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    Deckel FP4NC Dialog 11 : Error 7104

    Thank yor for your support. I got access to the bosch servo amplifier handbook. There is a table that shows that DIP switches on the "optimization modul" should be flipped to adopt tacho gens with 2.8mV/min or 1.8mV/min. I was playing with the DIP switch settings. After this coarse adjustment it...
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    Deckel FP4NC Dialog 11 : Error 7104

    We could not manage to adjust the speed error so far. The adjustment range of the T pot is not sufficient. The speed error turns out to remain at -19000 (offset error =0, lag error=0). That's the best approach we could get. Erorr 7104 still appears. Is the procedure described above independent...
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    Deckel FP4NC Dialog 11 : Error 7104

    Hi everbody, I put my original post in the wrong forum. I could not manage to move it to the Deckel, Maho forum. My original post is found here https://www.practicalmachinist.com/forum/threads/deckel-fp4nc-z-axis-jumping-vibrating-while-moving.424420/#post-4190945 I was asked to post further...
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Thanks to Chris and Martin we could localize the fault and (almost) eliminate it. The problem was an erroneous signal from the tach generator that made the z-axis jump and vibrate as described by Ross Cummings in the link given at post #14. We replaced the z-axis servo. With the new servo the...
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Sorry to bother you again. Can't manage to finde Ross' "how to". Do you have a link available ?
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Thank's again. Ok I will check the schematic tomorrow again. Is there a manual how to remove the z-axis lead screw ? We have just the technical drawings but could not figure out yet how to remove the z-axis spindel (=lead screw) ? The table is already removed so if "it's very easy" to remove the...
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Hi Martin, thanks for your return. We dismounted the z-axis servo to see if the axis is moving freely and smooth. That's ok - the axis is not binding. "if screw is very worn" : which screw do you mean ? With the belt removed (table is supported) we fell some play of the toothed belt wheel of...
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Hi Chris, hi Stainless thank you for your responses. Chris: The servo is a "modern" type without brushes and commutator. The decoder uses Opto couplers for the rotary decoder . The device (s) for the tacho gen i could not identifiy so far because the label on the device is not readable anymore...
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    Deckel FP4NC Z-Axis jumping / vibrating while moving

    Hi, we have some trouble with our Deckel FP4NC with Dialog 11 control. While moving the Z-axis in positive or negative direction the axis moves smooth for a few millimeters and than starts vibrating and makes a rumbling noise for a few seconds. After that the axis moves smooth again for a few...
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