This should be posted on the Controllers forum, this place is for the genuine Smoothie. And a real schematic should be given.by MKSA - Smoothie
Quoteklcjr89 QuoteMKSA BTW, I proposed this linear motor to tease you ! Have you seen and used them ? There is no way you could make them at home. They also run on an air cushion. In fact, it could be used but as an X Y moving table, you put the bed on it and just need a hotend moving just in Z. A good start, this one: Actually, the air cushion ones are a different model, the ball bearings onby MKSA - Delta Machines
To find a bed heater working @ 250° is certainly the simplest thing in this project.by MKSA - Mechanics
BTW, I proposed this linear motor to tease you ! Have you seen and used them ? There is no way you could make them at home. They also run on an air cushion. In fact, it could be used but as an X Y moving table, you put the bed on it and just need a hotend moving just in Z. A good start, this one:by MKSA - Delta Machines
What is the easier to make and keep square ? See also this: In doubt, go Delta !by MKSA - CoreXY Machines
QuoteDjDemonD If you can make a linear motor that would be awesome. But... Isn't the point to get rid of wires, if the forcer is still in the carriage then you'll have to run cables to it. Same system as used in the Tube and British RR No risk of a cow crossing so ?by MKSA - Delta Machines
An other potential cause, the pulleys used rather small and PU reinforced belt not as flexible as rubber. The Misumi doc rates the different belt regarding their char. Here we are interested in positioning accuracy and backlash: Fact is, the mod works, nobody question this. But fact is that it doens't prove these GT timing belts are intrinsically unsuitable because IF the cause are: poor belby MKSA - CoreXY Machines
Quoteklcjr89 QuoteDjDemonD Maybe there's a way to encode the position information onto the power lines like homeplug type systems. On the other hand maybe some wires to the motors isn't that much of a problem. Another way would be to have a PCB with four copper tracks on it, and make an adapter that plugs into the stepper's port that has spring loaded contact pogo pins. There would be one PCB peby MKSA - Delta Machines
QuoteDark Alchemist Quotethe_digital_dentist Toothed belts are simply floppy gears. In order to drive them you need a toothed drive pulley. The guy in the video may have fixed one problem, but he probably created others. For one thing, he's now driving the belt using just a couple teeth because of the goofy arrangement of the bearings that are pushing the belt against the drive pulley. Qualitby MKSA - CoreXY Machines
How about reading the Lisa 3D printer thread ?by MKSA - Delta Machines
Quoteorea Now, a cut stone slab, that should assure a flat plane (I'm only half kidding, a granite frame printer would be something) This is not kidding at all. I have suggested that and plan it for the bed (1cm thick 25by25). Easy to find in graveyard(just use the side without the lettering For the printer base, I looked to use a 40cm concrete slab but settled for a 4cm kitchen top, good enouby MKSA - CoreXY Machines
QuoteDark Alchemist All I know is that the driver can be toothed but the follower (idler) needs to be smooth on smooth and if you make the idler smooth on smooth the effect isn't halved it is completely gone. On the video, he changed both sides. Looks like standard timing belt, not GT2 GT2 profile is supposed to be better according to their doc . An other thing, bad pulleys tooth profile butby MKSA - CoreXY Machines
Easy to do, you don't even need and shouldn't heat it. Just press the steel ball with enough force. PTFE creeps under pressure. It is why it is not very good as is for bearings unless the load is very light. Here e=1mm should be enough. Done that in the past, for some bearings and valve gasket.by MKSA - Delta Machines
Quotethe_digital_dentist ... CA isn't flexible and not very strong in shear. As you tension the belt, the belt tries to stretch a little and produces shear force on the glue bond. I would not trust it. I think that contact cement, which remains flexible when cured, would be a better choice when gluing flexible parts, especially when they are subjected to tension. ...] Loctite sells a CA thaby MKSA - CoreXY Machines
