diagonal rod correction ?

punkti

Howdy

i am looking for an explanation of the delta diagonal rod correction? what does it do, how to measure that?
i just printed that http://www.thingiverse.com/thing:745523/#instructions and see some differences in the 3 axis, but how to go on now? is there some documentation about that?

Repetier

<font face="Arial, Verdana">There is no documentation about how to correct it. I have no idea how to determine this by tests except manually measuring the rods. But these should normally be of equal size. Especially 2 paired rods must have the exact same length for your extruder will tilt while moving and that is non-correctable error.</font>

What it does is changing the rod length in the delta movement formula.

If you have a z probe we give some infos here:

<font face="Arial, Verdana">http://www.repetier.com/documentation/repetier-firmware/z-probing/</span></font><br/></div><div><br/></div><div><br/></div>

punkti

ok, so it is correcting the physikal length of the rods (and is not calculating in percentage of the "standrad- length or something like this)...

so i have to do it by trail and error ;)

in the end, i have a size difference in x and y direction, thats what i want to get rid off...

Repetier

Could also be a angle problem of the columns or position of carriages are not horizontally after homing. Problem is that there are sooo many parameter influencing shape and z position over xy. Most users are happy when z stays constant over the bed range.

punkti

with z i hav no problems , the xy dimension is also in a range i could live with, but its not "perfect".
i try to tweek the rod lengths, maybe it helps... ;)