Search this link for 'servo' and you should be fine. The pinout of this clone-board is provided online (also in this thread) Just add the M280 Sxx command prior to your bed/z probing.by to3dornottobe - Controllers
Thanks for reporting that Megablue. That's something i was wondering too. That should be the most ideal mode for running the diodes as pointed out here; I'm currently test-running a delta with this board, so far it all goes smooth(ie).. The reprap graphic lcd works (if you simple flip the two plugs, too bad it's not in their documentation though) G31 works like a charm once setup (bed grid caby to3dornottobe - Controllers
I meant closed loop for a bowden-fed setup. Not closed loop with filament perse. I'm aware that part didn't came through in my statement.. Did you read the rest of my post? There are some viable facts in that post that are not a mere opinion. I'm personally a fan of direct extruders over bowden, so that was my reason for making a lightweight extruder. I know the combination of steppers and encby to3dornottobe - General
With bowden extruders the retraction plays a large role getting good prints. The quasy-steady state is not the case. And it needs high acceleration. perhaps it's feasible when completely ignoring the encoder at a retraction (g10/g11 in Marlin) In my opinion it's complete bullshit to add an encoder to the filament. What do you do when the extruder simple is unable to push the filament through theby to3dornottobe - General
About splitting the encoder from the motor; You can't compensate structural misses (play, backlash) with PID tuning. You need an intelligence that's capable of determining the difference between the input and the output. and store these differences to make it 'as close as possible' (stil, not ideal).. But this would require both an encoded motor and an encoded reader to determine the difference bby to3dornottobe - General
With a decoder and a bowden it's still impossible to use flexible filament. I have this discussion with a friend, telling me servo motors are the one and only option for a CNC, while i am capable of machining within .02mm with my 'ordinary' stepper driven cnc and that number goes down to .01 if i'm using more effort. He's right; closed loop is better in theory, but it's not holy. In the end it'by to3dornottobe - General
The lightweight extruder makes a higher acceleration easier, when the same construction for moving x/y is being used (with either corexy, cartesian or delta printers) the ringing effect is also smaller. About the Felix printers; The moving beds mass is one thing, but the problem with a horizontal moving bed arrises with a higher (less stable) or heavier print. I'm not a fan of that concept, butby to3dornottobe - General
It depends, 7075 T6 is pretty tough.by to3dornottobe - General
The intention of a lightweight extruder (for me) is to get a fast motion with high acceleration, and due to limited mass a better quality in terms of ringing. I think speed of the extruder is compromised with a too high ratio, I'm running out of excuses for not making mine. All the parts arrive today (mk8/gears/bearings), so i guess i need to start tinkering, turn on the lathe to make a holder fby to3dornottobe - General
What did you use for measuring the steps? and where do you measure them?by to3dornottobe - Controllers
Just received my pinion and 76t gears. I've made the 18T pinion accept the 5mm motorshaft, Waiting for the MK8 to arrive. 140g vs 100g is a huge difference, i would go for the 14HR08-0654S without a doubt. The lighter 7Ncm version would be great, if it works.. . I thought about a 2 pane damper for absorbing ringing. more on this later, first need to focus on the lightweight extruder..by to3dornottobe - General
Perhaps adjusting the base_stepping_frequency? What current setting did you use on your setup? ( (alpha_current, beta_current and gamma_current)by to3dornottobe - Controllers
Are the tests done at low speed or high speed? The junction_deviation as used on smoothie; Not the same as jerk, according to the text below; from my best of understanding, jerk on Marlin is the value in mm/s where the motors can start at/change direction while neglecting the acceleration. From 'jerk' speed to max speed, the acceleration number is used (again, on Marlin) On Smoothie it should woby to3dornottobe - Controllers
At what voltage are you running them? i'm about the fire up the same setup (also using these wantai steppers) and it's using 24v. My other printer is using the DRV8825's as well, with these motors (but it's using marlin) @15V, it's also running ok. Are you sure the issue is related to the link you've posted? Not a 'jerk'/ acceleration thing? (jerk is junction_deviation, correct me if i'm wrong)by to3dornottobe - Controllers
The numbers don't give you the specified torque, those numbers are holding torque, a static number. You need a graph of the actual torque in relation to RPM to determine the torque we need. I'm using an 18/76 gearing, with the opion to go to 15/90 (4.22:1 vs 6:1). i'm looking into the cooling part too, perhaps a single fan, with an adjustable ratio between workpiece/hotend. I was looking at a tby to3dornottobe - General
