What a misleading and unnecessarily aggressive title. If you get thrown off by something as trivial as a IP address, networking might not be for you. The duet's network is, if anything, superior to the competition.by orea - General
Thanks for (planning to) sharing, looks clean and efficient. I will slowly be building a semi-large CoreXY with 2x 750mm linear rails for Z axis, and this should come in very handy.by orea - CoreXY Machines
As far as I understand the cut aluminium plate as X/Y frame is mainly to keep YY symmetrical and angled, as that's the direction of the plates rigidity. The thickness to surface ratio I've seen till now look like they would twist in the Z direction. Now, a cut stone slab, that should assure a flat plane (I'm only half kidding, a granite frame printer would be something)by orea - CoreXY Machines
Thanks for the link, good information. I'll make a sum of it and round up a bit. With some luck it should be possible to find a fairly silence supply once the bed is out of the equation. Will post back with readings when it's some day done building.by orea - Safety & Best Practices
I plan to build a larger (400x400x600 or so) coreXY and will have the bed as AC as it makes sense for large formats. How much of a PSU should I count for the remaining electronics if using 24v? I'm a bit restrained by budget so would like to avoid the beefiest versions while keeping with safe brands. I have a nice 12V HP server PSU, but am under the impression 24V would be better for fast motiby orea - Safety & Best Practices
Looks interesting, maybe consider a frame with linear rails for stability.by orea - CoreXY Machines
Thanks for your comments Origamib and 691175002 , I sort of suspected it would be that, especially the gravity being static. I'll try as slim as 9mm (quite lighter than 12mm) over 450mm span and see what it gives. Hoping to reduce print head weight as much as possible. Will post results if anything noticeable.by orea - Mechanics
Mainly because the heavier the moving gantry is, the bulkier everything else has to be, and living in a small flat with limited tools I prefer targeting weight reduction. I already have a heavy direct drive machine in the shape of an evolving FT5, this new one's focus is to be light and fast. Even when building a tank it is good to know where the energy goes in order to optimise.by orea - Mechanics
I'm modifying a CoreXY kit and will use a single linear rail as X axis. I hope to print rather fast as the build volume is large. Should the rail be on it's edge "vertical" to give more stiffness against gravity, or horizontal to take the shock during corner jerk? The acceleration is probably not so much, but the hard stop before turning worries me more. Gravity has the benefit of being static.by orea - Mechanics
@deckingman Your CoreXY has separate extruder and hot end, isn't that to reduce weight from the print head?by orea - Mechanics
Not the better slicer, but an ok alternative, does custom support placement, have a nice preview, a few points ideaMaker is free and little known:by orea - General
I have one and am very satisfied with it, even the melanine and mk8 extruder / hotend are perfectly functional. It is stable, fairly silent, runs fast. I just upgraded the printhead to a titan geared extruder + volcano 0.8mm hotend and can get big parts out real quick. While not perfect, it is very nice for the price, even considering shipping and EU import taxes.by orea - General
QuoteTheJones That's not bad, looks pretty solid. But I don't really want to pay $50 to attach. I was actually thinking of doing something similar. It's not hard to "machine" aluminum in a drill press. Heck, you can probably even do it with a cordless drill if you're careful and patient. I think what I am actually going to end up doing will be a $0 solutions using parts of the old hotends. I'llby orea - General
So mysterious digital ghost.. Some million to sneak out of Nigeria maybe?by orea - General
As you asked "CoreXY machine with aluminium MGN12 rails rather than steel smooth rods? WHY????" I replied as to why use MGN12+support rather than dual smooth rods. As for alu VS steel, OP didn't say anything about his MGN12 being aluminium, AFAIK they are all steel (a quick search gave your post as first result ) Anyhow, OP can chime in on this..by orea - General
@DragonFire You'd need a very thick smooth rod to make a large machine. Alu extrusions are light and load bearing enough and a MGN12 allows for a single rail in stead of dual smooth rod for X axis. Pretty much all larger printers use Aluminium support + MGN12 for that reason.. AFAIK. edit: While one could use giant smooth rods, prints would take a long time for a large printer, hence the use ofby orea - General
