Detailed Answer
Portal crane luffing (boom up/down) control requirements: multi-speed (high-speed luffing + low-speed fine adjustment), limit protection (upper/lower limits), anti-tipping-back. Remote control luffing keys multi-speed + limit signal input to receiver. Lideral LD-12DK supports luffing control + limit interlock; Xingjia is suitable. Luffing is a high-risk action of portal cranes (center-of-gravity change); safety functions must be complete.
| Control | Multi-speed luffing |
| Protection | Limit + anti-tipping-back |
| Recommended | LD-12DK |
Note:Before luffing operation, confirm the limit device is effective.