What causes Okuma OSP alarm 1783?

Unclamp limit switch out of adjustment so it never makes. Low hydraulic oil pressure to the unclamp circuit. Unclamp solenoid valve not shifting. B-axis brake not releasing (code 3).

How do I fix Okuma OSP alarm 1783?

1. Read the code number shown with the alarm: code 1 = Turret unclamp confirmation switch did not turn ON; code 2 = TA-axis clutch connect confirmation switch did not turn ON; code 3 = B-axis brake OFF confirmation switch did not turn ON 2. Read the code on screen: 1 = turret unclamp confirm switch never turned ON; 2 = TA-axis clutch connect confirm switch never ON; 3 = B-axis brake OFF confirm switch never ON. 3. Code 1: watch the unclamp limit switch while commanding unclamp; if the turret physically unclamps but the switch does not change state, readjust the switch position. 4. Check hydraulic pressure at the turret unclamp circuit; low oil pressure will leave the turret clamped even with the solenoid energized. 5. Confirm the unclamp solenoid valve is being energized and actually shifts; a stuck or dead coil leaves the turret clamped. 6. Code 3: check the B-axis brake release function and its confirmation switch; a brake that stays applied blocks unclamp. 7. If the alarm returns after these checks, record the alarm number, code and object and contact Okuma service.

Okuma OSP codes

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Okuma OSP Controller

Tool Changer · Intermediate

Alarm 1783

Okuma OSP Alarm A 1783 - Turret unclamp time over

The control commanded the turret to unclamp but the unclamp confirmation did not come on within the allowed time, so indexing cannot start. Depending on the code, the missing confirmation is the turret unclamp switch, the TA-axis clutch engage switch, or the B-axis brake release switch.

Okuma OSPTool ChangerIntermediate

1783

Okuma OSP Alarm A 1783 - Turret unclamp time over

Turret unclamp time over

Common Causes

Unclamp limit switch out of adjustment so it never makes
Low hydraulic oil pressure to the unclamp circuit
Unclamp solenoid valve not shifting
B-axis brake not releasing (code 3)

Troubleshooting Steps

1Read the code number shown with the alarm: code 1 = Turret unclamp confirmation switch did not turn ON; code 2 = TA-axis clutch connect confirmation switch did not turn ON; code 3 = B-axis brake OFF confirmation switch did not turn ON
2Read the code on screen: 1 = turret unclamp confirm switch never turned ON; 2 = TA-axis clutch connect confirm switch never ON; 3 = B-axis brake OFF confirm switch never ON.
3Code 1: watch the unclamp limit switch while commanding unclamp; if the turret physically unclamps but the switch does not change state, readjust the switch position.
4Check hydraulic pressure at the turret unclamp circuit; low oil pressure will leave the turret clamped even with the solenoid energized.
5Confirm the unclamp solenoid valve is being energized and actually shifts; a stuck or dead coil leaves the turret clamped.
6Code 3: check the B-axis brake release function and its confirmation switch; a brake that stays applied blocks unclamp.
7If the alarm returns after these checks, record the alarm number, code and object and contact Okuma service.

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