New build with recycled parts on a ridiculous budget 120cm*60cm work area

**Desertboy** · 01-11-2017

Quickie question, I'm sure this is ok

I have 3 microswitches at moment 2 on the Y axis (Dual ballscrew) and 1 on the X axis, I want to wire from the Y axis microswitch to the 1 of the X Axis microswitches in series and then to the BOB X input and the other Y axis switch to the Y input is this ok?

**Clive S** · 01-11-2017

Originally Posted by Desertboy

Quickie question, I'm sure this is ok

I have 3 microswitches at moment 2 on the Y axis (Dual ballscrew) and 1 on the X axis, I want to wire from the Y axis microswitch to the 1 of the X Axis microswitches in series and then to the BOB X input and the other Y axis switch to the Y input is this ok?

I would keep the Y switches on the there own inputs . Can you sketch a circuit of what you intend to do?

**Desertboy** · 01-11-2017

Originally Posted by Clive S

I would keep the Y switches on the there own inputs . Can you sketch a circuit of what you intend to do?

I've run the X axis (Gantry) to the X input and the 2 Y Axis limits to Y & Z, when I add a Z I'll add it to the the same input as the Y but will get better electronics than this BOB soon but have other things I'd rather do first.

**Clive S** · 01-11-2017

Originally Posted by Desertboy

I've run the X axis (Gantry) to the X input and the 2 Y Axis limits to Y & Z, when I add a Z I'll add it to the the same input as the Y but will get better electronics than this BOB soon but have other things I'd rather do first.

I thought you was connecting up the home switches before. The limits can all be connected in series together.

**Desertboy** · 01-11-2017

Originally Posted by Clive S

I thought you was connecting up the home switches before. The limits can all be connected in series together.

Yes limits/home dual use.

**Neale** · 01-11-2017

How are you planning to use the dual home switches (Y axis in your case?). Generally you do this for gantry squaring, but only if your motion controller supports this (and not all do!). I don't think that Mach3 can do this either. I have the same problem on my own machine, by the way, and not trying to pick holes in your design. It's just one of those things that isn't obvious until you come to try to do it...

Personally, I home my dual-axis using just one home switch and manually tweak the other side for squaring purposes as my motion controller is no help at all in this area.

**Clive S** · 01-11-2017

I don't think that Mach3 can do this either.

Neale I think Mach3 can do dual homing. UNCHECK "Home Slave with Master" in General Config. You may also need to modify your Ref All script to use RefCombination() to get the two sides to move together.

**Desertboy** · 01-11-2017

Originally Posted by Neale

How are you planning to use the dual home switches (Y axis in your case?). Generally you do this for gantry squaring, but only if your motion controller supports this (and not all do!). I don't think that Mach3 can do this either. I have the same problem on my own machine, by the way, and not trying to pick holes in your design. It's just one of those things that isn't obvious until you come to try to do it...

Personally, I home my dual-axis using just one home switch and manually tweak the other side for squaring purposes as my motion controller is no help at all in this area.

I'm going to try linuxcnc which does support gantry squaring (Whether it works with my BOB we'll see) at least in 2.8, a quick google and it appears mach 3 does as well.

I'll try mach 3 as well, I planned a 2 pc setup for the cnc machine just in case with windows 7 & Fusion on one and the other with linuxcnc that way I can try both easily and have convenience of cam next to the machine.