I have bridged CFG1 and GNG, as well as removed the configuration pins going to the motherboard. It is now in theory in speadcycle mode, I can confirm the microstepping on the print surface, and it is a bit more noisy. It misses a lot of steps though, in both X and Y, which is strange as the voltages where first the same as when X (single motor) didn't skip in stealth chop mode. Higher voltagesby orea - Stepper Motors, Servo Motors, DC Motors
Hi Wurstnase , thank you for the info. My TMC2100 MKS seem to have two points joined in the bottom left corner, where as the same on your photo is open. It seems it is just "En/CFG6" though, so CFG1 to GND is indeed open.. I will try joining CFG1 to GND using the "little wire between the pins" method Thomas Sanladerer here: I had hoped MKS version could be configured with MKS jumpers, but appaby orea - Stepper Motors, Servo Motors, DC Motors
@dc42 They don't get hot, but then it didn't run particularly fast either, with 60mm/s print speed and 150mm/s motion. Thanks for the mention about the Apmerage, I will check. @MrBaz Yes 24V would have been nice, it is planned for my next years "great custom corexy". I'll try to avoir sinking too much money in the FT-5 in the meantime, so at worse it will do with the old A4988 drivers. For the 0by orea - Stepper Motors, Servo Motors, DC Motors
Thank you for the reply, the Y steppers are in fact in series (I got it wrong), the Z steppers that are in parallel (they work fine enough without micro stepping) As for specs they are NEMA 17 1.8 degrees, 5Kg/cm, 1.5A. The original stepper drivers are Pololu A4988, I tried voltages +/-30% what worked originally (I don't know the calculation, but that worked for X and extruder). Hence the only thby orea - Stepper Motors, Servo Motors, DC Motors
In the cheap domain there are a few interesting vertical Z on aliexpress, for instance corexy: (there is also one a bit more expensive with linear rails) or ultimaker gantry: While these probably aren't the greatest, they have a large build volume, don't have the messy format of a moving bed, and being 20x20 extrusion based easy to mod.by orea - General
Hi In an attempt to get smoother surfaces and less noise from my Folgertech FT-5 (MKS Gen 1.4, Cartesian with two steppers for Y axis) I have replaced the stepper controllers with TMC2100. This take the 1:16 from the MKS and make it 1:256 in "spread cycle" mode, which was was very nice for a few minutes, until the Y axis started skipping. I have tried changing the voltage from 0.9v to 1.5v, withby orea - Stepper Motors, Servo Motors, DC Motors
The "piezo inchworm" look great, though I don't even dare to check the price. Maybe one could look at traditional linear motors, but they might not be steppers? Also: could linear rails replace smooth rods for the Z axis? I suppose the carrige might have a bit more angle / cantilever play than the larger round bearings though.by orea - CoreXY Machines
It will be a low cost PLA machine for my brothers art, so then long Y axis it is. The bed will be something like 20x40 or even 15x50, so probably two beams are better for support of the long side. Will probably use v-slot rollers on Y to keep price down, and reused smooth-rods for X. Speed and cost are higher priority than precision, the (finished) pieces he want to make will be 1-2m large Thankby orea - CoreXY Machines
Sounds good, it's been a classic issue. Will definitely consider when building a serious machine next year. edit: @DjDemonD : Yes having a gear to have some more torque is probably good if driving several shafts.by orea - CoreXY Machines
By the way of Z axis, one of the issues with two motors for two lead screws is the sync. One motor coupled to 2-3 leadscrews could sound weak (I could be wrong) Could it help to link the 2 motors + leadscrews with a belt? This way the motors steps might have better chance to stay in sync. Just thinking loud..by orea - CoreXY Machines
Thanks for chiming in, indeed, they options possibly outweight each other.. The carriage will be light (bowden for some speed) but even that factor don't help decide, as the benefits and inconveniences remain. hmm.by orea - CoreXY Machines
On a CoreXY with a build surface around 20x40cm, would it be best having the X-axis the on the long or the short side? On the short side there will be the two Y beams to support shake and X would be rigid from being short. Most of the motion will be done in the Y direction though, so there might be a point in not lugging along the whole X axis as much? (rather having the carriage sip along the laby orea - CoreXY Machines