BOB suitable for 3 axis+ B/C head build?

**marbles** · 20-07-2018

Hi Clive,
Two db25 boards. Interesting! I guess I would need another parallel port card in the PC. I have one of the green cards like this and a blue one as second link so enough between these two.

Potentially a bit of a head scratcher though eh. Is the software side straightforward, assigning ports and pins etc?

https://www.ebay.com/itm/CNC-6-Axis-...-/121480961528

https://www.aliexpress.com/item/Upgr...001497211.html

....Update

Just thinking about it I could use the one of the BOB to run the 3 axis and the slave and the other BOB to run the B/A axis and secondary sensors.

I'm not that familiar with parallel port/db25 instruction. Can I daisy chain the two boards together or do I need to run a separate card to the second BOB?

Much food for thought

**Clive S** · 20-07-2018

I'm not that familiar with parallel port/db25 instruction. Can I daisy chain the two boards together or do I need to run a separate card to the second BOB?

Not sure what you mean by this. But to use two PP BOB's you will need to P ports on the pc. so you would need another PP card fitted and the two cables one to each BOB.

I have been using Linuxcnc for these simple jobs but it is a learning curve. I think Mach3 can take at least two PP BOB's then you would set them up in ports & pins. Plenty of vids on the net for that.

**marbles** · 20-07-2018

Cheers Clive!
Yeh i've just been reading up on the setting up Mach3 with two PP ports. Think its a case of getting lucky if you dont get a driver conflict on the installed PP card however it'll resolve what I want. I have the boards so might as well give it a go :)