Load turning operation
During load turning, diagonal pull between the two hoists is unavoidable so Konecranes developed special features for safer load handling in this application. Our die handling cranes only allow the load to be turned in a closed system as the hoists are pulled towards each other so no forces are introduced into the building structure.
Bidirectional overload sensing: After lifting a load higher than the load capacity of the small hoist, it is not permitted to lower the hoist with the higher load capacity during the entire turning process. Lowering the die in an inclined position is only permitted with the smaller lifting gear. If one hoist is overloaded, the other hoist is blocked in its lowering movement and only lifting at creep speed is possible. This prevents the overloaded hoist from being overloaded even more by lowering the load with the non-overloaded hoist.
Diagonal pull monitoring: The maximum permissible rope angle is measured during the entire turning process. If the permissible rope angle is exceeded, an emergency stop is generated and a fault message is displayed.
Customer story
Quick service response gets stamping plant back on track
It’s indispensable to have a service provider you can depend on to maintain your operations. For the 25 years I’ve been at Karmax, Konecranes has provided us with excellent products and timely service.
Mike Crevier, Maintenance Manager, Karmax, Canada
Features
- Two hoist trolley (THT) or separate trolley solutions
- Special features for safer load turning, rope angles up to 10 degrees possible
- Overload protection—system consists of load cells and overload detection unit
- Overspeed control of variable speed hoisting
- Smart Features
- Joystick Radio and pendant for backup and maintenance use
- Second brake for hoisting can be provided
- Frequency controllers for main movements
- Emergency brake
- TRUCONNECT Remote Monitoring
- Electrical room is pressurized and air-conditioned
Benefits
- Hoist synchronization provides fast and precise load handling
- Load turning features enable safe operation
- Semi-automated Smart Features help improve safety and productivity
- TRUCONNECT Remote Monitoring provides data for maintenance planning and assessing crane condition and safety
Technical specification
M-series | SMARTON | |
FEM | M6-M8 | M5-M7 |
Trolley type | Open winch | Open winch |
Lifting capacity - main hoist | Up to 63t | 30-63t |
Lifting capacity - aux. hoist | 20-32t | 20-32t |
Span | Up to 40m | Up to 40m |
Lifting height, max. | Tailored | Tailored |
Bridge/trolley travel speed | Tailored | Tailored |
Manual control | Radio/pendant | Radio/pendant |
Bridge/trolley power supply | Conductors/festoon | Conductors/festoon |
Motor control system | Konecranes variable frequency drives (VFD) | Konecranes VFD |
Electrical braking | Resistors/regenerative network braking units optional | Resistors |