Escapement settings#
Fields#
| Field |
Meaning |
| Type |
Deadbeat (better timekeeper) or Recoil (simpler, more forgiving) |
| Teeth |
30 beats seconds with a 1 s pendulum. Also sets the pallet span |
| Wheel Ø |
Tip circle diameter |
| Tooth H |
Tooth depth, tip to root |
| Drop |
Degrees the wheel turns freely each beat |
| Lift |
Degrees the anchor swings during impulse |
| Lock |
Deadbeat. Degrees the anchor swings while locked |
| Draw |
Deadbeat. Lean of the locking face. Keep 1–2° |
| Recoil |
Recoil. Extra swing the faces take |
| Arm W |
Anchor arm and pallet width |
| Bore Ø / Hub Ø / Spokes |
Wheel body |
| Arbor Ø |
Anchor arbor hole |
| Clockwise |
Wheel direction. Geometry, not a view option |
Targets#
| Measure |
Target |
Warns |
| Landing |
0.5 mm |
Note ≥ 0.25 mm, warning below |
| Run margin |
0.5 mm (always kept) |
— |
| Pallet tip clearance |
— |
Below 0.25 mm; red at contact |
| Pallet dive |
— |
Past ~45 % of tooth depth |
Default wheel trade-offs#
30 teeth, 100 mm, lift 3°, draw 2°:
| Lock |
Drop |
Landing |
Tip clearance |
Pendulum gets |
Note |
| 1° |
2° |
0.04 mm |
0.50 mm |
33.6 % |
landing warning |
| 1.25° |
2° |
0.25 mm |
0.50 mm |
32.8 % |
landing warning |
| 1.5° |
2° |
0.46 mm |
0.40 mm |
32.0 % |
default |
| 2° |
2° |
0.48 mm |
0.38 mm |
28.7 % |
dive at 98 % of limit |
| 1.5° |
1.75° |
0.45 mm |
0.25 mm |
33.8 % |
tip warning |
| 1.5° |
2.5° |
0.48 mm |
0.49 mm |
27.8 % |
|
Readout lines#
| Line |
Meaning |
If bad |
| Settings |
Repeats all fields |
— |
| Wheel centre to anchor arbor |
Arbor spacing to lay out |
Don't measure off the canvas |
| Pendulum must swing past |
Minimum swing to unlock |
— |
| Pallets dive |
Reach inside tip circle |
Deeper teeth, or less lock/lift |
| Impulse faces are steep |
Face angle from swing direction |
More lift or drop |
| Pallet tip clears the tooth backs by |
Closest gap over the swing |
More drop |
| Pendulum gets N % of the drive |
Energy budget |
Compare settings |
Related: How an escapement works