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Printing issues ...
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Yeah, it is just the whole Z-axis on the core XY. Best solution in my opinion is some sort of combination of 3 lead-screws but this is complex. Often you see one with rails and one screw but then you get tilting beds etc.
With your standard RepRap style printer, you have two Z lead-screws, they have issues of being un-coupled and adding complexity. Hence you get cantilever designs but they on
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NovaHuta
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General
Ok so, Thomas S. is messing with belt printer, it is very cool but has challenges of it's own.
He makes a point, it is a COREXY at an angle and I'm thinking hmm .... put an angle on the print head so it is vertical. Problems solved?
Then I'm thinking, get rid of that silly belt.
Put the angle back at 45 then put angle in print head so it is vertical .... then have a simple build plate - no be
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NovaHuta
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General
I have a very seasonal confession. I was a skeptic of the need for mesh bed leveling (gasp).
However, I share an image with you that makes me a believer. It is a photo of the bottom of a 150mm x 220mm raft. The longer direction is in the Y-Axis.
From this, you can see that the first layer is thicker in the middle (lines are thicker horizontally which means they are more squished there and be
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NovaHuta
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General
Yes, would agree that it does get hot. I've reduced the current to 550mA. Still though, it gets warm. In my case, I'd also needed to make a new mount to hold the unit so, made one that directs the hot-end fan air over the sides and back of the motor (and away from printing part).
I must say, it works very well. github project with cooling mount
Currently, it works but may be .. es ist nicht
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NovaHuta
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Extruder, Hotends & verschiedene Materialien
@Alfred Joosty :
Yes, having some good experiances with this hot end. I've gotten the volcano variant and clone from Triangle Labs and it works very well. For a HyperCube machine, the mount that comes with it would probably work perfectly. Anyhow, I did just make a video which explains some common ill-advise. Supplement that with the other popular coverage on the hot and and you should be
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NovaHuta
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Extruder, Hotends & verschiedene Materialien
I'm surprised at the focus on stepper and interrupt rates. With the latest range of TMC drivers and the like, the interrupt rates aren't so important. Like with 2209 or 2208 even.
The microstepping is now all 'simulated' in the driver and therefore you get microstepping without the interrupts.
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NovaHuta
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General
To be clear, the story of ramps burning up could be related to incomplete conversions to 24V (change polyfuses!), to poor connectors from cheap clones, poor user wiring practices (use ferrules!), or use on 3.3v logic (DUE) with Mosfets poorly suited.
If you are familiar with all those issues, you are in good shape to use any RAMPS
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NovaHuta
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Reprappers
MKS-GEN1 is a nice looking board. I'd just throw in I'm totally happy with the SMART RAMPS board being sold on AliExpress lately. Note that it can be used with a DUE or a MEGA2560 with Marlin now. Some details here
For that Z motor issue on the MKS board, you'd just need to make a parallel wired cable for the two motors. That would be same difference as it is on a RAMPS board. Actually, it is
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NovaHuta
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Reprappers
@grp-gaijin Your parts look pretty good. There does seem to be an under/over extrusion issue that is causing roughness. A little hard to tell from the pictures due to resolution but I'd hazard it is over-extrusion. Have you calibrated your extruder? Would look at that if you have not done so.
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NovaHuta
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Reprappers
Ah, it does not look stable to me. Bed would be fine on flat surface, the X-axis looks susceptible to vibration.
If it isn't your first printer, I'd be thinking more like core-xy or maybe even delta robot.
core-xy is likely a more traveled road and to my mind looks better for those printers where you want an enclosure.
But if you want moving y-bed printer, then here is one I'd recently done f
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NovaHuta
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Reprappers
A pardon me, I should specify in that repo that I'm talking about the itopie400+ branch.
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NovaHuta
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Firmware - Marlin
Hi All, was just gonna build exactly what was there but well, it started with .. why do I need to buy 3 different sizes of rod and went on form there. All changes were for convenience of ordering, building, and performance (where it was 'free').
Build experiance and GitRepo of iTopie400+
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NovaHuta
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Reprappers
Hi y'all. Just completed a build of this printer. It may be out dated but it is 'classic' ?
There were some updates to the design and all resource material, mods, etc. are here.
github itopie400+
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NovaHuta
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General Mendel Topics
Good board choices!
