Author Topic: CIRCUIT  (Read 998 times)

Online Bluechip

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CIRCUIT
« on: December 14, 2021, 04:52:47 PM »
CIRCUIT THINGY

Offline crueby

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Re: CIRCUIT
« Reply #1 on: December 14, 2021, 04:59:05 PM »
Whats it supposed to be for??
 :headscratch:

Online Jo

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Re: CIRCUIT
« Reply #2 on: December 14, 2021, 05:05:33 PM »
Knowing Dave, It a competition to guess  :noidea:

Jo
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Online Bluechip

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Re: CIRCUIT
« Reply #3 on: December 14, 2021, 05:07:26 PM »
Whats it supposed to be for??
 :headscratch:


iT'S NOT FOUR ANYTHING ...  :headscratch:  There's only one   :ThumbsUp:   :lolb:

Regards

Dave

Online Bluechip

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Re: CIRCUIT
« Reply #4 on: December 14, 2021, 05:16:30 PM »
Knowing Dave, It a competition to guess  :noidea:

Jo

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Online Jo

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Re: CIRCUIT
« Reply #5 on: December 14, 2021, 05:17:15 PM »
May be he is being pendant-ic  ::)

Jo
Enjoyment is more important than achievement.

Offline Kim

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Re: CIRCUIT
« Reply #6 on: December 14, 2021, 06:01:50 PM »
Is it a motor control?   The monetary contact switch starts it and supplies power to the relay which then keeps the power flowing till someone pushes the momentary contact STOP button, which interrupts the circuit so the relay opens.  And the FW/REV switch will change motor direction?

But that's likely too obvious.  But it's what I come up with.

Kim

Offline tghs

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Re: CIRCUIT
« Reply #7 on: December 14, 2021, 06:31:03 PM »
what the @#&% over

Online Jo

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Re: CIRCUIT
« Reply #8 on: December 14, 2021, 06:43:12 PM »
 :facepalm: I know someone who will need to make himself one of those  :ShakeHead:

Jo
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Offline Roger B

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Re: CIRCUIT
« Reply #9 on: December 14, 2021, 07:22:29 PM »
I remember from long ago in one of the UK electronics magazines a complicated circuit to drive an LED. I was described as a battery eliminator. When the LED went out the battery was eliminated  :)  :toilet_claw:  :wine1:
Best regards

Roger

Online Jo

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Re: CIRCUIT
« Reply #10 on: December 14, 2021, 07:45:38 PM »
I think I have just realised what Dave has started  :facepalm:

Jo
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Offline crueby

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Re: CIRCUIT
« Reply #11 on: December 14, 2021, 08:24:03 PM »
Yeah Jo, looks like a circuit to drive engineers (more) batty...!

Offline mklotz

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Re: CIRCUIT
« Reply #12 on: December 14, 2021, 09:23:25 PM »

I bought and assembled one of those for a desk ornament.  It makes me smile whenever I flip the switch.

It may be utterly useless but it is a vivid example of design simplicity.  There is, of course, a motor to move the arm and batteries to power it but, beyond those and the switch on the top of the box (DPDT), there is only one SPST switch; no electronic components whatsoever.  Try drawing a circuit diagram for that. 

You can have even more fun if you build two of these boxes and then construct a simple arm that (mechanically) connects the boxtop switches.  As one box turns off it automatically flips the switch on the other which then turns itself off and turns the other on...endlessly.
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Offline Don1966

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Re: CIRCUIT
« Reply #13 on: December 14, 2021, 11:40:01 PM »
CIRCUIT THINGY
I donít think the  run jog switch will work for jog, it will stop just like pushing the stop push button. So what is the purpose of it?

Don

Offline Art K

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Re: CIRCUIT
« Reply #14 on: December 14, 2021, 11:48:41 PM »
Hey, I had one of those useless box things, it had a snake that shut the switch off.
Art
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Online Bluechip

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Re: CIRCUIT
« Reply #15 on: December 15, 2021, 07:24:40 AM »
CIRCUIT THINGY
I donít think the  run jog switch will work for jog, it will stop just like pushing the stop push button. So what is the purpose of it?

Don

Hi All,

It's a circuit copied / derived from a commercially built VFD remote pendant.  ( Except the Speed Pot. wiring ).

I decided to make one of my own for the Myford S7  and fit it to it's industrial stand after removing the original control panel.

No Don, I came to the same conclusion as yourself when I saw it. On the original it's marked as Run/Jog so that's what I put .

Never needed to 'jog' the S7 anyway.    :thinking:    Got chuck keys for that.  ;)

Dave




Offline Lew Hartswick

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Re: CIRCUIT
« Reply #16 on: December 15, 2021, 01:42:43 PM »
Functional but I would prefer the controls to be in the supply side rather than the ground side .
   ...lew...

Online Bluechip

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Re: CIRCUIT
« Reply #17 on: December 15, 2021, 02:24:00 PM »
Functional but I would prefer the controls to be in the supply side rather than the ground side .
   ...lew...

I presume (?) the VFD expects those voltage levels ....  :headscratch:

Dave

EDIT A very cursory check suggests  the control lines sink the current to opto-couplers in the VFD...  :ThumbsUp:
« Last Edit: December 15, 2021, 02:37:09 PM by Bluechip »

Offline Don1966

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Re: CIRCUIT
« Reply #18 on: December 15, 2021, 04:10:12 PM »
Quote
I presume (?) the VFD expects those voltage levels ....  :headscratch:

Dave

EDIT A very cursory check suggests  the control lines sink the current to opto-couplers in the VFD...  :ThumbsUp:


You are correct Dave. I installed a VFD years ago on my Myford lathe if you remember. It has 24VDC control and you can source or sink the controls. A jumper on mine determine which to use. And Dave I donít need jog mode either.

Don

Edit Jo: to correct HTML codes
« Last Edit: December 15, 2021, 04:48:58 PM by Jo »