Janome Y Encoder for QMPro 18 part QM29753
This item # QM2953:
This is # 6 in the picture. This is a "Y" encoder used on; Avante, Babylock, BLCJ18, BLCJ18-2 Crown Jewel II, BLCJ18-3 Crown Jewel 3, encoder, Handi Quilter, Janome, Quilt Maker Pro 18
Note you will need to use the black spring off your old encoder to put on the new encoder.
There is also the encoder under the back of the carriage (X axis) item QM29773