Re: Jeremy's ORD Bot Build
Posted: Mon Mar 26, 2012 12:52 pm
I did end up finding good springs. I had some that came out of an old royal portable typewriter. They're about 4mm ID, and 16mm long.
I was looking through a lot of the test prints I've done when I noticed an odd pattern. On larger objects, the wobble was smaller, almost gone. It was much more defined in smaller objects. Also, objects printed at a higher speed had a more pronounced wobble. Hm. So I started looking for a cause that would be time-based. I started where the vast majority of printer problems stem from -- the extruder. And what I found was that I have +/- 5c swings in temperature, oscillating regularly. Tonight I'm going to properly tune my PID controls, and see if that helps at all. I do know that prints are very thermally sensitive, especially at fine resolution and high speed. So this might just be the key.
I was looking through a lot of the test prints I've done when I noticed an odd pattern. On larger objects, the wobble was smaller, almost gone. It was much more defined in smaller objects. Also, objects printed at a higher speed had a more pronounced wobble. Hm. So I started looking for a cause that would be time-based. I started where the vast majority of printer problems stem from -- the extruder. And what I found was that I have +/- 5c swings in temperature, oscillating regularly. Tonight I'm going to properly tune my PID controls, and see if that helps at all. I do know that prints are very thermally sensitive, especially at fine resolution and high speed. So this might just be the key.