Daewoo Puma CT250 Lathe

Dear Experts

When we are trying to index turret, it indexes just a little and stops with operator message number 2047 - turret clamp switch alarm or turret control unit alarm

Please find below our observations/actions

1. Output for unclamp gets ON & also output for either CW/CCW rotation also get ON, but it just indexes a little and message 2047 appears
2. Hydraulic system pressure is ok ie 50 bars
3. 110V appears to socket over CW/CCW solenoid
4. With this message number 2047, alarm output A5.6 gets 1 but we are unable to locate A5.6 in ladder - please let us know on how to correlate this A with corresponding R or D bit to further understand reason for message 2047
5. Only once or twice in last 8 hours, we found it got unclamped, indexed and clamped properly - during that 8421 BCD code rightly matched with station number of turret , also strobe signal was 1
6. Found little oil inside gland of encoder - cleaned same with pneumatic air
7. Turret encoder cable continuity checked and found alright

Request your advice for the above - do u suspect turret encoder to be malfunctioning or some issue related with solenoid valve or contamination inside hydraulic manifold on which valves are mounted



Few more observations please
1. Now after unclamp, turret indexes by about 3 degrees and stops
2. When we rotate disc by hand, shaft having clamp proximity switch also rotates, hence we feel drive mechanism inside turret assembly is intact
3. Hydraulic system pressure is 40 bars
4. Manually we pushed spool of unclamp solenoid valve and then pushed spool of CW rotation, it rotate few degrees and stops, moreover when we press spools for unclamp, CW/CCW rotation, we dont feel any pressure rather it is very smooth ie spool going inside smooth - we doubt this is due to inadequate pressure to Hydraulic Manifold
5. We have decoupled hydro motor and disassembled to see all 8 small pistons along with gear to be fine
6. We have removed pressure line from manifold, found oil coming out of it with pressure but when we press spools of unclamp and CW/CCW rotation solenoid, no oil comes out of return line on manifold
Dear Experts

When we are trying to index turret, it indexes just a little and stops with operator message number 2047 - turret clamp switch alarm or turret control unit alarm

Please find below our observations/actions

1. Output for unclamp gets ON & also output for either CW/CCW rotation also get ON, but it just indexes a little and message 2047 appears
2. Hydraulic system pressure is ok ie 50 bars
3. 110V appears to socket over CW/CCW solenoid
4. With this message number 2047, alarm output A5.6 gets 1 but we are unable to locate A5.6 in ladder - please let us know on how to correlate this A with corresponding R or D bit to further understand reason for message 2047
5. Only once or twice in last 8 hours, we found it got unclamped, indexed and clamped properly - during that 8421 BCD code rightly matched with station number of turret , also strobe signal was 1
6. Found little oil inside gland of encoder - cleaned same with pneumatic air
7. Turret encoder cable continuity checked and found alright

Request your advice for the above - do u suspect turret encoder to be malfunctioning or some issue related with solenoid valve or contamination inside hydraulic manifold on which valves are mounted



Few more observations please
1. Now after unclamp, turret indexes by about 3 degrees and stops
2. When we rotate disc by hand, shaft having clamp proximity switch also rotates, hence we feel drive mechanism inside turret assembly is intact
3. Hydraulic system pressure is 40 bars
4. Manually we pushed spool of unclamp solenoid valve and then pushed spool of CW rotation, it rotate few degrees and stops, moreover when we press spools for unclamp, CW/CCW rotation, we dont feel any pressure rather it is very smooth ie spool going inside smooth - we doubt this is due to inadequate pressure to Hydraulic Manifold
5. We have decoupled hydro motor and disassembled to see all 8 small pistons along with gear to be fine
6. We have removed pressure line from manifold, found oil coming out of it with pressure but when we press spools of unclamp and CW/CCW rotation solenoid, no oil comes out of return line on manifold, we are trying to clean manifold

Please advice