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Delta arm blues?
Posted: Thu May 09, 2013 7:14 pm
by jesse
I ordered a replacement set of arms from SeeMeCNC. The joints were all 8 mm +/- .1 mm wide.
My arms were 8 mm +/- .25 mm wide
The
z-calibration piece still didn't come out any better.
[img]http://i.imgur.com/tcS3C6x.jpg[/img]
Sliced with Kisslicer, .3 mm layer thickness, 2 walls, PLA from justpla.com.
Re: Delta arm blues?
Posted: Thu May 09, 2013 8:17 pm
by Jimustanguitar
You've replaced the arms... How do the U-Joints move in the brackets on the bearing carriages and on the hotend mount? If you have a mechanical issue, they're the next pieces to take a look at. I'm hoping that the seemecnc guys will start machining and selling those next. I'm also assuming that you deburred the bearing idlers, checked the pulley set-screws, checked belt tension, and have smooth cheapskate bearing movement without any slop? Also check that the 3 hotend mounting setscrews are tight and that the big hotend nut hasn't loosened itself. Do you have a burr in the aluminum t-slot that is causing a "bump" in the bearing travel?
How did the new arms' fitment feel to you compared to the ones you took off? I've been thinking about ordering a set for myself, now that they're factory toleranced. Heck, they're cheap enough
Re: Delta arm blues?
Posted: Sat May 11, 2013 7:18 pm
by jesse
I dropped the speed in KISSlicer to 1,1,1 and that helped. Probably some issue with inertia.
Re: Delta arm blues?
Posted: Sat May 11, 2013 7:41 pm
by foshon
jesse wrote:I dropped the speed in KISSlicer to 1,1,1 and that helped. Probably some issue with inertia.
Depending on what firmware you are using you may see a gain in lowering the jerk and/or accel settings.