Last weekend i decided to pimp my capische with some of my findings about a home built CNC Machine. As described in the
BubblegumCNC i put some stepper motors to my Proxxon KT70 and after doing the hardware i fiddled around with the
GRBL firmware for Arduinos with 328p Processors. As i found out, this is a perfect combination to my capische-Project because in this firmware i can tell the arduino exactly where i want to position my camera and the GRBL is doing the math of triangulating, setting the speed correct for every stepper depending on the steps it will have to move and the only connection i have to do is the serial connection and 1 pin (feed stop/continue) to stop the GRBL while taking a Photo. Here is a fritzing pic to show the wiring:
The thing i haven't found out is how to set up GRBL for the steps/mm in x and y direction because there is no mm in that direction but the GRBL will do a turn of the camera. What i know is that the Programming will be very easy. If i define the GRBL to take 3600 mm as 360 degrees to turn a timelapse-gcode will be
G01 x900 z750 f10
which will cause the capische to turn 90 degrees while moving the dolly 750 mm with 10mm per minute. The only thing i have to do is to turn the feed stop pin low every X seconds, take a photo and continue. The only investment i had to take is a Arduino Pro Mini 5V 16MHz for about 10€ and some wiring.
By the way this is the CNC conversion of the KT70 (missing Z-axis and limit switches)
If anyone knows a cheap way to build a Z-Axis you can leave me a comment. I have the NEMA17 stepper and a M8 threaded rod already lying here and i think i will use ball bearing telescope extensions from drawers.
