Cobra 42 Turret iindexing problem

[BobM3]

I have the 21-T control. When the turret tries to index it rotates some amount then tries to seat. It should rotate 30 degrees per tool but it doesn't. The encoder that is connected to the turret shaft seams to be o.k. (I can rotate it by hand and the display on the 21-T screen makes sense). I can also rotate the turret manually by setting bit 2 of K2 (keeper relay). It seems to be in control. It's like the machine has forgotten it needs to rotate 30 degrees/tool. Are there parameters that store info on the turret? Its encoders?

Similar Threads:

• HELP - Kia 15 turret problem
• Need Help!- OKUMA LU-15 B Turret problem
• SL 10 turret problem

[brawlerman]

did you get this fixed?

[Branko_M]

Bumping the thread. I have the same problem and was interested if anyone found solution.

[Factory Guy]

This procedure should help.

Turret Home Set-up Cobra 42

1. Change Parameter Write Enable: Select MDI from Operator Page. Press Offset /

Setting Hard Key. Press Setting Softkey.Cursor to Parameter Write Enable

Press 1 then Press INPUT .

2. Set parameter 1850 A to a 0. Press System hard key ,Press Param soft key , key in

1850 Press No.SRH soft key. Press cursor key down to highlight A , Key in 0

Press input.

3. Turn Control Off.

4. Turn Control On , E-stop Reset , Close Guard Door.

5. Set the main air pressure to about 35 PSI.

6. Select Ref. Mode on Operator Panel.

7. Press Feed-Hold & Cycle Start simultaneously to Reference Return the turret. -

( the Turret should Raise And Rotate, if Not see the Next Page Note.)

8. In MDI mode, set PMC parameter K 02.2 to 1

To get to the PMC K-words Press: System (Hard Key), Pmc (Soft Key),

Pmcprm (Soft Key),Keeprl (Soft Key). Cursor down to K02

(Byte number 2 is the third number over from the right).

K02 normally reads 10010000, Change it to 10010100

9. Press Collet Open/Close button to unseat (raise) the turret.

10. Press Cycle Start or Feed-Hold buttons to rotate the turret CCW or CW to align

the top-plate to station # one (1).

11. Seat the top plate (press Collet Open/Close). Make sure the turret seats straight

and all the way down.

12. Press System , Press Dgnos , Type in 301 , Press No. Srh

13. Divide the value in DGNOS 301 A (mach position) by 10 and enter this value into

Parameter 1850 A. Press System hard key ,Press Param soft key , key in 1850

Press No.SRH soft key. Press cursor key down to highlight A , type in the value

press input.

14. Turn Control Off.

15. Turn On the Control ,E-Stop Reset , Close Guard Door.

16. Select Ref. Mode on Operator Panel.

17. Reference return the turret. (press Feed-Hold & Cycle Start simultaneously).

18. Set the main air pressure to 80 PSI.

19. Select Jog mode

20. Index to all turret stations in both directions observing Dgnos 301A , the counts

should end within plus or minus 30 counts. Example:

24000,27000,30000,33000,36000.

21. If more than 30 counts, change parameter 1850A and then reference return the

turret again.

22. Change Parameter Write Enable: Select MDI from Operator Page. Press Offset /

Setting Hard Key. Press Setting Softkey.Cursor to Parameter Write Enable

Press 0 then Press INPUT

23. Press RESET