Troubleshooting

Status
Not open for further replies.
hbiss said:
Crummy drawing, is this a foreign made machine? Wire #4 has to be connected to the aux contact on C for everything below it to be powered. The segment between the two either never got drawn or didn't print.

-Hal
Click to expand...
Looked a little harder at it and I'd say yes it probably does somehow connect to supply everything below it on the drawing.

Unless it is one of those new "smart drawings" and it is showing the "open circuit" that is keeping things from working. Fix that problem and the drawing self heals?:cool:
 
That #4 is coming off a latching contact so it stays powered after the start button is pressed since the start button is only a momentary contact. The drawing doesn't show it continuing but it has to for it to work without holding in the start button.
 
I was waiting for somebody to mention latching, actually I looked for it. I see nothing that would provide electrical latching. Switch on the upper left is a simple on/off toggle switch that through the EMO and a couple of other switches all in series powers the coil of contactor C. Contactor C controls all three phases to the motors and an auxiliary contact powers the rest of the control circuitry.

-Hal
 
hbiss said:
I was waiting for somebody to mention latching, actually I looked for it. I see nothing that would provide electrical latching. Switch on the upper left is a simple on/off toggle switch that through the EMO and a couple of other switches all in series powers the coil of contactor C. Contactor C controls all three phases to the motors and an auxiliary contact powers the rest of the control circuitry.

-Hal
Click to expand...

I don't think the drawing is correct. It looks like the line for the #4 wire should continue back up to the 2nd line after the NO contact in the drawing. If there is an aux contact on a relay that is NO, that could latch it in.
 
Do you mean the junction of the fuse and the NO "ON" switch? Yes it would latch but with everything else as is how do you turn it off? Also, what about the mystery wire then?

I'm not disagreeing that the drawing could be wrong.

How about it Nick, what kind of switch is the "ON"? A toggle or a momentary contact button?

-Hal
 
It's momentary contact, in normal operation when you press the start button it allows you to control all the functions via the joystick. Right now I have it working just via the joystick the start stop does not work , I have 1&4 jumped out

Sent from my SM-G950U using Tapatalk
 
I agree with all that the drawing is incomplete and poorly drawn with respect to the choice of device symbols.
Take a ruler and place it vertical on the page and draw a line from #4 wire up to the left side of start relay coil C. Then draw a line from #4 wire down to the horizontal line that connects to the rest of the circuit below. The C contact becomes the latching contact of the start relay coil C. The stop contact is the NC contact of the pushbutton to the left of #3 wire.
This should complete the drawing for the circuit to function as described.
 
The logic of how that is drawn doesn't seem to be intentional design of needing a holding contact. The switch on the first line seems to be an on/off switch though drawn as a limit switch. The stop button is drawn as though it is a mushroom head "E-stop" and one of the better things drawn on there - I think. Hard to judge it too much until you have seen the equipment it is supposed to represent though, all those switches may actually be limit switches, if so they at least need better identification to their purpose. Some of those limit switches are named some are not. The ones that are are just LS1, LS2 ... but nothing on legend to tell us where/what those are.
 
ATSman said:
I agree with all that the drawing is incomplete and poorly drawn with respect to the choice of device symbols.
Take a ruler and place it vertical on the page and draw a line from #4 wire up to the left side of start relay coil C. Then draw a line from #4 wire down to the horizontal line that connects to the rest of the circuit below. The C contact becomes the latching contact of the start relay coil C. The stop contact is the NC contact of the pushbutton to the left of #3 wire.
This should complete the drawing for the circuit to function as described.
Click to expand...

That's what I was trying to get at.
 
Exactly the diagram did nothing for me as well, I'm going to try and get back there this week and take more pics

Sent from my SM-G950U using Tapatalk
 
kwired said:
The confusion here is I see no switch that is "on-off" nor do I see an oil pump or a contactor labeled oil pump.
Click to expand...

The last line on the bottom. C5 operated by P32 which is yet another symbol for a switch.

I'm in agreement with all that this isn't wired according to the poorly drawn diagram. Sounds like you are going to have to trace the wiring around the coil of C and the on pushbutton to see how it was done.

-Hal
 
This is a drill press in a pretty big iron shop. There's a start/ stop switch and an on/off toggle on front of the machine then there's. 4 position joy stick. The joy stick does as follows drill forward , drill reverse
And arm up and arm down Wich moves the bit up or down, the switch on the front is for the oil pump. Wats supposed to happen is when u pres the start switch it allows you to control the machine via the joystick.

Sent from my SM-G950U using Tapatalk
 
the momentary push button energizes the self-sealing/latching master control relay
this relay enables ckts 1-4 to be controlled by the joystick
the c5 is a momentary lube pump

there are a couple wires missing on the dwg
the latching contact wire 4 needs connected to coil c input and to the open line directly below it
this provides the control power to c1-c5

c1 and c2 interlocked so only one at a time can be enegized
same for c3 and c4
 
Last edited:
there are a couple wires missing on the dwg
The latching contact wire 4 needs connected to coil c input and to the open line directly below it
this provides the control power to c1-c5
Click to expand...

That would make sense. So the switch or button after the fuse on the top left is the "OFF" which should be normally closed even though it's marked normally open. The button above the C contacts is the "ON" which should be normally open but isn't marked. Both are momentary.

Or is the switch or button after the fuse on the top left something else and you use the EMO or that switch after it to turn it off???

And that's PB2 (push button 2) not P32 for the oil pump.

:sick:

-Hal
 
Status
Not open for further replies.
Top