Quesions on HomeAll and LimitAll (Resolved)

[dovrosenberg]

Simple question: I have an X, 2 Y, 1Z axis on my plasma running Acorn. There are limit switches on each end of each access (8 total). If I want to use HomeAll and LimitAll configuration in S14954 drawing - will the switches wired as Home also act as limit switches and prevent over travel in that direction? If so, I would wire X+, Y+, Y1+, Z+ to be home switches going to input 1 and X-, Y-, Y1-, Z- to be limit switches going to Input 2??
Thanks in advance

[Joey]

You can run all axis to the same input and assign the input as home/ limit all

You will need to assign the slave of the gantry separately as the slave home input for auto squaring

[ShawnM]

Save yourself a ton of headaches, wiring and wasted inputs and just use the negative switches. There's no need for all the extra switches and wiring when you could just use the "soft limits" built into Acorn.

As Joey mentioned wire X,Y and Z to one input set as "home all" and Y2 to it's own input labeled "slave input" if you are going to use auto squaring. This is the only way it works with auto squaring. If you are not auto squaring you don't even need the Y2 switch.

[dovrosenberg]

So if I understand correctly -
OPTION 1:
wire X+, X-, Y+, Y-, Y1-(slave), Z+, Z- to HomeLimitAll maybe onto Input 1

Map Y1+ to SlaveHomeInput on Input 2

OR
OPTION 2:
Wire X+, Y+, Z+ to HomeALL on Input 1
Set soft travel limits to cover X-, Y-, Z- (no switches)
Wire Y1+ to SlaveHomeInput on Input 2

Someone suggested using limit switches AND soft travel limits. You are suggesting to just set the home switches and soft travel limits - is that correct?

[ShawnM]

I'm suggesting wire X-, Y- and Z+ to input 1 labeled "home all" and Y2- to input 2 labeled "slave home input" and then setup your soft limits for the max table travel. You only need 4 switches to simplify this and make it work but you have to wire it per the manual if you want it to work correctly. All this is in the auto squaring manual.

Do you have mechanical switches or proximity switches? Are they NO or NC?

[dovrosenberg]

I have NPN NC Proximity switches

[dovrosenberg]

I'm suggesting wire X-, Y- and Z+ to input 1 labeled "home all" and Y2- to input 2 labeled "slave home input" and then setup your soft limits for the max table travel. You only need 4 switches to simplify this and make it work but you have to wire it per the manual if you want it to work correctly. All this is in the auto squaring manual.

Do you have mechanical switches or proximity switches? Are they NO or NC?

Based on your description, I would put a limit switches in the 3 red locations for X and Y and not worry about the other ends of X or Y gantries

[ShawnM]

I'm suggesting wire X-, Y- and Z+ to input 1 labeled "home all" and Y2- to input 2 labeled "slave home input" and then setup your soft limits for the max table travel. You only need 4 switches to simplify this and make it work but you have to wire it per the manual if you want it to work correctly. All this is in the auto squaring manual.

Do you have mechanical switches or proximity switches? Are they NO or NC?

Based on your description, I would put a limit switches in the 3 red locations for X and Y and not worry about the other ends of X or Y gantriesCNC.png

Correct, and then one of course at the top of the Z axis which is not shown.

X, Y and Z wired to input 1 which is HOME ALL and Y2 to input 2 as SLAVE HOME INPUT. Again, this is all in the auto squaring manual, do you have this manual downloaded? If you use auto squaring it can only be wired one way to work correctly.

What you label as Y on the left is actually Y1 and the slave on the right side is Y2 (it's the second Y axis drive)

[ShawnM]

I have NPN NC Proximity switches

You'll wire these in series and you should power them with 24 volts.

[dovrosenberg]

I'm suggesting wire X-, Y- and Z+ to input 1 labeled "home all" and Y2- to input 2 labeled "slave home input" and then setup your soft limits for the max table travel. You only need 4 switches to simplify this and make it work but you have to wire it per the manual if you want it to work correctly. All this is in the auto squaring manual.

Do you have mechanical switches or proximity switches? Are they NO or NC?

So with the suggested configuration- is HOME located at 0,0,0 in my picture or the opposite corner at the end of the soft travel limit? I have the document downloaded and am reviewing it to make sure I understand it. I am planning on using software pairing and auto home. Hopefully the auto square will work as well


Based on your description, I would put a limit switches in the 3 red locations for X and Y and not worry about the other ends of X or Y gantriesCNC.png

Correct, and then one of course at the top of the Z axis which is not shown.

X, Y and Z wired to input 1 which is HOME ALL and Y2 to input 2 as SLAVE HOME INPUT. Again, this is all in the auto squaring manual, do you have this manual downloaded? If you use auto squaring it can only be wired one way to work correctly.

What you label as Y on the left is actually Y1 and the slave on the right side is Y2 (it's the second Y axis drive)