Is Vref output analog (DAC), PWM or someting else?by newbob - Developers
Each ESP32 batch has different characteristics. Considering that repeatibility is more important than accuracy (i.e. if printing works well at 220 setting - it does not matter that it really is 210degC as long as it's maintained) having no lookup tables it's not a showstopper (and I don't think non-linearity is significant to throw PID off) but something to keep in mind (in case you need GPIO foby newbob - Developers
ESP32 ADC has non-linear response and lookup tables have yet to be provided by espresiff.by newbob - Developers
To increase sensitivity, try adding another layer or two of kapton under one of the piezo sides - that should put it under extra stress.by newbob - General
Quoteprot0typ1cal PWM rotary vane pump. Only 50db, 24V option available. Only 1.3L / min. I don't know what it should be but it seems rather low.by newbob - CoreXY Machines
I wonder how much output would be sufficient? Ultimaker (for example) has two fans 9L/min (2.2cfm) each - therefore I suppose 1/4 of that output should be sufficient when using air nozzle which would be 4.5-9L pump. Probably would be good to get 15L and turn it down with a valve. I don't think DC pump could be regulated with PWM like DC motor pumps can be (maybe it would be possible to plug inby newbob - CoreXY Machines
608 bearing has 4mm balls in it. If you want the ball centered, print a little 5mm OD washer and place the bearing in it.by newbob - CoreXY Machines
LNP STAT-KON EE004 is a compound based on Polyetherimide resin containing 20% Carbon Fiber. Added features of this material include: Electrically Conductive. PS.: you can make your own: electrically conductive PEI pellets.by newbob - General
Looks good, though the gantry must be pretty heavy - how quickly (in minutes) did you print that 3DBenchy? How did you join profiles together w/o the corner brackets? I also see you've switched from horizontal to vertical X axis. Do you like the new arrangement better? I think horizontal should be more precise because you can control slop in the horizontal plane where it counts.by newbob - CoreXY Machines
Did you verify that driver micro-stepping is the same for both?by newbob - Developers
Get a better extruder wheel. The one you have has large teeth spacing which does not feed smoothly especially with Nema 17 direct drive extruders.by newbob - Printing
Can you print a quality 3DBenchy in less than an hour? PS.: I like that your design is only using aluminum plates and extrusions. It appears that everything can be adjusted and design has high tolerance to variability of the parts. This may be a pretty successful kit printer. One thing that would concern me would be X axis side load on the rollers causing premature wear and increased slop witby newbob - Developers
Quoteleadinglights YouTube recommended a video showing a Taz auto-leveling upgrade ( ) that had me thinking. The auto-leveling that was shown depended on electrically conductive buttons at the corners of the bed but it strikes me that there is no reason that this couldn't be used to check for nozzle cleanliness. A plan may be a very thin stainless steel shim, 0.05mm thick and say 20mm diameter,by newbob - General
PETG recommended temperature is between 240 and 260.by newbob - General
QuoteDjDemonD Have you seen this expensive but I've been thinking of trying it. Looking at it up-close I think that irregularity of the tooth shape and lower friction due to fiberglass may add backlash lower repeatability.by newbob - General
Quoteleadinglights I have managed to confirm that it is possible to get a short thermal break . This required a HF "soft" ferrite washer to localize the magnetic field and prevent induction into the thermal break area. Having said than, I can now see no good engineering reason to use induction heating as it is unlikely to be lighter or cheaper or less complex than the resistive options. Geek factby newbob - General
Consider making a build area rectangular 300x600 instead of a square. Shorter X axis will be lighter and will let you print faster...if you're impatient like me, printing large items slowly is exhausting EDIT: I see you want to print big. I've been considering using titanium rods, however did not find any good sliders to go with. Titanium is strong but only half as hard as chrome so using rby newbob - General
Quotepugzor Nice prtints...actually they look flawless. Which extruder are you using and at what speed did you print them at?by newbob - CoreXY Machines
I thought that was already a case as extruded plastic is round and gets flattened between nozzle and bed. It's gets flatter when bed gets closer and rounder when bed 'moves' away from it. I suppose one could increase decrease extrusion (not sure if non geared extrudes have the resolution though) to maintain even width however since bed leveling is an approximation you cannot get rid of the widtby newbob - General
Quotearthurwolf Quotedc42 Here's why people get confused about torque and microstepping. Actually, I already know everything you've just said. No confusion here : Still. From what I understand, it's your explanation that is a misconception ( or rather an oversimplification ). Yes, as microstepping increases, torque *per step* decreases to the point where you aren't getting more accuracy. Butby newbob - General
Quotechriske Quotenewbob Quotechriske Quotenewbob I would not dismiss delta design too quickly. As far as I am aware only delta and light weight corexy printers can print at over 100mm/s with decent quality. Not a Delta but mine(own design) can print also with that speed and even faster and with a very high perimeter quality. The printer in the image is a prototype and works perfect. Busy makby newbob - General
Personally I would go with single motor/dual screw z-axis for bed this large.by newbob - CoreXY Machines
It's my PC that cannot play movies atm. Anyway, here are wheels that I had good experience with: PS.: First one worked the best for me, however it clogs up more (it also works better with weaker steppers). Note that first needs flat pressure wheel, second with a grove. It's probably the best to get whole extruder assembly if you're just starting or you can print your own:by newbob - General
I cannot view the video but just from seeing the first frame I can make educated guess that it's a bad extruder setup - large spur gear with few teeth and filament path is not straight. Clicking is most likely due to stepper missing steps as spur gear teeth dig in to the filament with different force depending on their position.by newbob - General
Quotechriske Quotenewbob I would not dismiss delta design too quickly. As far as I am aware only delta and light weight corexy printers can print at over 100mm/s with decent quality. Not a Delta but mine(own design) can print also with that speed and even faster and with a very high perimeter quality. The printer in the image is a prototype and works perfect. Busy making a larger version thisby newbob - General
Here's piezzo vibration sensor by DFRobot: Can be ordered directly or, maybe, through digikey: Schematics:by newbob - General
I was talking about the cost of only kit that is available ( I'm not criticizing team efforts and I think this is a good way to start but not a way for wide adoption ) but for wider adoption such probe has to be cheaper to end user than Chinese BLTouch clone. Of course components are cheap but time and effort to put it all together is not trivial. It does not help that currently the only avaiby newbob - General
Quotesudarshan Newbob....you are right....the Veblen effect is not worth giving into.....I want to find out the techniques which yield better prints. like..sturdy frame...good print bed....playless guides...zero backlash screws and nuts or belts..etc...I want to know which companies takled these problems....and how did they do it...and how can we do it...which are the better sources of getting gby newbob - General