Thanks for sharing thefrog! Is that an Igus slider? You are currently using a fan on your setup as well, right? (with heatsink or not? I forgot) I'm going to use an MGN12 slider on my coreXY, that weights a fair bit. The metal gears are also heavy. 48p gears, btw? The weight of the e3d you mentioned, that's without fan/ fan shroud, correct?by to3dornottobe - General
Just found a pair of these MR85 bearings in my bearing box. 0.7 gram for twoby to3dornottobe - General
LOL! i thought I was being cheeky with the 5x11x4's. These MR85's are tiny! the two 5x11x4's weight 2.93 grams per 2 btw.. The MK7 hobbed should weigh a fair bit too, (i guess around 6g, perhaps the MK8 is better since the goal is to make a lightweight extruder) i'll get some MK8 hobbed gears as well.. And I'll order some MR85's to do some testing with. Just a thought; it would be rather simpleby to3dornottobe - General
I've just finished putting the lightweight nema14 in cad (rough drawing, haven't taken it apart for exact bearing sizes etc) it's size accurate to suit my needs. Began on drawing the motor plate, for now with adjustable gear mesh enabling a large variety of spurs/pinions, Thinking about making a generic solution for using different makes/brands of spur gears (an adjustable holder using M3 screws)by to3dornottobe - General
QuoteIt`s Chri, not Chris You got to give me some credit Chri! I at least typed a few times right QuoteIt doesn't sound very good. On a corexy you'd have to add extra weight on the Y carriage, No, that's not what I meant. You could use the motor stationary as well and have the X/Y motion cancelled out and interpreted in the XY motion when extrusion movement is needed. But at high speeds that dby to3dornottobe - General
@realthor; Yes, i've thought about that as well. The sliding gear is the challange, this is why. The torque-rod part is too thin, it will bend badly when the carriage is far away from the E motor. What would work if you use an endless belt and a gear (driven on 1 side) and a stationary E motor , cancel out the X motion in the firmware and use the difference compared to the E motion. Needless toby to3dornottobe - General
this is the used motor. A cyclodial gearing might look easy, but it's rather complex/expensive? in terms of bearings/sliderpins. If anyone needs some machined, i have access to a neat little homegrown machineshop. I do think that traditional 48p gears might cut it, and they cost only about 5usd a set when bought in small quantities. @thefrog; is 160gram the total weight of your carriage? Extruby to3dornottobe - General
The one you are using delivers roughly 2.5 times more holding torque, (static holding torque doesn't say it all though) allthough it weights 190 grams? is that correct? that's fair heavy. Do you use a gear reduction with that motor?by to3dornottobe - General
For my project i kind of rejected the planetary reduction. Too long and way too heavy for my likings and needs. The current motor and reduction I'm planning on using should weigh about 70-80 grams. The nema 14 Motor weights 48g with long wires. Haven't decided whether I'm going to machine it from aluminium or make a version that's printable. perhaps both, so the community could benefit from it asby to3dornottobe - General
If maxon only was chinese, sold it for 20usd and used a steppermotor, they would have been king in this topic About the maxon motors, I must admit, i'm a sucker for that type of stuff as well. Just going through their page, it includes prices as well. Byebye Maxon.. you mean 120000 rpm btw! I think a brushless inrunner from RC is more cost efficient.by to3dornottobe - General
This nema 14 is only available in .9 degree, so that tames down the torque somewhat. I'm having doubts that this 7Ncm can provide enough power, leave alone a 1.6Ncm. It's very compact compared to a nema 17. I'll shoot a picture of it in contrast to a nema 17/nema 23 stepper. I'm using 48p gears. In an 18t pinion a 5 mm hole should fit fine. Just make sure not to buy the hardened traxxas pinions,by to3dornottobe - General
Yes, the board is now sold with all the fixes needed to have a working ethernet connection. The link you posted is the shop of makerbase.by to3dornottobe - Controllers
I just recceived the 14HR05-0504S, That thing is tiny. (oo,) some 48p gears are on the way, an 18t and a 76t/90t spur, which should give me ~ 30/35 N/cm of (holding) torque. With the used mk7 hobbed gear (larger diameter, means more grip on the filament) this translates into ~5 - 6kg of pushing capability. Don't know how it behaves at (higher) RPM though. torque will be significantly lower. Ifby to3dornottobe - General
Contact the seller before buying it, say that if this fix hasn't been applied you want a full refund.by to3dornottobe - Controllers
Those nema 14's are a good find! that 14HR05-0504S is BINGO for me. Thanks for sharing. I'll try to see if i can score one. That earlier mentioned cheap steppermotor with build in reduction is lacking bearings IMO, perhaps it's possible to modify it. That pencil principle might work, nice, a retro Rotring. Lovely pencils. But it would require quite a complex mechanism; retracting wouldn't be theby to3dornottobe - General