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Manufacturing of Low Cost Semi Automatic Camera Slider

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Manufacturing of Low Cost Semi Automatic Camera Slider Research Article Manufacturing of Low Cost Semi Automatic Camera Slider Tamilarasan C1, Dinesh Sankar S2, Sundar Ganesh CS3, Srihari G4, Sadish Kannan S5, Aishwarya Senthil Kumar6 Abstract This papers deals with the efficient design of a camera slider. A camera crane is useful for getting high shots or low shots which need to move a great distance horizontally or vertically, without the expense and safety issues of putting a camera operator on a crane for a crane shot or laying track for a camera dolly. The slider has a movable carriage that is attached directly to the camera or attached with a tripod head between the camera and the carriage for more panning and angle options. It is difficult for the short film makers to capture the effective shots without any blurriness, noise and uninterrupted video. Hence, the equipment’s like tripod, slider, shoulder rig, crane are required to get proper quality of the captured shots. This equipment’s are of high cost, difficult to afford and are not portable. To overcome these factors, all the equipment’s are integrated as one compact device. In this paper the use of each equipment is analysed. The techniques of all the equipment was studied and integrated. Aluminium profile extension is used to integrate these equipment’s. Aluminium profile extrusion is mounted on the already available tripod stand. The functions of slider, shoulder rig, crane is gathered as a single component. The zooming, focusing and rotation of the camera axis is automated using servo motor, gear motor and servo controller. Keywords: Automatic film making system, Dolly, Camera Slider, Open loop control Introduction A jib is a boom device with a camera on one end, and a counterweight and camera controls on the other. It operates like a see-saw, but with the balance point located close to the counterweight, so that the camera end of the arm can move through an extended arc. A jib permits the camera to be moved vertically, horizontally, or a combination of the two. A jib is often mounted on a tripod or similar support.In filmmaking and video production, a crane shot is a shot taken by a camera on a moving crane or jib. Most cranes accommodate both the camera and an operator, but some can be moved by remote control. Camera cranes go back to the dawn of movie-making, and were frequently used in silent films to enhance the epic nature of large sets and massive crowds. Crane shots are often found in what are supposed to be emotional or suspenseful scenes A jib is somewhat more complicated than a simple lever, since almost always the camera’s aim needs to be controlled independently of the swing of the jib arm. This can be done by relatively simple mechanical means or by the use of remotely controlled electric servo motors. Since the camera operator is often not able to use the camera’s controls 1,2,4,5,6U.G. Student,3Assistant Professor, Department of Robotics and Automation Engineering, PSG College of Technology, Coimbatore. Correspondence: Sundar Ganesh CS, Department of Robotics and Automation Engineering, PSG College of Technology, Coimbatore. E-mail Id: [email protected] Orcid Id: http://orcid.org/0000-0003-2041-5249 How to cite this article: Tamilarasan C, Dinesh SS, Sundar GCS et al. Manufacturing of Low Cost Semi Automatic Camera Slider. J Adv Res Manu Mat Sci Metall Engi 2017; 4(3&4): 14-23. ISSN: 2393-8315 © ADR Journals 2017. All Rights Reserved. J. Adv. Res. Manu. Mat. Sci. Metall. Engi. 2017; 4(3&4) Tamilarasan C et al. directly or look through the camera’s viewfinder, a jib is and enables remote pan/tilt functions with focus/zoom often used in conjunction with a remote camera control for control. This setup can be operated by one person, or focus and zoom and with a portable video monitor. Fig.1 the circumstance may require two operators. In a two- shows a model block diagram of camera cane. A device operator situation, one person operates the jib arm/boom known as a “hot head” or “remote head” is attached to while another operates the pan/tilt/zoom functions of the the camera end of larger jibs. It supports the camera remote head. Figure 1.Block Diagram The camera cranes, slider, shoulder rig which are already tipping load. The stability-limited rated load for a mobile available in market are high in cost and completely manual crane supported on outriggers is 85% of the tipping load. in control. The already available camera crane, camera These requirements, along with additional safety-related slider, shoulder rig are as separate equipment. To integrate aspects