Siemens alarm 10751: Channel %1 block %2 danger of collision due to tool radius compensation
SINUMERIK channel alarm · Siemens 840D/810D powerline
What it means
The radius compensation monitor predicts that executing the block would gouge the contour, e.g. because the compensated tool cannot follow the corner geometry. The block is rejected before motion to protect workpiece and tool. Reprogramming the approach/departure or using a smaller tool usually resolves it.
Likely causes
- Tool radius larger than internal corner or slot width
- Unsuitable approach pattern when activating/deactivating CRC (KONT/OFF combination)
- Contour step smaller than the compensation value change
Need the part urgently?
Send us alarm 10751 with your machine details — typical RFQ turnaround is 24–48h.