Limit switch's - best configuration?

[John S]

The short answer is no........

.

[HiltonSteve]

The short answer is no........

.

Make your bloody mind up......

[John S]

It's a good news, bad news answer.
First off you only need 3 inputs if you want to keep them separate which is a good idea.
If you are using Roy's Uniport board stuff the e-stop into pin 10 input 1.
don't link them as Roy shows in his manual.

Linking will work but they will only work as limits.

Bad news is Mach sees both switches on one axis as just a limit, it can't differentiate between the two.
this is a problem with Mach that I have been trying to get altered for ages but Brian just don't seem interested. The new mach4 is supposed to be able to see both switches so it may filter down into Mach3 ?

If you hit a limit switch it knows but not which one so it's possible to jog further onto the switch. Knowing which one would allow you to only jog off and not further on.

Good news is it can use one switch as a home [ that's the annoying bit in Mach, it know which switch is the home but not limit plus or minus ????? ]

This is why you need 3 inputs, two switches daisy chained for X,Y and Z input into pins 11,12 and 13, inputs 2,3 and 4 on Roys board.

Then go into config > ports and pins> input signals and tick them all down to Z home.

Set the port number to 1 and all the pin numbers on X to 11, Y to 12 and Z to 13.

that sets limits up.

Then go to Config > homing> and use home neg to set which switch you want to home at. Ticked is one switch, cross is the other.

.
PS Done with my bits yet ?

[HiltonSteve]

.
PS Done with my bits yet ?

Nope..... Hang on....what bits????

Just watched video on mach3 website about limits and homing (http://machsupport.com/videos/), god that blokes got a boring voice, fell to sleep after 5 mins and only just woke up!

But in the dream I had whilst sub-limily listening to him, he did seem to make out that it was possible to have switch's working both as home and limits. But did not go into the wiring in too much detail.

What about using 2 inputs, 1 for the X+ Y+ Z+ and one for X- Y- Z-, would this get round the jogging off problem?

Found some limit switch's, bit big but they will do.

[audioandy]

Nope.....
What about using 2 inputs, 1 for the X+ Y+ Z+ and one for X- Y- Z-, would this get round the jogging off problem?
.

That don't sound a bad idea Steve might try that myself


Andy

[John S]

What about using 2 inputs, 1 for the X+ Y+ Z+ and one for X- Y- Z-, would this get round the jogging off problem?

Sorry no it's internal in Machs core that it sees a switch, no idea which switch.
If you keep Z+ and Z- to one input at least you can see what the problem is on the diagnostics page if you have problems.

Link Z-, Y- and Z- to one input will work but if it stops it shows the input has triggered but which one ?

.