Upright Regulation

Step-by-step how to regulate an upright piano action.
1. Hammer To String Alignment
2. Key Height & Level - 64-65mm/12mm
3. Dip - 10mm/black key match capstan rise
4. Hammer Distance - 42-46mm
5. Letoff - 2mm
6. Backcheck - 16mm
7. Aftertouch - jack free of hammer butt
8. Dampers - 1/3-1/2 of hammer movement
9. Pedals - 1-3mm lost motion
10. Final Check - smooth operation