of crane design, are established by the American all the equipment as one compact device. This project uses Society of Mechanical Engineers Mobile and Locomotive a jib crane arrangement using aluminium Extrusion, thus Cranes. making it more cost effective. Standards for cranes mounted on ships or offshore platforms Camera Crane are somewhat stricter because of the dynamic load on the crane due to vessel motion. Additionally, the stability of A crane is a type of machine, generally equipped with the vessel or platform must be considered. a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them Jib Crane horizontally. It is mainly used for lifting heavy things and transporting them to other places.The crane must be able A jib crane Fig.2 is a type of crane where a horizontal to lift the weight of the load,not topple and not rupture. member jib or boom, supporting a moveable hoist, is fixed For stability, the sum of all moments about the base of to a wall or to a floor-mounted pillar. Jib cranes are used in the crane must be close to zero so that the crane does industrial premises and on military vehicles[2]. The jib may not overturn. In practice, the magnitude of load that is swing through an arc, to give additional lateral movement, permitted to be lifted is some value less than the load that or be fixed. Similar cranes, often known simply as hoists, will cause the crane to tip, thus providing a safety margin. were fitted on the top floor of warehouse buildings to enable goods to be lifted to all floors. Stability limited rated load for a crawler crane is 75% of the 15 ISSN: 2393‐8315 Tamilarasan C et al. J. Adv. Res. Manu. Mat. Sci. Metall. Engi. 2017; 4(3&4) Figure 2.Jib Crane Cameramonitor which features you need in a monitor before you consider price. This way, you will most likely get a better overall While many people start by looking for a monitor within a understanding of the value of the features, which will specific price range, you may be better served by defining better fit your workflow. Fig. 3shows the camera monitor. Figure 3.Camera Monitor There are many different manufacturers’ on-camera view screen or EVF and one can position independently of monitors available in a wide range of features and sizes. the camera itself.This allows to use it as a composition and This may make choosing one on-camera monitor a daunting framing aid. Taking into consideration the size and weight task, even when selecting from a single manufacturer’s of an onboard monitor, the 5 to 7” monitors are generally lineup.One of the first criteria to consideration is whether preferred, with other sizes being useful mounted off the you want just a monitor or a monitor/recorder combination. camera and in special applications. Advantages of a monitor/recorder combination are creating high-quality recordings that your camera’s internal recorder Weight is often overlooked, until mounted the monitor and may not be able to match. are shooting handheld all day. The more weight, the more quickly you will get fatigued, and with fast camera moves, a For the most part, an on-camera monitor serves as a more heavy monitor may shift and upset your balance.If you just flexible viewing screen that is larger than your camera’s need a run-and-gun rig, with a more flexible view screen ISSN: 2393‐8315 16 J. Adv. Res. Manu. Mat. Sci. Metall. Engi. 2017; 4(3&4) Tamilarasan C et al. than the one on your camera, then extra inputs/outputs audio data from an HDMI-compliant source device[3]. and cross-conversion are most likely not necessary for you HDMI is generally considered a consumer interface, but it at this stage of the game. has made inroads into the professional world. Fig 4 shows the HDMI connection with monitor. SDI is considered the professional standard, and HDMI, found on DSLRs, is considered more of a consumer standard, an HDMI signal will degrade and become unusable after although it can be found on camcorders and even some about 49 feet, which limits your cable runs without using high-end cameras. At this point, it is probably a good idea a signal repeater. HDMI is not interchangeable with SDI to consider your budget. HDMI is an uncompressed all- signals, although there are converters available, and some digital audio/video interface for transferring uncompressed monitors will cross-convert from HDMI to SDI. video data and compressed or uncompressed digital Figure 4.HDMI with Monitor Camera Slider adjustments, and a brake knob sets the sliding rail in one place. The tabletop legs are integrated and fold back flat The camera Slider that allows your camera to have an against the rails when you’re ready to pack the slider away, extremely smooth and sliding motion.
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