Drip Feed Problem / Greco

[salhab]

Dear All,
We have got a 1985 Cincinnati mill with Acramatic 850 , we have
purchased a BTR from Greco , and WinDNC , for short programs drip
feeding is great , but for long program the machine stops moving with
no error on the screen , once we push the start cycle bottom it
continuous
as if never stops , this may happen three or four times in a2 hours
program !! . The stops has no clear pattern and very random ,

Where is the problem ? Any help?
Thanks,


Shadi

[Digitech]

Please check the shield cable of RS-232 wire. It must be connected to Ground at one side, while other side must be left open in air. It might be due to external noise pick-up

[salhab]

The Cable is quality shielded , is the noise the only possible reason ? , could it be from the WinDnc , Is there an under DOS program instead?

Thanks ...

Shadi

[salhab]

The Cable is quality shielded ! Is the noise the only possible reason ? Could it be the WinDNC , is ther an under DOS program I should try ?
Thanks

Shadi

[Digitech]

The Cable is quality shielded , is the noise the only possible reason ? , could it be from the WinDnc , Is there an under DOS program instead?

Thanks ...

Shadi

Dear Salhab,

1) Since it is random I suspect a noise problem. It works well on short programs means, buffer is OK on Greco. The problem comes on long programs only. Because, Greco sends sends X-off signal which is acknowledged by Win-DNC.
But, when X-on comes from CNC side, it is not recognized hence machine stops for want of data from PC. X-on & X-off are software hand shake signals.

2) I do not think, DOS based program will solve this problem.
3) The cable is quality shield. OK. But one end must be ground & other end must be open in air to have a proper effect.
4) Try with smaller cable length.

- Deepak Bodhani
www.digitech-engineers.com

[justtx]

Has it ever worked in the past?