Hi everyone!
To start with, what a great forum! Tons of interesting reading before I´m starting up my own printer!
I want to build a delta but a little modification from the kossel mini as an extra challenge ;)
My goal is making the (heated) build plate approx 300mm in diameter and total height of 700-800mm (haven´t really decided yet).
Will also try to use slotted rectangular steel tubes (C-profile) as ABC-towers and let the carriage and belt be inside the tower for a clean look. This means that I will only use some parts from the original kossel mini design. I will see how this turns out, I´m still on the CAD...
But some questions comes to my mind.
I would really appreciate if anyone will take the time to answer some of my "newbe" questions! :)
With best regards
Wretan
To start with, what a great forum! Tons of interesting reading before I´m starting up my own printer!
I want to build a delta but a little modification from the kossel mini as an extra challenge ;)
My goal is making the (heated) build plate approx 300mm in diameter and total height of 700-800mm (haven´t really decided yet).
Will also try to use slotted rectangular steel tubes (C-profile) as ABC-towers and let the carriage and belt be inside the tower for a clean look. This means that I will only use some parts from the original kossel mini design. I will see how this turns out, I´m still on the CAD...
But some questions comes to my mind.
- I have looked a little bit on the Marlin firmware and what difference does the Delta_smooth_rod_offset and the Delta_carriage_offset do? Especially when I make a new linear bearing design... Isn´t the three other offsets (Delta_diagonal_rod, Delta_effector_offset and Delta_radius) relative the centerline the only important measures?
- And the last configuration about "Effective X/Y positions of the three vertical towers"? What should I use here? As I will CAD my frame I could of course use the theoretical distance/angle. But on the Marlins original setting the first row says: #define SIN_60 0.8660254037844386. What is this, and other values of positions, calculated from?
OR does the second question answer my first? I have attached a picture and Isn´t the position of the red line there relative to the centerline of the machine the most interesting? - Does the distance between the ball heads between two rods (yellow line in attached picture) make any difference? I suppose that it doesnt as long as they are the same both on the carriage and printer head :)
- I have checked the kossel frame calculator to get a rough length of the diagonal rods for my build but why should the rod lenght always x 0.8 of the horisontal openbeam? I suppose that longer rods also will work for example 0.9 or 1?
- And one final question. As a beginner I have hard finding a complete guide how to build a kossel mini, especially the electronic and firmware. (I have no experience of using arduino before this project).
Do you know any good (really good) tutorial for a complete build? I have seen a little bit there and a little bit here but I can´t recall that I have seen anything complete.
I would really appreciate if anyone will take the time to answer some of my "newbe" questions! :)
With best regards
Wretan