Plan B
Get a glass mat 12V battery out of my sprayer, remove the 48V gel cell pack, add the glass mat into the pack (with a charger on it since it is likely a bit low). 4 x 12V lead, 40.1V plus the new battery (on a charger - 14.1V)
Battery pack voltage is 54.2V
Hopefully one of these sets of parameters is 'close enuf' and I can use the settings to spin the motor soon. I don't understand what Paul is looking for in the response graph, so I've posted all of the tests.
Sorry about the span of the tests - I get impatient when I'm running tests and end up doubling instead of going up 2 at a time
Kp-id 2000
Ki-id 0
run-pi-test
file 50
Kp-id 2000
Ki-id 2
run-pi-test
file 51
Kp-id 2000
Ki-id 4
run-pi-test
file 52
Kp-id 2000
Ki-id 10
run-pi-test
file 53
Kp-id 2000
Ki-id 20
run-pi-test
file 54
Kp-id 2000
Ki-id 40
run-pi-test
file 55
Kp-id 2000
Ki-id 80
run-pi-test
file 56
Kp-id 2000
Ki-id 160
run-pi-test
file 57
Kp-id 2000
Ki-id 320
run-pi-test
file 58