Quotedc42 The Duet can generate more than 100K steps/second per motor ok... i'm just getting used to the different terminology from the Marlin - above you mention running at 20,000mm/min when i'm used to mm/sec... dividing by 60 comes to 333mm/sec which is what i was previously running at on a Rumba v1.2g and i was getting "zagging" during the faster acceleration points, i could only set a maxby lkcl - Ormerod
Quotedc42 Reducing microstepping DOES NOT increase motor torque. The torque per microstep does indeed reduce as you increase microstepping, but the torque per unit of angular error does not change. So reducing microstepping will not solve your problem. The only reason to reduce microstepping is if you need such high speeds that the electronics can't generate the steps fast enough. The Duet can gby lkcl - Ormerod
Quoteivo95 Something like this: aw yeah, that'd be awesome! yeah that wouldn't move at aaall you could use the L-bit to mount the printbed forward extrusion, use those right-angle corner brackets to mount them if you used the 80mm L. Quote Or maybe 80x80x3mm (cut to 80x30) with 2 LM10UU per side in printed housing to reduce weight... yeah 80mm depth sounds more paranoid. i have a 75mm struby lkcl - CoreXY Machines
hi, i just wanted to let people know that i've managed to get a successful first print - at rather "cute" speeds well below what i have been operating at with arduino-based boards - and it came out beautifully. the sandwich200 is a standard corexy design currently with a geared 53:13 bowden using 3mm filament, with a split box for transportation purposes that joins together at the bottom and theby lkcl - Duet
QuoteMutley3D lkcl - Not quite sure in my minds eye what you are describing regarding the 6mm hole, however it doesnt sound like anything overly difficult to cater for if it isnt already. As for quick release mounting, this shouldnt be too difficult either. The mounting arrangement would lend itself to a baseplate that the extruder assembly is bolted to, and then the baseplate can have the requisby lkcl - General
Quoteivo95 He is also using longer supports with 4 LM8UU's. ohh ok. that would be better, then. still, the twisting moment is on the plastic, you can see there's some underneath the H-bar. Quote BTW what do you think about removing printed z-rail parts and just use 50x20 angle bar (http://www.motedis.co.uk/shop/Semi-finished-products/Light-metal-profiles-not-anodized/Angle-bars-not-equal-sidedby lkcl - CoreXY Machines
Quoteivo95 Quotelkcl z-rods to 10mm? mmm.... mehh. i wouldn't say that's a high priority. what completely overshadows that is a design flaw in the FuseBox, which i've documented here: I think that ax (http://www.thingiverse.com/thing:1313587) already fixed that problem in his design: he's made an attempt to do so, but that's not diagonal bracing, is it? yes he's moved the bar back, yes itby lkcl - CoreXY Machines
Quotethe_digital_dentist As I understand deltas, resolution varies depending on XY coordinates - the resolution is higher near the center of the bed and decreases as you move away from the center. . ... and i'm printing 230mm-long parts where the aesthetics are important, and there are critical-accuracy ends that have to fit into other parts. some of the parts are printed upright, and others arby lkcl - CoreXY Machines
QuoteDjDemonD It's cheap and simple and it considerably improves the packaging of the delta printer. i won't ever get a delta printer. just to name a few factors: the accuracy required of the rods, the extra space (height-wise) and the round printbed are all "No" for me. i am printing parts mostly that are 230mm long, 12mm wide and 30mm high (libre laptop parts). to get what i need, i'd haby lkcl - CoreXY Machines
Quotedroftarts Hi Joar Yes, the Duet uses 16x microstepping as standard. You can change the microstepping, but the chip we use (Allegro A4982 ) only has full-, half-, quarter-, and sixteenth-step modes. These are set using the MS1 and MS2 pads on the Duet; put a solder bridge between the pairs of pads to change the microstepping. Ian RepRapPro tech support i didn't realise that the duet 0.8.5by lkcl - Ormerod
Quoteivo95 I will start to order parts for FB2020 by Ax printer in a few days, and since that is my first printer i have few questions. Ax is planning to upgrade Z axis smooth rods from 8 to 10mm and i will do the same, but idk if i should also upgrade leadscrew to 10mm or stay with 8mm? Is motedis.com&www.dold-mechatronik.de leadscrew/nut worth the price (leadscrew is 5€ & brass nut isby lkcl - CoreXY Machines
ok, soo, i've built my first corexy printer (sandwich200) and love it. i'd like however to shrink the footprint, and i've come up with a design concept that is a 280x280mm footprint using the standard 214x214mm printbed PCBs... but it relies on "stacking" the components, so you would have (vertically) belt YRod belt, and the XRods would likewise go one *underneath* the YRods, so it would be loweby lkcl - CoreXY Machines
Quotedavedavedave Ok, so what i want to do now is find out if the heat emanating from the drivers is normal, and if they could get hotter without blowing like my other driver. or is there a setting that i might have not input correctly or might have missed. (by the way, i have a 80x80 mm fan pointed at the ramps blowing from the side. the driver still gets hot which worries me. but this is my fiby lkcl - CoreXY Machines
ok so someone pointed out on one of the other forums that there's something called the "flex3drive", and i have to say it looks absolutely solid and a much, *much* better concept than either direct-drive or bowden. in combination with a volcano set (due to arrive this evening) i think it will be absolutely fantastic, and i will get the speeds i'm looking for. my main "bugbear" with the sandwiby lkcl - CoreXY Machines
