is this a cooling issue?

Vc400 hybrid. Printing benders head but it's ugly.
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19 Replies
chicken
chicken•2w ago
need more details about the print. Type of filament, etc. At a quick look it looks like under extrusion or wet filament.
Belly
Belly•2w ago
Brand new pla spool polymaker. Prints fine on my ender.
chicken
chicken•2w ago
Then I would check on making sure your extrusion multiplier is right. It seems like there are gaps in the print and that could be because you are under extruding
Belly
Belly•2w ago
Yeah I guess I'll do the steps, pa, all that jazz. Was hoping the included setting would be close enough. Could it be a temp issue, like it's to cold to be printing this fast and another 10c would fix it? I've never been able to go above like 80mm before.
chicken
chicken•2w ago
Every filament is different so you need to walk through all the steps unfortunately
Belly
Belly•2w ago
Did all the checks and everything is spot in. Steps, pa, em. So some playing around. Vase mode. Left is ran at 105mm/s none stop, right is 60mm/s. Seems layertime, temp, cooling issue. I did burn the 12v out of my m8p using the included 12v 4028 fan and I replaced it with a cheap Amazon 24v that doesn't blow even half has hard as the 12v did for the 3 seconds my board tried to tough it out for, so leaning to cooling. I have a comparable flow spec wise 24v 4028 coming tmrw with my bed fans so hopefully that's all it is.
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TheTik
TheTik•2w ago
It isn't just flow, it's static pressure. Lotta people here who know more will strongly recommend the supplied fan.
Belly
Belly•2w ago
This is the new new fan that arrived today. cfm is within is a few percent. Pressure wise its close. not the 4.5in but 3.0. Its the closest I can get to the supplied fan that isn't $84. It blows very hard compared to the amazon one I took off. https://www.digikey.com/en/products/detail/orion-fans/OD4028-24HBXE/16636974 I just cant run 12v now, that output died. I mean I guess I could drop a 12v supply in where the pi goes. Either way they are both damn loud. What are the thoughts about cpaping it?
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Belly
Belly•2w ago
Ok someone's got to explain this. Pulled filament from other printer that was printing it perfectly as she does, new roll, printed from active drier so I know the filament is fine. Temp tower failed first time at 215 so went 240-220. 240 looks good. Then did EM and right at 0 is perfect. Pressure advance falls apart tho? Or I just pick the least worst spot? So thinking maybe I was outflowing since it was at 18.6mm^3/s, ripping at 250mm/s on the straights, yet it passes the flow test at over 22mm^3/s. Can see the temperature color transition nicely matching the spools filament at about 13-14. So what am I to think here guys? Or what's my next test? Slow down my pa test and try again at like 14 15mm max flow?
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Belly
Belly•2w ago
Reduced max flow to 14 and sent it again. Better. Turned it 180deg for the second one here to just see how that effect it but not much difference
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dfos
dfos•6d ago
@Belly I'm having exactly the same issue. Have you had any luck debugging this? I ran max flowrate, no issues up to 30
Belly
Belly•5d ago
Yeah same thing here. It runs the max flow rate just fine but prints parts like garbage. I reduced max flow to 10 and it will print at that slow rate just fine. I suspect some sort of extruder error. Like it can't keep up with quick lines of code but flow rate it can do cause it's not alot of code to process. Either it way it pisses me off to have dropped now over 2500 on a machine that can't outrun my ender 3.
dfos
dfos•5d ago
Well, EBB42 + Orbiter V2 is a proven design... I don't think this is an hardware issue
Belly
Belly•5d ago
I'm curious if going to can would change anything
dfos
dfos•5d ago
Oh, and btw, I have also tried lowering microsteps to 16 (default is 64) and it didn't solve it What slicer are you using by the way? and version
Belly
Belly•5d ago
tried orce 2.1 and 2.2 beta, also prusa 2.8 orca*
dfos
dfos•4d ago
Hey man, I was just organizing my 3d printing material, when I opened my 2nd Rapido 2 hotend, and what have I found out? That it comes with a Hardened Steel 0.6mm Nozzle by default in the UHF adapter and a 2nd steel 0.4mm in a plastic bag. I just thought they were both 0.4... Make sure yours is also a 0.4mm I will switch and re print Update: prints are flawless now
Belly
Belly•3d ago
Wait? I swear the nozzle I put in it said 0.4...... as I'm looking at this on tho now I'm second guessing myself. Weird as I've managed to get somewhat respectable prints from it. Now what can I do if I set it up right? Let these parts finish then I'll look. I hope it's just me being an idiot🤞
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Belly
Belly•3d ago
Couldn't take it. Stopped the print. Yup 0.6mm. Idiot. Hey Thanks for that. Lol I just ordered a diamondback for it in 0.6mm so would have fixed it on accident tmrw. Excited to try it the right way now.
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