Closing the loop with Linuxcnc, adding encoders to Mesa FPGA?

[Desertboy]

I realised if I read this right I can't use the 7i85s for the spindle because I want 4 step/dir's but I could use a PP BOB for that function.

If I am going to set it up with linuxcnc want dual homing on the bottom axis.

[Kitwn]

If I am going to set it up with linuxcnc want dual homing on the bottom axis.

This thread will help you with this bit:

http://www.mycncuk.com/threads/12687...LinuxCNC-v-2-8

[Desertboy]

This thread will help you with this bit:

http://www.mycncuk.com/threads/12687...LinuxCNC-v-2-8

Thanks I have had it running linuxcnc but never got the dual homing working, I assume you still have to use the Beta for dual homing? (Was 2017 I had it running on linuxcnc)

At the moment I'm using just a cheap BOB through the PP which limits my speed to ~2m/min with the PC generating the steps but I have but the Mesa 5i25 PCI card that can generate 10mhz per axis which is enough for anything I might use.

I need a BOB for the 5i25 to connect the step/dir to, everything else connect through a cheap bob and parallel port.

I've had an issue with sizes on my machine it's a very weird problem, this is why I swapped back to linuxcnc but if I can close the loop as well that would be a bonus.

I think all I need is the 5i25 and 7i85s plus 4 Nema's with encoders and a lot of setting up lol.

The 5i25 are FPGA's which you flash a core onto so you need to get the correct cores for your application.

I'm going to buy a Raspberry Pi touch screen, 7" 1024*600 ~£40 ebay from UK seller, this has vga (and HDMI) in and usb touch screen support for linux so I can fit the screen on the front of the machine and keep everything mounted to the table the machine sits on.