I had my F1 for almost two years, and I havent used it at all. Its in working condition, with old steppers and old control box, but I am making a modern control box, and retrofitting it all (the original control has a WellMill upgrade, and it will be for sale along with steppers once I m done)
I got some PRC BOB for the task (I have no clue whats the designation, nor the documentation for it) and I managed to connect the drivers and steppers to it - that was the easy part.
I also got a HX-SXPWM-A Pulse-Width DC motor speed controller Digital AC180V-260V DC180V
and I have little info on how to connect it to the BOB, and to the F1 DC motor.
I ll attach the photos I have with explanations provided by the sellers - and I hope someone more experienced could step in with suggestions on how to do it

the speed controller had these explanation


"Features
suit for the power of DC motor less than 1000w.
Suit for the current of your dc motor less than 6A
1, the input power supply (VAC): AC90-260V 50 / 60Hz (for global voltage)
2, the output armature voltage range (VDC): DC180
3, the output armature current range (A): 8A (If the working current over 8A, the motor will stop work)
If the current is too big need to increase the heat
4, the output excitation voltage range (VDC): 100/200 (default full-bridge rectifier, which is 0.9 times the input voltage)
5, the output excitation current range (A): 1A
6, the working frequency: 16 KHz
7, given signal mode (V / mA): default potentiometer, 0-5V, 0-10V, 4-20mA, PWM, touchtone
8, enable control mode (EN): switch
9, soft start (acceleration time adjustment range) (S): 0-10S (default 2 seconds)
10, soft stop (deceleration time adjustment range) (S): 0-10S (default 2 seconds)
11, double loop PI regulation (voltage and current) control is more reliable
12, IR torque compensation range: 0-100% (default 0)
13, overcurrent range: 0 setpoint (default 8A)
14, overcurrent mode: stop output and indication (display code E1)
15, short-circuit protection: stop output and indication (display code E0)
16, overheat protection: power tube temperature exceeds 100 ° off the output and the indication (display code E2)
17, built-in digital display module can display real-time operating voltage with current
18. Dimensions: Length 140mm × 98mm × height 38mm width
19, Connection: terminal type (convenient)
Working Environment
1, ambient air temperature: -10 ~ 40 ° C
2, the air relative humidity of 85% or less, well-ventilated
3, installed in a well-ventilated, no severe impact, no vibration, no explosion dangerous media and no case of conductive metal particles

Instruction manual
PWM signal requirements:
1, the default PWM signal level is 5V, the signal frequency 1KHZ above, with a load capacity of more than 0.5MA.
2,5V level without resistors in series with PWM input port,
10V PWM level from 0-10V input port or serial port 10K resistor in the PWM input,
12V level 3.9K resistor string from 0-10V input port or serial port 13.7K PWM input resistors,
24V level string 27K resistor from 0-10V input port or serial port 16.8K resistor PWM input"