Fanuc Parameter 1860 Full __full__ ✦ ❲Secure❳

Technical Write-Up: FANUC Parameter No. 1860 (Reference Position Check)

6. Troubleshooting Alarms Linked to P1860

5. Effects of Incorrect Setting

| Problem | Cause | |---------|-------| | Alarm PS0030 or PS0031 | 1860 set too high → reference point signal missed due to overshoot | | Inconsistent reference position (drift every cycle) | Speed too high for deceleration zone length (dog/switch timing mismatch) | | Long cycle time | 1860 set unnecessarily low (e.g., 100 mm/min on a large VMC) | | Machine overshoots reference point | 1860 > rapid rate (not allowed; parameter clamped internally) |

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Mastering Fanuc Parameter 1860: The Complete Guide to Axis Acceleration/Deceleration Time Constants

Advanced: Using G10 to Change Parameter 1860 in a Program

Advanced programs can modify 1860 on the fly. This is powerful for optimizing roughing vs. finishing in one setup. fanuc parameter 1860 full

Format (Fanuc Macro B):

G10 L50 N1860 P1 R60  (Sets parameter 1860 for axis 1 (X) to 60 ms)
G10 L50 N1861 P2 R80  (Sets parameter 1861 for axis 2 (Y) to 80 ms)
...
G11                   (End parameter input mode)

Example Use Case:

• Tool 1 (Roughing endmill): Set 1860 = 120 ms for stability.
• Tool 2 (Finishing ball mill): Set 1860 = 40 ms for detail.
• Caution: Avoid changing parameters inside a high-speed look-ahead block (G05.1). Always command G05.1 Q0 (cancel AICC) before G10.

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8. How to Change & Verify

Procedure (on FANUC control):

1. MDI mode → OFFSET/SETTING → Parameter Write = 1
2. Press SYSTEM → PARAM → search 1860
3. Enter new value for required axis (e.g., 1860 X 3000)
4. Cycle power or perform reference return twice to validate.
5. Test: Run G28 X0; multiple times → check position display repeatability.

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4. Common Settings by Configuration

Below are typical values for Parameter 1860 based on common machine configurations. Technical Write-Up: FANUC Parameter No