 2 switch terminals

 

the other  two wires (U1 U2)  motor wires will go to the start winding that's in series with a capacitor

and will connect directly to the mains supply from the NV release switch

John

 

grizzly g4015z  reversing switch.jpg

 

 

 

Edited By john swift 1 on 22/06/2018 17:37:53

Thread: Speed Controller
20/06/2018 17:47:22

looking at the video link from blowlamp

https://m.youtube.com/watch?v=X6CCxv3i4No

at 19:59 you can see what looks like the light from a red LED

I assume the speed control is controlled by the amount of reflected light from the movable flag / reflector

the mod with the graded reflector giving a better range of control

as MichaelG says looking up the device part data sheet will make things easier

may be its like this Sharp GP2S700HCP

https://cdn.sharpsde.com/fileadmin/products/Optoelectronics/Isolation%20Devices/Specs_Photointerrupter/GP2S700HCP_03Oct05_DS_D3-A02201FEN.pdf

John

Edited By john swift 1 on 20/06/2018 17:47:59

Thread: Wiring an NVR switch
16/06/2018 19:35:55

I have found a view of the mechanical latch on another D.O.L. starter

when the over load has been reset it holds a normally open switch closed

the dial (or on some units a lever ) adjusts the value of current the latch is released

when one or more of the bi-metallic stripes are heated by the motor current 

exceeds the maximum current you have set as the trip current

the adjustment of the green knob moves  a hinged  insulated bar that the  bi-metallic strips push on to release the latch

dol starter over load mechanism.jpg

 

   John

 

 

Edited By john swift 1 on 16/06/2018 19:55:12

16/06/2018 19:05:41

that's the adjuster to set the trip current for the motor you are using

15/06/2018 23:27:03

single & 3 phase wiring

dol starter wiring single phase.jpg

dol starter 3 phase wiring.jpg

john

Thread: KATSU MINI LATHE
02/06/2018 13:39:07

PS

your machine could be like this Warco wm180 -

http://andysmachines.weebly.com/variable-speed-controls.html

John

02/06/2018 11:52:37

assuming your lathe has a brushed motor

the speed control board could be either like the FC2550 board with 2 FETs controlling the motor current

fc250j.jpg

or the XMT 1135 with 2 thyristors controlling the motor current

xmt1135.jpg

once the control board has been identified it will be possible to give you more detailed help for your machine

John

Edited By john swift 1 on 02/06/2018 12:03:23

Thread: LED strip lighting
22/04/2018 23:01:34

since the LED's require a lower current

either the capacitance of the switch cable

or the snubber capacitor that bridges the triac in a solid state relay as sometimes used in LED security lights with a built in passive IR detector  , (although I believe most have gone back to using relays) can provide enough current to cause the LED's to give a dim light when switched off or more annoying flash on and off

John

PS

old switches that arc a bit before they close can cause the fuse in LED lamps to fail because

 of the use of a capacitor as a wattless dropper in the cheaper LED lamps

at 50 or 60 Hz main frequency the impedance of the capacitor  will limit the LED current to a safe value

but with the high frequency currents produced when the switch arcs

the impedance of the capacitor will be lower and more current will pass through the fuse and LED's

blowing the fuse

 

 

 

Edited By john swift 1 on 22/04/2018 23:16:24

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