In general, I don’t want to and won’t talk specifically about the Kobra.
Problems can always arise with bed slingers. So let us go thure this points:
Preface:
Bed Slingers is a different class with different problems. As a side note, Anycube also once manufactured a bed slinger that I owned, which only had one motor on the Z axis. Of course, you could set up the clearance gaps so that no problems arose, but it did require a bit of sensitivity, which very few people have. So the weight is therefore less stable in height and is not as firmly connected to the base plate as with a CoreXY.
Phrozen Arco an coreXY (which also has massive delays) keeps the weight down and raises the print head as the part grows, contrary to all others that lower the plate. This can have huge benefits as you want the mass to be as low as possible - just like a wrestler tries to keep his mass as deep as possible when defending. Think of it this way: it takes more force to spin a rock flat on the ground than to throw it off a pole.
The Magneto X makes the greatest length over the most massive guide - the shorter guide axis only carries the print head.
So let’s get to the point:
I prefer solid guides - not plastic wheels, which often have to be adjusted very precisely because of their wear. Above all, the big Bed slingers then have massive wear and tear on the plastic wheels. In addition, they move the part with the greatest weight. The part that you actually only want to move minimally.
I want belts that have to move as little mass as possible and are as wide as possible. And best of all would by, no straps at all. Belt = Adaptation to temperature, self-relaxation, aging and so on.
I would like to have solid Z-guides, the larger the diameter, the less wear there is because the contact surfaces are larger. Guide rails are generally on Z,X and Y, i like to see as massiv as general (But it led to problems with the QIDI I-Fasst at different camber temperatures and it hasn’t had autocalibration)
I want as little mass as possible on the printers top. But if there is, we want it to be massively supported to the printer base. With a CoreXY I really don’t see any problems with putting an AMS on it.
@JJTechPrints
His mistake wasn’t that he didn’t buy a Bambulab, his mistake was that he bought a Bedslinger. But I think that he will experience the disadvantages better with the printer than with a printer that is difficult to access to identify the problem to grow from it.
Of course, bed slingers can also have advantages, everyone has to decide that based on their application. A Bedslinger can really the better choice for beginners.
So I wouldn’t say that he made a mistake at all, he is now making the experience and will incorporate it into his future purchasing decisions.
But I don’t want to say that you’re wrong - too many cooks spoil the broth. The moste important thing is that you follow your line and don’t get distracted in different directions.
You’re right too!
