War-El
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
Yeah that was listed as theoretical, not practical at all 😄
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
Regarding other points I read on the neatly written site (appreciate the systematic work 🙂 ) than getting as similar μm/mK to 440C for gantry materials:
1) As for fans - side blower appears to make the most sense, maybe with some optimised airflow that would make the air spiral around the heat sink before leaving out the side?
2) As for the point that active heating/cooling the gantry probably won't help - I don't think you need to give/take heat. Anything that would help increase the thermal conductivity and redistribute the heat more evenly might help.
a) One way could be a blower that would help distribute the heat
b) Other way would be a material that would fit the requirement for similar expansion but would have better conductivity - in that regard one of my tables (local to Czech sorry 😄 ) says that Red Bronze is supposed to have 11,3 coef. of exp. (the rail is 440C at 10,1)
c) Also inlaying some conductive material into the extrusion slot to bridge the gap might help as well (i.e. squish a copper tube in there) because the air in the extrusion slot acts as insulator between the front bottom and front upper "fin" (for lack of better term)
d) And finally the gantry shape might help - if it was a "square tube" there would be a lot more up-down convection going on in there, that would help reduce the bottom to top thermal gradient again. (This part actually makes the most sense to start with, if you want to make the gantry out of different metal to be as simillar to the rail as possible). And side note - the square tube shape would allow you to run a fan through the axis of the tube to facilitate heat distribution -> a).
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
(in Europe you are more likely to get 1.4021 that is supposed to have 10,3 expansion, but I am afraid thats going to come as square/round stock only https://www.aalco.co.uk/datasheets/Stainless-Steel-14021-420-Bar_311.ashx)
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
And i.e. SS410 which is quite more common stainless steel has 9,9 (440C is supposed to have 10,1) which is darn close and could save you some money!
https://www.hpmetals.com/-/media/ametekhpmetals/files/technical-data/stainless-steel/ss%20410.pdf
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
Thx for pointing me there, reading the article on notion
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
Regarding this research here - I read posts from October and I admire your resolve here!
Is there any recent summary I could use to catch up?
2089 replies
RRCRat Rig Community [Unofficial]
•Created by tg73 on 10/8/2024 in #fix-my-print
Regular surface distortion pattern towards end of larger first layers VC4
Hey there,
we bought a VC4 500 into our company and observed simillar issues
Printed loads of ASA parts, 95° bed 270° on 0,6 nozzle, 0,3 layers (closed chamber heats to around 55° -we use the reading on inactive IDEX toolboard)
With 60 min. heat soak there was like 0.1 - 0.13 z-offset adjustment needed during the first layer (the squish as guys mention here)
With 100 min. soak it was quite less at 0.05-0.06
Btw one of the steps we did was heating it up for a few hours and loosening almost all the screws of the X rail except those in the center and then tightening from the center outwards and that also helped to reduce the bow in preheated status.
2089 replies
RRCRat Rig Community [Unofficial]
•Created by Fabiolous on 2/14/2025 in #fix-my-print
Z shift - gap on layers after M600 filament color change (VC4 500)
Hello there,
got the same issue.
And we run a really long preheat and it happens even after severl hours of printing when the temperature is already stabilized.
We are running 0,3 layers and 0,6 nozzle.
The shift is constantly 0.1 - we solve it by running +33% flow (exactly 0,3/0,1) until the nozzle reaches the same point in next layer, but this is a hotfox i dont like.
Found any permanent solutions?
13 replies
RRCRat Rig Community [Unofficial]
•Created by ShadowViper on 10/22/2024 in #fix-my-printer
Nozzle gets closer to the bed every time during first layer (worse at higher temps).
Same issue on VC4-500
Any solution for the Beacon already?
9 replies
RRCRat Rig Community [Unofficial]
•Created by Kotaa on 2/19/2025 in #fix-my-printer
bed mesh and first layer issues
What temperature is the mesh taken at? And enclosed or open? Could be the gantry warping by temp.
7 replies