This formula is nothing very special but I had to think some time about it. 😉 For my CNC I need to calculate the speed of the machine in mm/min (seems this is the standart measuring unit at least in metric systems). Here it is:
An example:
– Threadpitch: 0.8mm
– Steps/Revolution: 200 Steps
– Microseconds/Revolution: 1.000 micros
Hope this is correct! 😉
As I researched about my own custom G-Code interpreter on the Arduino I realised that it was neccesary to interpolate between two points in space. Thats because when both stepper motors step at the same time at the exact same speed a target value is reached too soon when one coordinate is not equal to the other ( x != y).
To avoid that problem one has to interpolate between the points and check if the interpolated value has to in- or decrement. I came up with this function to return an interpolated coordinate on the vector between the points:
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long linearInterpolate(long a1, long b1, long a2, long b2, long C1) { long _C2 = 0; if(a1 == a2) { _C2 = b2; } else { _C2 = b1 + ((C1-a1)*b2 - (C1-a1)*b1)/(a2-a1); } return _C2; } |
Some reference and further reading on that topic here!
I thought its time to learn something new in my sparetime so the TurnMachine is my first attemp in building usefull machines with the help of the Arduino development plattform. Arduino is an electronics plattform made especially for artists and people who want to learn microcontroller programming the first time without the hassle of studying electronics in depth. I build this as a finger exercise for Continue Reading →
