Hi all!
For those who are not familiar with the project
PhotoPizza- This open project rotating object table for photographing objects from all sides (3D photo-360, spin photo). The platform control unit is based on Arduino.You can assemble this device yourself from available components using detailed instructions, and you don’t need deep knowledge of electronics.
Official project page
The new platform is made of PVC (Polyvinyl chloride) and weighs only 5 kg At the same time, it can withstand loads up to 40 kg
For load capacities up to 100 kg the platform must be assembled from acrylic.
Advantages and disadvantages of using PVC material
Very lightweight material and is suitable for turntables with a small load capacity (30-50 kg), the load capacity depends on the uniform distribution of the mass of the photographed object along the plane of the rotating disk. If you distribute the weight correctly, you can place an object weighing 60-70 kg. Due to its light weight, the platform is convenient to use for on-site photography, even taking into account transportation using public transport. White material makes it easier to shoot subjects against a white background, but I don't recommend using the standard drive of any streaming platform. The disc wears out and gets dirty, and therefore, it is necessary to place an additional circle of paper on top, or better yet, thin paper. matte plastic, thickness approximately 0.7 mm. Unlike acrylic, PVC material much softer and can be pressed after applying a point load, at the same time, it is more popular in the field of outdoor advertising, costs less and it is easy to find scraps for turntable parts.The new design of the clamping system has become simpler and more efficient
The new design also provides the possibility of assembly with fixation of the upper disk.
And here is the process of assembling the platform
Platform characteristics
In this non-transparent version of the platform, the upper disk is attached rigidly and cannot be removed without unscrewing the nut of the central axisMaterial - PVC 10 mm
30 kg
40 kg
Can rotate a person weighing up to 75 kg, but operation under such a load is not recommended.
Circle diameter - 480 mm
Suitable for photogrammetric 3D scanning of objects - this is a method of constructing a 3D model based on the analysis of a sequence of frames from different angles.
Possible shooting speed - 100 frames in 15 seconds
Customizable rotation parameters - acceleration, rotation speed, endless rotation, rotation by a certain number of steps, 4 customizable programs
Remote control with IR remote control and buttons at the bottom of the screen
Autonomous operation possible
Use as a hanging system:
Rated load capacity - 5 kg
Maximum load capacity - 10 kg
Weight and physical size:
Weight of the complete set - 5 kg
Height - Depends on engine height,70-90mm
Length, engine side - 565 mm
Width - 524 mm
Rotating disk diameter - 480 mm
In this article we will look at how the author, a self-made man, made a turntable for photographing small objects.
Tools and materials:
-Microwave;
-Plastic tray;
-Cutting board;
-Power cord with plug and switch;
-M4 bolt with nut and washer - 4 pcs;
-Screws 3*10 mm - 3 pcs;
-Rubber plug;
-Screwdriver;
- angle grinder;
-Metal scissors;
-Drill;
-Ruler;
-Pencil;
-Awl;
Step One: Microwave
The master took all the main details from microwave oven, with a non-working magnetron. Using a screwdriver and an angle grinder, he disassembles the microwave. For further work you will need the entire lower part. Platform, roller, motor, wire, coupler, glass plate.
Step two: turntable
For his product, the author took a round cutting board with a diameter of 230 mm and a thickness of 10 mm. There is a groove on the board whose diameter coincides with the diameter of the roller.
Finds the center of the board. Drills a hole with a diameter of 3 mm. Place the coupler in the center and mark the places for the hooks. Screws with nuts placed under the caps will be used as hooks. Screws in the screws. Trying on a coupler. Installs the roller into the groove. The roller fits exactly into the groove.
Step three: platform
A plastic plate is applied to the site and traced along the contour. Using scissors he cuts according to the markings. Drill along the edge of the platform, crosswise, four holes with a diameter of 4.5 mm.
Step Four: Assembly
Places a plate on the platform. Makes holes in the plate, like on a platform. A hole is drilled in the side surface for the wire. Installs a plug in the hole and pulls the wire through. Attaches the electric motor. Connects the wire and motor terminals. Screws a plastic plate to the platform.
Attaches the coupler to the motor shaft. Installs the roller and plate.
The turntable is ready. You can use the standard one glass plate, but wooden is better.
You can also install another table on the platform. The tables are centered using an awl.
This is an article with the idea that without high costs and effort, any person who likes to sit on a pond with a fishing rod has access to a homemade platform, or a chair with adjustable legs, For fishing. The information from this video will be of interest to those fishermen who fish in a modern way, that is, actively. Comfort while fishing is important to them. For those for whom going out with a fishing rod is just an excuse to drink vodka with friends in nature, or for those who continue to fish in the old-fashioned way and with antique gear, it hardly makes sense to waste time watching.
A lot of things for fishing and cheap in this Chinese store.
What do most of us use when fishing? As a rule, this is either some cheap folding chair, fishing box, or folding inexpensive chair. And everything would be fine, but... It’s uncomfortable to sit on a chair; your legs swell. It is comfortable to sit on the chair and box only on a flat surface. You can buy a not very expensive branded chair. Adjustment of the legs there occurs in a small range. And the chair itself will not be designed for people with heavy weight. You can buy a better chair, but the price...
For complete comfort, in addition to the platform, you can also take a footrest. A body kit so that everything is at hand. And then most of us understand that the loaf is not in the right place. But many people want to be able to fish conveniently. Particularly inquisitive people of our time wonder whether it is possible to sit while fishing both comfortably and inexpensively. The author of the video also asked himself this question. It turns out you can if you try to do it yourself. This is what the author found on the Internet. Beautiful, reliable, inexpensive.
