Huanyang HY02D223B manual speed control

[dazp1976]

Hi Dean, Managed to get it working using the pot on the front however the spindle only spins up to max 12,500 RPM. How do I get it to max 24k?
Thanks!
Edit: Just a note, when I set PD02 = 0 then it spins up to full speed (but then Im unable to adjust speed)

Sounds like half voltage.
Does it have a 5v-10v jumper inside.
What voltage are you supplying it?.

[grantx]

It has a single jumper currently sitting across VR.
How do I tell what voltage is being supplied?