I'm also likeing the RAMPS based boards due to community support and flexibility. Initially, I'd bought th SMART RAMPS board (a 1.4 based one) for the DUE as I'd had one lying around. Was working great until I'd bricked the DUE. Fortunately, I'd had a MEGA 2560 lying around and switched to that. Only, bugfix-2.0.x does not support that.
Still though, it does now as the
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NovaHuta
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Firmware - Marlin
@impartit :
If you're homing to Z_MAX and using bed leveling, you'are going to want to set the Z_MAX_POS very accurately.
Here is open feature request and check out the link to my recent experiance where the logical print height was larger than the physical one. Sounds like you have the opposite happening.
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NovaHuta
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Firmware - Marlin
@DrumClock, why yes you can. I've just gone through this myself. Only, for which board are you using? I've done it with a MEGA2560 and SMART RAMPS (very similar to RAMPS 1.4).
Here is a config for it for reference ..
BTW: It took me a while to figure out that you must connect the DIAG pin to one of the Z-MAX/MIN pins.
Also check out Gcode command M43 .. you want watch the pin to confirm wh
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NovaHuta
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Firmware - Marlin
I'd also just add to this that this likely only applies to machines that home at Z_MAX.
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NovaHuta
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Firmware - Marlin
Ah, so, I'd just tried the above, using M206 command as stated. That didn't solve it. That just made the printer print in the air above the bed by that much (3.305mm).
This is a custom printer build, so, I then guessed that my full build height is off. I'd adjusted
Configuration.h:
#define Z_MAX_POS 255 // was 259
down by 4mm and now I get the following.
>>> g29
SENDING:G29
Pr
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NovaHuta
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Firmware - Marlin
With a newly installed z induction probe, I can use auto-bed leveling (ABL), yay!
BUT, I have an extreme case of z-layer squish because of it. In the first 10mm wihere ABL is compensating, my 10mm hight is coming out as 6.56mm. That is 3.44mm of squish!
Here is a photo
That 3.44mm of lost height is a number suspiciouly close to what is in the bed leveling matrix below.
Loaded /Users/k/De
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NovaHuta
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Firmware - Marlin
So have this combo of parts working largely with SMART RAMPS board (v. 1.4.6), TMC2209 drivers in UART mode, and AZSMZ 12864 LCD display.
All is good but having issue with freezing on insert of SDCARD. LCD becomes unresponsive but firmware is still responsive over the serial port.
Any clues? Seen tickets from 2018 but they are all closed now so ... must be me?
Here is the pinout dump :
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NovaHuta
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Firmware - Marlin
Searched around, yep, I'm pretty sure the thing is dead now.
I did find this tip which I share here because it was hard to find and topical. Was from a forum on Microchip.
I tried it but it didn't work for me. My signal generator can output up to 20V but I'd noted that there was a high load on the chip, with 3.2V output, connected it dropped to 1V. I'd cranked output on generator to 20V but
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NovaHuta
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Tech-Talk
So, I'm adjusting Marlin config, burning and testing.
After a burn, I look at screen, it is blank, the hotend is still on and it starts to smoke, turn off power... what happened?
Arduino Duo board looks fine, no smoke (except for hot end), Arduino IDE recognizes CPU but no communication with SAMX3E8. Poke around, checking voltages, all good. Get Oscilloscope out, crystal to programmer chip is
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NovaHuta
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Tech-Talk
Thanks @Dust. Ok, I got around it by disabling watchdog but I will re-enable with that setting.
What made progress was switching from using D18/D19 (Z max/min stops) and also Serial1 to using Serial2 which is pins D16/D17.
I've also disabled EEPROM for now .. one problem at a time.
Perhaps I didn't disable Z stops properly but anyhow .. progress to this ...
I've already switched the Y drive
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NovaHuta
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Developers
Hi Y'all. I'm trying to get my first machine working here, all built up but there are issues with custom marlin firmware.
It is SMART RAMPS board with DUE and configured for 24V using a buck converter to bring 24V to 7V for the VIN on the DUE board. Also has four TMC2209 drivers where I'm attempting to configure UART mode on the Z-MAX and Z-MIN pins (these are hardware serial 1 pins, D18 and D
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NovaHuta
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Developers
Can anybody recommend a good place to get my new 3d printer parts printed? RepRap style?
I got one quote from a place online in Toronto area, like 300+$ for 10 pieces. Ridiculous. Would print at library but darn covid lockdown.
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NovaHuta
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Canada, Toronto RepRap User Group
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