Metal hand Saw machine by 3DPVDB

Last crawled date: 3 years, 1 month ago

Using a carbattery, a lightswitch, a car-window-wiper-motor, and a 3D Printer, i've comprised a simple automatisation for the metal handsaw.
For even, straight cuts of INOX 316 & 304 linear rods,
electric tools were too violent, and resulted in ugly sawcuts, burr and slivers.
This is my 60$ weekend solution to a +300$ slowcutting metalsaw.
I figured that, if i added an arm to the wiper motor, i could make a circular motion,into a repetitive, linear one.
The next step was the math.
If i added an arm with a radius of half the distance the saw needed to back and forward,
the complete diameter would bridge that needed distance.
The saw needed to go 13cm and 7mm back and forward.
so the motor arms diameter from center to M3 pivothole at the end is 137mm/2=68.5mm
I can saw about 2x 8hrs before the battery tells me to do it myself.
So i've searched the web for a simple solartracker ardu sketch, uploaded it to a ArduProMini16mhz, aquired a set of LDR's, fished a servo out of my modelbuilding shoebox, and sketched a solartracker as well.
It moves a 18$ aliexpress 18v18w solarpanel. an 8$ solarcharger charges the carbattery. At sunny days, she charges the battery in 4days.
Carbattery;50$
Carbattery clamps; 4$
Leads; 2.5mm² copper insulated musicwire
Solarcharger; 20A: 8$
Solarpanel 18V18W; 18-22$
Ardu Pro Mini 16Mhz: depends on original or clone, but might i suggest original. the clone producers dont use their income to figure out new things for us. 5-16$
LDR; low sensitivity LDRs. (the cheaper, the less sesitive, but both work with correct resistors) 2-6$
Bearings mr93zz x8: price depends where you source them i guess.
Vid;https://3d-printersvdb.be/video-gallery/
As you can see by looking at the files, the assembly has been upgraded since the pics & vid. Its stronger now. 3mm wide plastic bended, and got ripped apart after a while.