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SIEMENS S20 Y axis - correct zero pulse not found

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#81828

SIEMENS S20 Y axis - correct zero pulse not found | 28 January, 2019

Hello, I'm trying to fix this error and what I've done so far I cleaned (no scratches) measuring scale and swapped cards (gantry 1 & 2) and cleaned scale reader sensor. There are no spare parts, I'm just trding to narrow down the cause. Any suggestions?

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#81829

SIEMENS S20 Y axis - correct zero pulse not found | 28 January, 2019

1. switch the axis cards 2. switch the axis servo cards 3. make sure the distance between scale and encoder is 400um 4. check the signal by oscilloscope, adjust to have the right signal 5. replace the scale or encoder

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#81905

SIEMENS S20 Y axis - correct zero pulse not found | 6 February, 2019

Try changing conversion board. 2 big ribbon cables plug in to it. p./n 00321189. or the 2 ribbon cables may need to be reseated.

Thanks, Ryan

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#81906

SIEMENS S20 Y axis - correct zero pulse not found | 6 February, 2019

We've found the problem. It was fault scale encoder. Swapping cards didn't help. Thanks everyone for the input.

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