Re: RepRap 3DR Delta printer Released

Hi,

Thanks again for your help.

>>Think of it this way take the position of the arm where it mounts to the vertical piece and make a line straight down where this line meets the build plate is the end point of the radius measurement the start of course is the center of the circular build plate.

You mean like described on this picture?



But as you see, the start is not the center of the circular build plate. I played with it in Solidworks and came out with this:



The start point is (in the above case for the Rostock) 33.5 mm away from the center...And diagonal Rod had to be 246 to have the optimal angel of 30 degrees... I think it was just rounded to 250 mm.

By the way, this value of 33 mm is also in the 3DR firmware, so I took the one from John, which is the same as Rich and took the measure:



Now, I know that the offset of the reflector is for the Rostock 33 mm and for 3DR 23 mm. So what is the distance left...the radius of the 3DR?



The horizontal distance from the center of the 3DR to the screw of ball on the carriage is 90 mm. Minus 23 mm reflector offset = 67 mm (the raidus of 3DR)

The optimal length of the diagonal rod would be: 134 mm



What do you think, is this correct ?? And what is the difference between optimal length of the rod and not optimal. I mean in my case, I have 150 mm rods and others have 153 mm but the calculation recommends 134 mm. So what? What is the impact on the print or calibration ? All I can see is the change of the angle...