Pimping the mini-lathe

TB2 pins 2 and 3 are the PWM outputs (- and + respectively)

You need to update mesaflash to get the TB numbers:

github.com/LinuxCNC/mesaflash

I only just installed mesaflash using the instructions for that github link. What do I need to do differently to get the most current version?

Is there any documentation on the PWM setup? I just found:
Basic PWM setup:
setp hm2_7i96.0.pwmgen.pwm_frequency 10000
setp hm2_7i96.0.pwmgen.00.scale 24000 # full scale is 24000 RPM
setp hm2_7i96.0.pwmgen.00.output-type 1 # standard PWM and direction

And was wondering what the outut type is for only PWM in only one direction? or do I just use this and ignore the direction part?

It sounds like you did not install the latest mesaflash (so you are using the old one)
after building mesaflash, did you run "sudo make install" ?

git clone github.com/LinuxCNC/mesaflash.git
cd mesaflash
make
sudo make install

And yes standard PWM (mode 1) is correct

I followed the lines of the git instructions one by one, including make including the four list. When I repeat them

minilathe@minilathe:~$ git clone github.com/LinuxCNC/mesaflash.git
fatal: destination path 'mesaflash' already exists and is not an empty directory.
minilathe@minilathe:~$ cd mesaflash
minilathe@minilathe:~/mesaflash$ make
make: Nothing to be done for 'all'.
minilathe@minilathe:~/mesaflash$ sudo make install
[sudo] password for minilathe:
install -p -D --mode=0755 --owner root --group root mesaflash /bin/mesaflash
install -p -D --mode=0644 --owner root --group root mesaflash.1 /share/man/man1/mesaflash.1
minilathe@minilathe:~/mesaflash$

No need for flashing the 7i96, it was already set for the PWM on STEP4 / TB2

"fatal: destination path 'mesaflash' already exists and is not an empty directory."

You might try

cd ~
rm -rf mesaflash

and refetch/rebuild

I just did this and I get the TB names