Rat Rig Community [Unofficial]

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Help with first layer - vcore 4 hybrid 500 new build

I cannot get my frist layer no matter what I try. I think the nozzle is to close to the bed. Did the beacon calibrate about 20 times. Am I missing something?
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How can I reduce effects on the corners

I’m convinced this is something related to speed because this is a non issue when I am running low velocity and low acceleration but at higher velocities and acceleration it creeps up
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Preheat Toolhead before Toolchange

I am able to set a standby temperature in the ratos config of the vcore 4 idex, but is there no way to make the toolhead preheat the nozzle before it needs to be used? I always have to wait 15-30sec before the printer is ready to print again. If I use the "ooze prevention" function in orca slicer the toolhead is correctly preheated, but I have to wait till the not used toolhead to reach the standby temperature. I imagine it would be a quite easy implementation in ratos to set variable preheat parameter. If anyone got a soluton for that I would be very thankful 🙂...

Weird (PA?) artefacts on an arc movement. VC4 500IDEX

ASA print with 0.6 hardened nozzle. One long side is straight and has no problems, the other has very slight radius and I could even hear how toolhead is slowing down. PA 0.04, max speed 120mm/s. acc 2k...
Solution:
Found, arachne was to blame, PS 2.9.0. Switched to classic and problem is gone

ABS bad layer stacking and overhangs

I’m having some issues with ABS and not sure where to begin. The corners looks aweful but overhangs above look okay, probably the corners warped a little bit during print but don’t think that’s the whole truth. I’m also not very happy with how the layers are stacking , if you zoom the pictures you can see the layers is not consistent. You can see some ”ghosting”. I’ve shapers set correctly and pretty clean graphs I’m thinking if it could be extrusion temp? ...
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portions of vertically printed cylinder print not smooth

When I print a vertical cylinder, the front and back sides of the cylinder (what you would see if you looked at it from the front or back of the printer) are perfectly smooth. But if you viewed the cylinder from either side of the printer the sides have a very slight wave to them. So sides when the toolhead is running mostly in the Y direction are not smooth and sides where the toolhead is running mostly in the X direction are perfect. It's an idex machine and this happens with either toolhead....

Line in the middle of every print?

I'm sure i saw a post regarding this problem in the past.... I'm using cura as my slicer. Every print i do I have a distinct line kind of in the middle of the print. It is especially evident when making lithopanes. Does anyone know if there's a setting in cura that needs changing ? If I can figure out how to attach a pic I will
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Generally great print quality except this curve?

I redone my belts with the GATS system tensioning my belts equally across all 4 of them to approximately 4kg, and made the belts equal size. The belt tension feel's lower than I'd of done it to manually. Whilst doing this I re-squared my gantry too which has improved my VAOC results. Overall my machine moves as smooth as it ever has but.. I'm getting this bumpy, wavy wall on what should be a smooth curve though? Any help greatly appreciated...
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Model size not matching the print

Hello, I have been calibrating my printer after rebuild and ran in to issue, that when I place model (80x10x4mm beam) on the bed in either X or Y direction, it prints pretty fine, the dimensions are 79,8, 9,95 and 4,05mm. But when i place them 45 degrees to one side, the print is 80,5mm long and to the other side its 79,5mm long. I generally think its a belt tension problem, but any advice will be greatly appreciated....

Weird blobs and gaps in print?

I’m using a new roll of petg filament to print a large 990g, 12 hour print on my vcore 4 idex and it’s having an issue printing with these bits sticking out on the walls. There is no seem anywhere on that face and it does it all around the print. I tried to reprint with slightly lower temp, 250c and it’s still basically the same. I’ve done many smaller prints without this issue? My guess is the stock spool holder has to much drag and when it’s being pulled it skips a bit? But I guess that wouldn...
Solution:
i get artifacts like that if the spool isn't dry. Try drying it out and print again
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Core v4 raspberry pi USB shorted out

I'm in need of a support person to figure out what I have done wrong with the build on this core V4 build. Everything was fine to begin with on the first power on everything was lighting up correctly but the raspberry pi just kept blinking red and wouldn't blink green or hold the green LED. I unplugged the printer and pulled the SD card and reimagined it and tried again but this time the red light flicked red once and turned off it then started emitting smoke from the usb that the big tree tech...
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IDEX offset of T1 on the far side from VAOC

My issue is the prints coming out of my T1 is a kind of rotated regarding the prints from T0. Close to VAOC they're perfectly fine, but on the other side of the bed there is half a millimeter offset. What I did: - Checked the rear plates with the motors (unscrewed and screwed again, to be sure they're flush to the profile). - Adjusted the anchoring of the belts to the heads in order to make the front tensioners extend the same amount. It should make the length of both belts pretty much equal. - Shaper graphs are good. Very low vibration percentage (under 2 for all). Y belt above 5700 MZV, X belts over 7500. - The frame is quite well assembled. I've measured all diagonals and they have way less then 1 mm difference. ...
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Make box align

Trying to get the two parts of the lid to align. But seems I am printing something wrong. In both sides the parts that are trying to align are the upper part of the print. Printer in ASA, so my guess is some kind of shrinkage issue?...
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Sharp corners on small part being rounded

Part on left is from Ender 6 with default settings (80mm/s). Part on right is from VCore 400mm RatRig slowed down to 40mm/s. I've usually been printing at 250mm/s with the RatRig but I slowed it way way down trying to get rid of the rounding to no avail. I did the automatic input shaper calibration a while ago, but I will do it again if that would help. I believe the belts are the correct tightness, but I am open to opinions there as well. I've also attached an image of the settings from Cura (Ender 6) and Prusa (RatRig). Any suggestions would be great. Thanks!...
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Zits on travel moves (I think)

noticed that my ASA print has these zits on the outer walls where I think travel moves occur, since they're all pretty random aswell. There's no extra extrusion, more like a pinhole. I have "avoid crossing walls" enabled in my OrcaSlicer, but it seems to still cross them anyway if I look at it this way. Retraction settings included
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Layer pattern

Hey guys, Does anyone of you know where this weird pattern comes from and how to avoid it?...
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ESUN ePAHT-CF bridging issues

I'm able to print just fine but bridging is a pain with eSUN ePAHT-CF. Even overhangs are fine without any fan at all but this bridge in the photo below was printed with 25% fan, it didn't help much at all. I'm using a 0.5 TC nozzle, filament is properly dried for days @70°C and then three hours @90°C right before printing. I tried 30mm/s bridging speed, 60mm/s bridging speed (the filament profile is limited to 10mm³ anyway) but nothing helps. Even though it's just a single 5015 fan for cooling, I don't feel comfortable ramping it up to 50% for a PA-CF filament, although that is what I'm going to do now....
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Abrupt Z offset when printing in different C direction

I am printing a different material than plastic, but I think the problem can be applied generally. As you can see in the image, the print immediately stops after the curve when printing in opposite x direction. The sample lies in the corner at the zero point of a ratrig core 3.1 Do you know what could be the issue? I was thinking if it was a bed mesh issue than the print would gradually stop, and not immediately after the curve....
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Layershifting

Thanks a lot again everyone for helping out, i think i might be close to getting it sorted now, after fixing the calibrations and offsets, pa and flow cal, this is what it did overnight, i did print some layers at the bottom properly, but then did this zigzag. The central layers also did not get stuck to the support underneath them. What am i doing that is causing this issues....
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Vfa

Any suggestions are very welcome. This is ambrosia glitter Asa.
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