This protocol is proprietary to Fanuc and available on all of their control systems. The controller makes a request for positional data and the encoder has to respond correctly with data within a strictly controlled time state. Developed to meet a wide range of feedback applications, the
SHG-AF absolute linear encoder provides a true absolute position immediately upon power-up. The encoder does not use batteries or static memory to retain the positional data. True position can be reacquired once power is applied, regardless of duration or power-off movements.
Specifications
Output Signal - Fanuc serial absolute
Accuracy/Meter
±0.0004", ±0.0002", ±0.0001"(±10µm, ±5µm, ±3µm)
Resolutions
10µm, 5µm, 1µm or 0.5µm
Scale Travels
4" to 137.8" (102mm to 3.5m)
Scale Diameter
0.601" (15.25mm)
Reader Head Dimensions
2.05"H x 5.16"L x 1.10"D (52mm x 131mm x 28mm)
Reference Marker
n/a
Maximum Traverse Rate
n/a
Power Supply
5VDC ±5%, <350mA
Shock (11ms)
100g (IEC 69-2-6)
Vibration (55-2000Hz)
30g (IEC 68-2-27)
Sample Period
50µs
Environmental Rating
IP67, fully submersible (IEC 529) - Exceeds NEMA 6
Coefficient of Expansion
12 x 10-6K
Scale Material
316 stainless steel
Overall Scale Length
Scale travel length + 10.2" (258mm)
Standard Cable
15 core, 0.5m (20") non-armored
Maximum Cable Length
65.6' (20m)
Standard Connector
15 pin "D" type
EMC Compliance
BS EN 61000-6-2 and BS EN 61000-6-4