Siemens alarm 136*: Contamination measuring system axis
SINUMERIK 840C legacy alarm · Siemens 840C
What it means
On measuring systems with a contamination signal output (e.g. EXE exposed scales), the measuring system reported contamination to the NC. Machining stops and NC START is interlocked; clean/service the scale per manufacturer instructions and clear with POWER ON.
Likely causes
- Dirt, oil film or swarf on scale glass
- Damaged scale seal allowing ingress
- Electronics falsely signalling contamination
Triage note: * suffix = axis index; POWER ON necessary to clear
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
linear scale per axis spare list
encoder · Check if others ruled out
Need the part urgently?
Send us alarm 136* with your machine details — typical RFQ turnaround is 24–48h.