A single display is used for all modes of programming and operation.

The display

The display consists of two main areas. One shows a three dimensional view of the stage while the other shows data for the active que, its movements and drives. All common functions are available in the main view. Colors are used to show status. Errors and messages are displayed in clear text and can be linked to a database with system information. It is possible to change system texts and add notes to error events.  

The user can adapt and develop the 3D view. Drives can be combined to create objects, representing a ceiling or other larger element. 3D drawings can be imported and assigned to any object or drive, or even to the stage itself. The user can pan, zoom and rotate the picture, save views and assign them to ques.

The stage machinary

Most Visual act winches and lifts are based on synchronous or asynchronous servomotors of modern compact design. They are matched to intelligent servo amplifiers of high quality, allowing for accuracies and position errors to better then ±1 mm and full torque at all speeds including standstill. As all drives are connected to the control system by a communications bus all drive parameters, errors and status messages are available at the operator desk.

Drives are usually mounted in separate, independent cabinets. A fault with one axis will not affect operation of the entire system. The same is true for repairs and maintenance – any drive or motor can be serviced while the remainder of the system is operating. Drives are connected to their respective machines by connectors, such that they can be easily exchanged in the event of failure.

Maintenance and service

The system is easy to service. Technicians have read and write access to all system parameters and variables. The most common parameters are readily accessible through a status window. A firewall and software for remote control can be included, allowing a service technician to analyze and update the system from a distance.

Visual act can supply installations where all computer systems are doubled. A failure of one component will not stop the system. A redundant Ethernet ring is used for communication between computers. It is possible to repair or replace components while the system is fully operational.

Expansion and upgrades

The system is open and easily expanded. Additional drives or machines can be added at any time. Interfaces to other equipment, such as lighting desks or stage management systems, can be accommodated. Functionality is upgraded through software. An example of this is Visual act’s 3D system, where it is the path of an axis or multi-axis object that is programmed, as opposed to the object’s end position and speed.

Scalability and flexibility

Visual act’s control system is extremely scalable and suits both smaller and larger installations. The smallest system uses a controller no larger than a laptop pc while larger systems installed in 19” racks can control several hundred drives.