People even make platforms with their own hands and spend time fishing comfortably. Someone will think that the author is mocking the respectable public. Where can I get space, tools, welding, etc.? But he doesn’t have all this either, but he wants to sit comfortably...
And these obsessive thoughts did not give everything last days rest for him. The other day he and his wife went to Auchan. There is little pleasure in walking between the shelves with products, he himself went in the sense of looking at what could be made from without much difficulty comfortable spot For fishing.
And I found something. 
Therefore, for this homemade fishing furniture you need the bare minimum of tools and you don’t have to be particularly hand-made. After wandering through the forums, I discovered that I was not the only one so smart. People already know about this and use it with all their might, including. 
Also, with the help of these and other furniture and construction gadgets, you can make a body kit. 
To solve the problem, I made a tabletop platform mounted on a swivel support.
To do this, you need the following:
Cut a platform from 20mm plywood. Drill in it through holes for bolts and insert with bottom side flange nuts. Temporarily secure the machine to the platform.
Make sure that the ends of the bolts protrude no more than 6 mm from the bottom, otherwise they will scrape the workbench. If necessary, replace the bolts with shorter ones or saw off the excess.
Remove the machine and secure the rotary support to the underside of the platform with screws. Drill a 25mm hole in the platform for a screwdriver and attach the assembled platform to the workbench.
Source: metro-office.ru
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- If you need to cut boards to length or precisely make complex bevels on parts, such a table-shelf for a saw with a blade with a diameter of 250 or 305 mm will allow you to achieve impressive results. Long
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- Having been involved in woodworking for many years, I was constantly faced with the problem of restoration planing knives. In the end, I decided to make my own sharpening machine.
Hello dear readers. We continue the story about the solar collector.
Start . In this article we will talk about my design of a rotating device. I served as a telephone operator in the army and had plenty of free time to engage in radio hobbyism. Knowing this, the company sergeant-major kindly asked to make a device for rotating the Christmas tree for his home. Where can I get a gearbox in the army, or at least gears? That's when the idea of transformation was born forward motion into rotation using a screw and cable. True, the tree rotated in different directions - a circle clockwise, a circle counterclockwise. But there was no need to make current collectors for the garlands. Well, in general, he liked everything.
The device is shown schematically in Figure 1. It resembles a worm gear and even retains its parameters and at the same time looks like a vernier. When the engine 5 rotates the screw 1 clockwise, if there is a right-hand thread on the screw, the threaded carriage 2 will move to the right, towards the engine, dragging the cable 3, which in turn will cause the pulley 4 to rotate. End contacts 6 are installed near the ends of the screw , which are used in the control unit to limit the movement of the threaded carriage. But for our rotary system we need to do the opposite. The pulley will be stationary, and in this case the platform on which the screw device with the motor and solar collector. This will give us the opportunity to place the whole thing on top of the rotating platform.
I thought for a long time about what could be adapted as a platform rotation unit. The problem resolved itself when he suddenly ordered to live long rear axle my favorite "goat". The rear wheel hub is what you need. We look at Figure 2. On the axle 4 there are two tapered bearings 2, on which the hub 1 itself, which has a flange for attaching the wheel disk, rotates directly. I tried to remove the excess and this is what happened - Fig. 3. Here the axle shaft, wheel disk and brake flap with all the accessories have been removed.
Of course, it is best to purchase at a flea market half of the bridge, which includes the axle shaft casing, then, if the solar collector (SC) is planned to be installed directly on the ground, part of the casing and part of the main gear housing (differential) are simply walled up in concrete base. If the SC will be located above the ground, then to attach the fixed part of the rotation unit, you can come up with a removable version of the device, using a flange for attaching the brake flap. There are many options, you just have to think about it. My drawing shows a plate in which stiffeners from steel corners are subsequently welded. Attach to them wooden shield. You can do it easier - just attach the platform directly to the wheel rim. And here there can be many options. Everything depends on the author’s imagination and his capabilities. And so, instead of the axle shaft inside the axle 4 in Fig. 2, an axle (Fig. 3) is rigidly attached to which the pulley is tightly attached. It is relative to this pulley that the SK will rotate. If the remainder of the axle housing is short, the axle can be welded inside (see Fig. 3). The length of the axle also depends on your imagination regarding the method of attaching the rotating platform. You can, of course, weld it at the exit, but here you have to be careful so as not to ruin the thread entry.
As a screw, you can use purchased studs, the diameter of which depends on the load. If possible, make screws with threads smaller than metric. In couplings 7 (see Fig. 1) under heavy loads, if you want, for example, to make an SC for heating water in a pool, it is better to use cone bearings. With a screw thread diameter of 22mm or more, front wheel hubs from, say, “kopeks”, or in short from the Zhiguli classics, are very suitable. See photo A. The hub can be cut off (see photo B) and a flange can be used to attach it to the platform, or you can leave only the part where the outer hub bearing is located, welding it to the corner. In this case, at the ends of the screw you need to make grooves with a diameter equal to internal diameter inner ring of the bearing of the outer hub support. It is equal to 19.050mm.
For light loads, the screw can be installed in couplings with plain bearings and thrust washers. See Figure 4. With such screw supports, torque must be transmitted to it using additional gears or a belt drive using pulleys. In this case, depending on the transmission coefficient, it is possible to use motors with less power and the rotation of the vehicle will be smoother. You can abandon the thrust washers and make couplings of a different design (see Fig. 5). Here the end of the screw rests on the ball from the bearing. Bronze bushings in the bracket must be firmly fixed. It is better if the hole in the bracket for the bushing has a side against which the end of the bushing or the edge of the groove on the bushing will rest.