Heidenhain Encoder - strange waveform help request

it would be  a sinus output  

is the a way to  controle if the scale  is still ok  ?

Yes, but you will need the interpolator box that converts
the 11 uA Sine/Cosine outputs of the scale to higher resolution
TTL quadrature signals.

These (EXE boxes) are commonly available on Ebay

EXE box 101 o r 102.

 

What controller you have on the machine ?
If it is old Heidenhain controller , then directly supporting the 11uA encoder so no EXE will be present .
If other brand controller obviously there will be EXE to convert into TTL quadrature .
To test whether 11uA scale head is alive , you may check for current flow by applying supply to pin (3)5V & (4)0V .
If no current flow observed then LED is dead and reader head wont work
For other pins 1&2 5&6 7&8 you can check with multi-meter on diode check mode.
or If supply connected to 3&4 , you can observe resistance will change on 1&2 5&6 7&8
This is the simplest method to know scale is working.

If you have access to old Heidenhain DRO you can quickly check the scale

it is a  Deckel FP2NC mill
when i power up  the machine  i see  the led inside the scale  is working  
but on the display  of the control unit of the mill the  x-value don't apeare 
y and z work  
i change x and  y  and now i have 2 problems  only z is still actieve  
maybe someone here had an old deckel console with the boards inside  ?
i need the  NZP board thats the input of the scale  maybe someone can help me out 
 

fons post=261218 userid=27700it is a  Deckel FP2NC mill
when i power up  the machine  i see  the led inside the scale  is working  
but on the display  of the control unit of the mill the  x-value don't apeare 
y and z work  
i change x and  y  and now i have 2 problems  only z is still actieve  
maybe someone here had an old deckel console with the boards inside  ?
i need the  NZP board thats the input of the scale  maybe someone can help me out 
 

You tried swapping the whole scale or just on the port connectors of X & Y .

Either case of swapping it cannot destroy the Controller PCB as the 11uA scanner head just has a source LED and 4 photo diode for 11uA of A&B signals .
or 6 photo diodes including Z.No other electronics inside .
Linear scales with visible light source usually has separate proximity circuit for Z marker.Usally with a settable metal strip.

If source LED is visible working remaining is header gap alignment and wiring.
Scales of newer version will have infrared LED and invisible to naked eyes .