Hello, dear readers and DIY!
One of the important stages of processing of various products is grinding. There are many manual and mechanical devices.
In this article, the author of the YouTube channel “Daniele Tartaglia” will tell You how you can make a small hand grinder, vibrating with the power from the battery.
This project is very easy to manufacture, and can be repeated in the home environment.
— PWM engine speed control 1203B DC 6V-28V 3A
— The 550 motor and 7.4-24 In 10000-30000 RPM
— Battery Li-Po 7.4 V 2S
— Charger 2S 3S
— Aluminum transitional coupling, strip
— Bracket for mounting the engine
— M3 screws, washers, lock nuts, screws for wood
— Sheet plywood
— Disc sander attachment
— Wire, solder, shrink tube
— Double-sided tape, sandpaper, a two-component epoxy adhesive.
The tools used by the author.
— A drill, electric jig saw
— Laboratory power supply 30V 10A
— Soldering station, the third arm with backlight
— Vices, clamps, hand saw, file, knife
— A ruler, a square, a marker, a screwdriver.
The process of making.
The basis for the typewriter was taken sanding disc with Velcro. As the abrasive will serve these sheets of sandpaper for renovation.
From the grinding disc cut off the nut with a ledge with a hacksaw.
To make it easier to position the parts on the sole, the author decided to make an additional base made of plywood form replaceable sheets of sandpaper. After marking the contour, the workpiece is fixed to the workbench with clamps, and cut by an electric jigsaw.
For grinding edges, rounded edges, the wizard uses a combined grinding stanochek own making. About how it can be done independently, was described in a recent article.
Then, with a file, the author aligns the upper part of the disk.
She transferred the contours of the plywood blanks, and the unnecessary parts are cut with a jigsaw.
Burrs left after cutting are removed with a knife and sandpaper.
The heart of this machine will serve that such motor RS-550. It is very rapid (10000-30000 rpm), and is powered by 6 to 24 V.
To install the motor on the basis of the author cuts out of plywood strip across the width of his body.
This plywood part of the motor will be attached with the standard bracket. The band put marks for the screws.
In the band drilled four holes with a diameter of 3 mm.
On the lower side of this part is glued with double-sided tape. It’s more convenient to connect with her soles and continued to drill holes for screws.
Through both parts and the bracket are passed the screws are M3 countersunk head hex slot.
Putting on the screws washers, tighten nuts.
The connection of the platform with stand is additionally enhanced with screws.
The sole is glued to the plywood with two-component epoxy glue.
Through the plywood and drilled a pilot hole, and in several places to tighten the screws, further pressing the sole to the base.
Once the adhesive has polymerised, the author establishes the standard screws on the engine stand.
To create eccentric, will use aluminum transitional coupling.
It is secured to the motor shaft.
The Cam itself will consist of nuts, which will be held on the second hole of the clutch with the screw.
On the laboratory power supply unit , the author sets the voltage (which will provide the battery) to 7.2 V. Current when the engine was 3.54 And that is quite a lot. Design engine a few times, jumped over the bench.
The author decided to check at what voltage the motor will run stably. It was 3.5 V.
To adjust the engine speed, the author applies here’s a PWM module.
Connecting the motor using this module, you can clearly see that while reducing the speed decreases the current.
For arm you need to cut here these two stand, two pieces of plywood connected double-sided tape.
Between these parts, at the top, on the screws fixed rectangular jumper.
It remains to tie the handle to the sides of the lining at the base.
Then tried on the controller Board, and the excess lining is trimmed.
To the input Board, connect the two power wires and output wires of the engine.
The battery will be mounted on the side of the handle with aluminum strip. The author bends it in the shape of the battery.
Tries again, and cuts off the excess. The sharp corners of mount worn down with a file, then drilled and sensource two holes for the screws.
To the side of the battery is blocked by two nuts screwed to the base.
After checking the efficiency of the battery, the speed controller is screwed to the base.
Rotating the Cam to not hurt my hands, for it is protective cover.
It is fairly easy to bend out of transparent plexiglass and heat the latter in bends with hot air from a hair dryer or technical soldering station.
In the casing are drilled three holes for the screws, and it is screwed to the top of the arm.
To the wires on the power Board is soldered T-connector, the contacts are protected with heat-shrink tubing. It remains to plug in the connector to the battery.
Everything is ready, you can stick to the sole sandpaper Velcro.
And here are the results of grinding tests.
By repeating this construction, consider the normal cover for the Board and motor. In addition, it is necessary to deploy the engine is vertical, the action of the eccentric will appear much better.
To charge the lithium polymer battery requires here is the charger.
I thank the author for a simple but useful device for the workshop!
All good mood, sound health, and interesting ideas!
The author’s video can be found here.
Hello, dear readers and DIY!