Table 2 Operating conditions and target performance of hydraulic excavators
From: Spiral model development of retrofitted robot for tele-operation of conventional hydraulic excavator
| Â | Specification item | Spiral-1 | Spiral-2 | Spiral-3 | Spiral-4 | Products |
|---|---|---|---|---|---|---|
 Conditions | Operational temperature | 0–50 [\(^\circ C\)] | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | 0–50 [\({}^{ \circ }{\text{C}}\)] |
Operational humidity | Less than 90 [%] | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | Less than 90 [%] | |
| Â | (No condensation) | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | (No condensation) | |
Supply voltage | DC12/24 [V] | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | DC24 [V] | |
Impact strength | Max. 10 [G] | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | Max. 10 [G] | |
Vibration resistance | - | \(\leftarrow\) | \(\leftarrow\) | JIS1601D3B | JIS1601D3B | |
 Specification | Working lever range | ±100 [mm] | \(\leftarrow\) | ±110 [mm] | \(\leftarrow\) | ±110 [mm] |
Driving lever range | ±150 [mm] | \(\leftarrow\) | \(\leftarrow\) | \(\leftarrow\) | ±150 [mm] | |
Positional accuracy | ±25 [mm] | \(\leftarrow\) | ±5 [mm] | \(\leftarrow\) | ±2 [mm] | |
Response time | 500 [ms] | 200 [ms] | 100 [ms] | \(\leftarrow\) | 100 [ms] | |
Wireless distance | 50 [m] | 100 [m] | 1 [km] | 200 [m] | 200 [m] |