QuoteDark Alchemist On a laser machine this was tested but remember a laser engraver is way finer in resolution than a 3d printer but with a toothed belt running on a smooth idler it results in a pattern that we call the curtain effect. Toothed belt into a toothed pulley was the same end result but when you flip the belt over where the smooth side of the belt comes in contact with the smooth idlby MKSA - CoreXY Machines
Quoteklcjr89 Having the XY on a mic-6 plate is much better than using V slot which isn’t great when you do the measurements on a surface plate. V slots where ? What measurement ? How rigid is your mic -6 plate with a big hole in the center ? Will it even still be flat when you have mounted everything ? How about completing your built to give a clear picture.by MKSA - CoreXY Machines
Quoteklcjr89 QuoteMKSA The way you use the ball screws, they are part of the structure, the frame. Can be seen in the rendering and you wrote it initially. If you "attach" them to a frame as advised, then we are back to a more classic approach, still with plenty of issues some described above. The printer needs an enclosure regardless, so it will have top and side plates. I think the print shoulby MKSA - CoreXY Machines
Quoteklcjr89 QuoteMKSA Of course they are unsuitable to be used as structural elements ( "frame") like in this proposal which condemns it. I wouldn't think of them as all that structural when the top and side plates go on to enclose the machine, other than to support the weight of the XY platform. Or were you referring to using the TR8 leadscrews as the frame and I misquoted you? The way you uby MKSA - CoreXY Machines
Quote691175002 .... As I mentioned before, using ballscrews as linear guides is discouraged, but the datasheets make it seem pretty plausible. Its entirely possible that screws might be smoother than the Chinese LMU parts. Quotethe_digital_dentist ... I would not try to use screws or guide rails as structural elements. .... Ball lead screws are perfectly suitable to be used as guides consiby MKSA - CoreXY Machines
This thread reminds me of this one:by MKSA - CoreXY Machines
Made as sturdy as this wood planer, it can work but what are the advantages compared to a box frame that can be closed to make an enclosure, is sturdier, can use lighter, cheaper parts, guides and lead screw ? Not to mention the moving gantry instead of the print bed. ? The box is the most rigid structure for a given weight.by MKSA - CoreXY Machines
Anyway, it takes a few minutes to identify the coils and wiring and it is easier to turn the plug around than to install the printer on the ceiling or a wall if it runs in the opposite direction or even change it in the firmware Easy to swap the pins on a keyed plug too. No wire cutting needed.by MKSA - General
Quoteo_lampe I thought of using grooved bearings for the idlers, which would work for circular cross-section too? I found a german manufacturer, who offers flat aramid rope too. E-module is 59 or 100, which is in the same ballpark as glass, so steel it is... They are woven and will stretch. One has to use // strands. I looked at that in the past. The other issue is to attach it to the belt. Itby MKSA - Delta Machines
I realized I was an heretic for deviating from the Reprap bible I just discovered ! I will be cooking in molten plastic for the eternity. There are people who tried to make an almost all printed parts printer: You should try to make one and give us your impression.by MKSA - General
You can sell it here:by MKSA - Delta Machines
BTW, did Melty the OP got his answer ?by MKSA - General
Gyroid ?, sounds like a tasty mushroom, looks like it is worth a try.by MKSA - General
Quotethe_digital_dentist The best place to get them is from the manufacturer of the linear guide. Linear guides aren't a random collection of parts. They are (supposed to be) engineered systems in which the shape and size of the races and the tolerances of fit between the races and balls are carefully controlled with precision grinding and careful selection of the balls. That's why linear guidby MKSA - Mechanics
Most probably when you restart, these bearings exhibit such friction that the motor skips steps. Even good quality polymer bearings are less tolerant to poor alignment than ball bearings. PLA must be even worse as the heat will make it stick even more increasing dramatically the initial friction.by MKSA - Prusa i3 and variants
Reread what I wrote.by MKSA - Prusa i3 and variants