Wavy surface problem.
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@luke-slaboratory said in Wavy surface problem.:
Suprisingly, yes!
I forget what the numbers were for feeds+speeds, but it made a considerable improvment for $12
Holy cow! What a difference!
I already have installed an accelerometer, just waiting for the montion planner overhaul with imput shaping in reprapfirmware...
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@luke-slaboratory So is that improvement from adding the extra mass to the printer?
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Yessir! Both pictures were me trying to find the worst light where I was, but I fully admit that they're not 1:1 comparative since they weren't taken in the same spot.
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@luke-slaboratory That's interesting though. Complex things these printers!
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@tpra Hello. That print result is excellent ! Can you show me a photo how your printer is constructed?
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@egon-net said in Wavy surface problem.:
@tpra said in Wavy surface problem.:
@egon-net same quality at low speed. even better actually.
if i don't go faster with rrf it's because it produces too much ghosting but that's another story
anyway klipper produces the same quality from 40 to 130.Can you test Klipper without input shaper? I wonder how much of the quality increase is beacuse of it...
I am very curious to see this as well!
Input shaper benefits are pretty well established at this point, and I am anxiously awaiting the feature to roll out for RRF (hopefully supporting my Maestro board). But, I have had a suspicion that something in RRF is driving the steppers in a way that sets up a resonance.
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@hiroaki said in Wavy surface problem.:
@tpra Hello. That print result is excellent ! Can you show me a photo how your printer is constructed?
Hello, nothing crazy, it's a simple cartesian.
You can find pictures here : https://forum.duet3d.com/topic/21792/my-latest-duet-cartesian-printer
The Z drive has been completly modified since the pictures so it's closer to the one i designed on the funX4. Imho the printer would benefit a lot stronger and heavier frame. That"s why the next one will be a mix of the FunX4 Z and frame + RatRig's vcore3 XY carriage / EVA extruder holder.@ccs86 said in Wavy surface problem.:
I am very curious to see this as well!
Input shaper benefits are pretty well established at this point, and I am anxiously awaiting the feature to roll out for RRF (hopefully supporting my Maestro board). But, I have had a suspicion that something in RRF is driving the steppers in a way that sets up a resonance.
Sorry it took time, i'm printing a no-input-shaper test with the exact same gcode used on the right picture of my comparison, will post results when i'm back at noon.
Tbh i don't think it has anything to do with input shaper. I also have the exact same suspicion as you about "something in RRF is driving the steppers in a way that sets up a resonance".You know what makes me crazy with this ? the problem exists, and it's ignored. I don't even understand that seeing the comparison i posted above, no dev wondered or even asked me more informations.
I mean, it's not like if a guy who just got its first printer said "it's it does not work why???".
I thought the print quality spoke for itself. Clearly not. So why bother ? -
I don't think it's a case of dev's ignoring an issue, so much as it is a slippery issue, which can be impacted/created by a multitude of variables, that nobody has truly nailed down to an actual issue within RRF.
I think you are in the best position ever to truly shine light on this, while ruling out any mechanical issues. An identical print, on the same machine & electronics, between RRF and Klipper (sans input shaper), should really get us closer to the core.
This is a thread I posted with similar complaints (periodic XY deviation). I never really found a solution, so much as I found ways to mitigate the issue (very high resolution STLs, very small gcode line segments, slower print speed). https://forum.duet3d.com/topic/21825/duet-maestro-struggling-to-produce-smooth-curves/33
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@ccs86 said in Wavy surface problem.:
Klipper
That's my plan for 2 weeks from now - I have a fast corexy that runs klipper on mini5+, and i'll be flopping between klipper and RRF to watch how it changes
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@Luke-sLaboratory I gotta ask, sorry for replying to last year, but i face this problem. Can i ask if you use 2209 stepper drivers/interpolation with your steppers? Or are these stock?
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@Duckers Oh wow, been a long while!
I never got around to this experiment - its gotten to the point where I've switched from a duet mini5+ on klipper to a duet 6hc on klipper - the mini5+ used 2209's, and didn't really notice any changes between the mini and the 6hc, other than speed!
I don't use interpolation on either - experiments with encoders revealed small issues with positioning while using interpolation, but these are also very small!
