So using the Delta Calculator I got the printer going.

3D Printing
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1

So using the Delta Calculator I got the printer going. For the last couple of days been trying to get prints accurate. I was using this formula:

" Here is my sample openscad object:

cube([100,2,2]));

If the length of the object is wrong, adjust DELTA_DIAGONAL_ROD:

new DELTA_DIAGONAL_ROD =
100 / measured_length * original DELTA_DIAGONAL_ROD"
(from the Minow blog)

When I used that formula and put in my new DDrod length my prints got shorter. So to fix this I shorten the rod length instead and it worked. My 100mm long stick now prints at 99.95mm. I might knock it down a little more to see if I can get it closer. First I’m going to do a cube or 2 in diff. locations and see what that does. Hopefully it won’t result in a broken window and trashed printer in the parking-lot.

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I always thought DELTA_DIAGONAL_ROD was supposed to be adjusted if you were getting bowled or domed prints, and that it was used to adjust the ‘flatness’ of your travel across the bed.

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The delta radius adjusts flatness. The diagonal rod length corrects xy error

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I guess I should of posted the link to the blog: http://www.minow.blogspot.com/

Has anyone else used this formula and found it to be backwards? Instead of using the answer, 160.77, I would use 159.23. Maybe it’s a miss print or something.

5

@ekaggrat_singh_kalsi thanks for the correction; it’s been so long since I’ve actually had to tune a Delta.

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@djC653 I agree mine came out the same way as you. Although I also get different measurements for X and Y so I also have something else wrong.

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@Chris_Brent unequal x and y is due to unequal rod lengths. Remeasure the rods and try to get them equal