hi Mutley3D, looks really good - a rock-solid design. i'm doing a folding, portable corexy printer that fits into carry-on luggage size called the sandwich200, and i'm looking to push things to the limit. what you've come up with looks absolutely great: i like neither the bowden nor the direct extruders - this concept of working off the back of decades of proven manufacturing in flexible driveby lkcl - General
QuoteDjDemonD It was a necessary compromise before flying extruders and flex3drives became available. Perhaps a rare earth magnet geared nema 11 extruder is light enough that we won't need bowden. flying extruders are just.... going back to the idea of direct-drive, but instead of on rails it's... on the delta head. big deal. what's old is new. now, flex3drive, on the other hand, that's anby lkcl - CoreXY Machines
Quotebani so if corexy is not a high speed design, then why would anyone use it over ultimaker type design? compared to a reprap: much-reduced x-y dimensions. i.e. to be specific: greatly reduced extra surrounding space around the print bed. let's look at the original reprap. the bed is moving, yes? so you now have an actual space required that's double the length of the printbed, plus a bitby lkcl - CoreXY Machines
Quotevpt5566 I still think it's a good design and I don't mind the plastic corners as long as everything bolts together tight and the rails are cut well. you won't mind until it's assembled and you push the box at one corner and you go "oh my god did i just *really* believe that plastic without any kind of diagonal bracing could be entrusted to provide rigidy?? whyy????" so, if you don't beliby lkcl - CoreXY Machines
Quotevpt5566 Lots of repraps use plastic frame parts. A reprap printer is supposed to be mostly printable I believe. i have a friend who bought one of the early repraps. he's a competent sysadmin and is scientifically-minded. he only bought it because it was exciting, new, open hardware and he wanted to explore it. most of his time however was spent on printing replacement parts to keep it fby lkcl - CoreXY Machines
QuoteEdvardas They have developed 0.4mm recently ordered one straight away, by fedex shipping.by lkcl - CoreXY Machines
Quotephord Quotelkcl ok phord, i've created a set of build instructions for the 53:13 geared extruder, here: - it includes photos and a commissioning video, i got 120mm/min (12.75mm3/sec) at 210C cleany. at 150mm/min it started skipping. the usual maximum for standard E3Dv6 extruders is around 10mm3/sec. that's with a 0.4mm nozzle, 1/4 microstepping and a 1.1A current limit. Nice! You've clby lkcl - CoreXY Machines
QuoteEdvardas They have developed 0.4mm recently oo! oo! i want one! ok that does it, i'm going to get a volcano adapter set.by lkcl - CoreXY Machines
Quotephord I was hoping your redesign would include a useful extruder for 3mm ok phord, i've created a set of build instructions for the 53:13 geared extruder, here: - it includes photos and a commissioning video, i got 120mm/min (12.75mm3/sec) at 210C cleany. at 150mm/min it started skipping. the usual maximum for standard E3Dv6 extruders is around 10mm3/sec. that's with a 0.4mm nozzle, 1/by lkcl - CoreXY Machines
Quotedc42 Great! Thanks for taking the trouble to support my fork. I'm still hoping that we can get back to a single RepRapFirmware sometime. ... i don't know how long people here have been working with software libre, i was lucky enough to go to imperial college in 1988, and so had access to HP/UX systems (donated in 1989), micro-vaxes, SunOS 4.1.3 systems and so on. we used rcs (!) which wasby lkcl - Ormerod
QuoteEdvardas And 3mm is not really efficient at high volume melting because it has a lot bigger cross section than 1.75mm (filament needs to be melted right to the center). hmmm..... y'know what? would it _actually_ be any different? yes bigger cross-section but the filament stays in for longer: overall it's the flow-rate that's the same. i looked at the volcano options - you can get replaceby lkcl - CoreXY Machines
ok so i've altered the geared extruder so that it now has a 4.07:1 ratio (53:13), and it's stopped "skipping". it does make quite a bit of "clicking" because i split out the centre of the 53-tooth gear as a separate part to hold the MK8, because i was getting fed up of reprinting the large gears. i've put in screw-holes for locking the two parts together but didn't put them in yet. it's quiteby lkcl - CoreXY Machines
QuoteEdvardas What kind of nozzle are you using? E3Dv6.with a 0.4mm. i realllly didn't like the 0.3mm one. Quote 28mm3/s is something that only a Volcano should be capable of melting. Usual nozzles have around 10mm long melt chamber ahh that explains a lot. Quote And 3mm is not really efficient at high volume melting because it has a lot bigger cross section than 1.75mm (filament needs to bby lkcl - CoreXY Machines
hiya phord, okaaay, latest revision to the geared extruder, i upped the ratio to 53:13 (4.07:1) because i was still getting skipping at 3.54:1 (grr) - i also thinned down the height by almost 10mm, and i split out the gear from the drive-attachment as well as split out the filament exit guide. the general idea is, if you want to change or develop something different, it saves plastic. i was geby lkcl - CoreXY Machines
Quotechrishamm See my firmware fork at , it provides a typical Makefile and a build script for Windows. Just make sure you install my Arduino Duet board before you attempt to compile it (requires the latest Arduino version). I managed to get it to compile with dc42's fork as well, but I haven't tried that with his latest firmware version yet. ah very cool, thanks chris. 3D-ES's script "just worby lkcl - Ormerod
Quotedmould HTH Dave appreciated, dave - i have a macbook pro running Debian, with a 250gb SSD, i'm a little reluctant to open it up. i used to build my own PCs - but laptops... i've seen the horror stories of people puncturing the laptop battery from apple macbooks.... i'm really reluctant to take the risk. nice thought, though.by lkcl - Ormerod