Wiring Diagram check

[cropwell]

So you're saying I should just have all switches as limits instead of separating homes / limits ?

Good to know :) I'm not sure what the difference is between PST relays and DP relays.

I just got inspired from your diagram, that's why I used relays on mine :) Or maybe DT relay it the other word for contactor ?


How about the limit/home switches ?

Normally a BoB has 5 inputs, which map to pins 10 to 13 and 15 on the port. They seem to be ususally used as Homes, Limits, E-stop and touch probe, leaving one spare. If you absolutely need more, you can always use a second BoB, which I do. That second board is very simple, just opto isolated inputs and outputs. It's overkill though

1. You have to keep Homes and Limits as separate inputs. Mach3 treats them differently, Limits are more like pressing E-stop in function. Homing is a different process, Mach moves the axis towards the Home position until the switch trips, it then jogs back until the switch reverts to normal. It does this for Z, Y and X in that order. Z first so your cutting tool is clear and high before the gantry moves.

2. ST on a relay or switch refers to 'Single Throw' which means your contacts either make or break.
DT means you have a common (COM) contact which makes with a normally open (NO) contact when the relay is energised and when not it falls back to the normally
closed (NC) contact.
This change over can be Make-before-Break but is normally (on a relay) Make-after-Break.
6P means 6 poles which is 6 sets of contacts inside the switch or relay. SP is usual for single pole, DP for double pole, after that numbers are used.

3. Contactors are special construction relays, suited to switching higher voltages without arcing, normally used for 3phase and suited to long 'on' periods.

C'mon G.E., I didn't guess.

Happy Holiday

Rob

[JAZZCNC]

1. You have to keep Homes and Limits as separate inputs. Mach3 treats them differently, Limits are more like pressing E-stop in function. Homing is a different process, Mach moves the axis towards the Home position until the switch trips, it then jogs back until the switch reverts to normal.

Not strictly true Rob and I know you now this but for clarity sake for others I'm pointing this out.

Homes and Limits can share the same Input/switch provided they are wired directly to the inputs and not thru Relays also Mach is setup correctly.

When setup this way Mach changes how it homes.? It turns off limits while Homing and treats the switch has HOME switch. After Homing finish's it turns Limits back on and treats the Switch has Limits from that point on or until Homed again.
If you wire the Home switches to separate input then Mach will still monitor the Limits while Homing and trip if touched.
Also If you wire each home switch to individual input then you can have Mach simultanously home all Axis at the same time. (This does mean a slight change of Mach's Home script)

[eurikain]

Normally a BoB has 5 inputs

Mine does have five inputs (User Manual of 5Axis Breakout Board - Mach3).

1. You have to keep Homes and Limits as separate inputs. Mach3 treats them differently, Limits are more like pressing E-stop in function. Homing is a different process, Mach moves the axis towards the Home position until the switch trips, it then jogs back until the switch reverts to normal. It does this for Z, Y and X in that order. Z first so your cutting tool is clear and high before the gantry moves.

So I wire homes in series just like the limits, with an SPST relay ?

2. [...]

Great explanation :) I had guessed the S stood for "Simple", but "Double" didn't hit my mind ^^, as well as the other details. You are a good teacher :)

C'mon G.E., I didn't guess.

How stupid can I be looooool, duhhhhhh ! That's the "Rob" that put me on track x) You still have to send me an email ;) (and I still have to reply the one from Sunday :p). I thought you had fallen off some unsafe stairs, I'm glad to know you're alive ;) !

[JAZZCNC]

So I wire homes in series just like the limits, with an SPST relay ?

Your not paying attention enough "G" Read what's been wrote again and you'll see the answer to that question.!!

[cropwell]

G E

I had guessed the S stood for "Simple",

Guess again - it stands for SINGLE

I know what Bob you have, didn't I send you the manual in the first place ? I have two of those BoBs sitting in a drawer and two of the simple types, I made, with them. I plan to use 1 of each of them as replacements, but from then on any new controller will be ethernet.



I replied to your email on Sunday, I have forwarded a copy in case you didn't get it.


Jazz, I am actually trying to keep things as simple as possible and get OP shifting his gantry ASAP. I am just wondering if his original problem may have been the phase wiring on the stepper coils.

Jazz don't think I am having a pop at Yorkshiremen, I am not, every one of them I have met, were honest, down to earth, friendly and good humoured. In fact they both were. You can always tell a Yorkshireman, buuuuuut I am sure you know the rest.

Cheers

Rob

[eurikain]

G E
I had guessed the S stood for "Simple",
Guess again - it stands for SINGLE

Whoops ! Got me :)

I know what Bob you have, didn't I send you the manual in the first place ? I have two of those BoBs sitting in a drawer and two of the simple types, I made, with them.

Yes you did send me the manual :) See, the thing is that it's only today I realised that you were cropwell. I am getting more used to Rob :) Actually, where does that cropwell come from :D ? As in "crop well" ?

[JAZZCNC]

Jazz don't think I am having a pop at Yorkshiremen, I am not, every one of them I have met, were honest, down to earth, friendly and good humoured. In fact they both were. You can always tell a Yorkshireman, buuuuuut I am sure you know the rest.

Total Bull shit.!!! . . . . . Well know you've met 3 honest Yorkshire men.!! . . . . But I'm not really botherd Rob so carry on mate it's "watta of ducks arse" to me.. .

[eurikain]

Alright, so I've updated the wiring diagram with the following changes:
- simplified connections to the 6PST relay
- 6PST relay to be replaced with a contractor driven by a relay. Just didn't want to break all the connections and rewire everything
- 24V and 5V PSUs
- 12V fans wired in series to the 24V PSU
- limit switches moved input pin
- home switches wired in series, with override switch and 5V idiot-proof buzzzzzzzzzer
- two input pins left, most likely one of which for a touch probe to come in the next few months


I've also updated my original post with the answers to my questions and the new diagrams, so that anyone coming in the thread can follow along without reading through all messages.

[eurikain]

Your not paying attention enough "G" Read what's been wrote again and you'll see the answer to that question.!!

Sorry, I wrote my reply before seeing what JAZZ wrote :) Plus, it's not that I'm not paying attention, I just want to make sure to understand properly. You're going to end up thinking I'm a bit mentally slow loooooooool.
So the answer is that there are two options:

1. homes on separate inputs
   +: possible to home all axes at the same time (while modifying the home script).
   -: you loose one input
2. homes on one input
   +: you save two inputs

No matter what, it's not necessary to use a relay for the homes.

See ? I'm a goooooooood student :) !

[Cnc many]

Hmm with all that built. In safety im surprised your using a single pole main switch on the ac input