Why f/32 for THCAD?

Lunkwill wrote:

Thanks for all the great work on plasmac! Is the f/32 recommendation in the user guide aimed at folks using parport? Since I've got mine plugged into a Mesa encoder port, seems like f/32 is throwing away 5 of my ~10 bits of ADC resolution.

f/32 is recommended by PCW of Mesa fame

I think guys using a parallel port are using f/64

Sending 1MHz signals through wire in an RFI rich environment leads to some issues.
1/32 is recomended for Mesa boards, with parallel use 1/64 or 1/128, depending on the latency of the used PC.
(edited) That it is still plenty for THC.
Last machine i built has THCAD set at 1/64, although the PC could reliably read 1/32 up to 185V ( could not test it higher ), and that is still very fine and very fast for tracking the torch at some pretty extreme slopes.
You will most probably be more limited by the speed of the Z axis, so do not worry about the THCAD.
To put is simple, no matter what or how, THCAD with Linuxcnc will beat any other THC i had the chance to play with, even some industrial ones costing 10 of thousands $.