How to Calculate the Pulse Count for the Planetary‑Geared A‑axis --- AH60‑XX80
Parameters of the AH60‑XX80 A‑Axis
The AH60‑XX80 is a planetary‑geared A‑axis (rotary axis) designed for OMIOCNC routers. To set the correct pulse count in your CNC controller, you need to know three key parameters:
- Stepper motor step angle: 1.8° per full step, therefore 200 pulses are required for one full motor revolution (200 × 1.8° = 360°).
- Driver micro‑step setting (default for X8 square‑rail USB machines): 8 micro‑steps per full step.
- Planetary gear reduction ratio: 10:1 — the motor must turn 10 times to rotate the chuck once.
Calculating Pulses Per Degree (Default 8‑Micro‑Step)
Follow the formula below to calculate how many pulses are required for the chuck to rotate one degree:
Motor full steps per revolution: 200
Micro‑step multiplier: 8
Reduction ratio: 10
Pulses per motor revolution: 200 × 8 = 1,600
Pulses per chuck revolution: 1,600 × 10 = 16,000
Pulses per degree: 16,000 ÷ 360 ≈ 44.444
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