tobbelobb / hangprinter Goto Github PK

Another issue I've encountered is that Gear D (the most bottom one) move a little up and down, which makes it wobble on the sides. Currently I've hooked a washer to the gear above it to fix temopraly.

Is there a better solution to this problem?

Hi,

Amazing JOB that your are doing until now!!! I would like to help you to improve your NEXT STEP of 3d printer that i'm sure will be the award of 2017!!!

You need a more precise stepper motor 16 or 32 step is not enought!!!
You need 256 step with a closed loop system so look at that project:

Wembi:
https://www.kickstarter.com/projects/109167261/wembi-closed-loop-motorupgrade-for-3d-printer?lang=fr

or

Mechaduino (open source):
https://github.com/jcchurch13

but for me a 32 bit controller with 256 microstepping is a must that you need to test so go here:
http://smoothieware.org/smoothieboard and look the V2 model (round shape ;-) )

I will print now your printer and add this features and give you feedback as soon as possible...

Best Regards,
Greg

I watched the two build streams on the hangprinter on Thomas Sanladerer's channel and I remember hearing you have some repeatability issues when spooling/unspooling the wires, I'd go back and make sure but they're 10 hours put together! Have you considered using wires with a pattern on them combined with an optical encoder to close the loop on exactly how much you have on/off the spools?

Having problems printing bottom plate. It staggers all the layers. i have printed everything else just fine. I am hoping you could take a look at that file for me. thanks John!

Hi i would like to build a 3d printer with 4 corners can you give me some ideas?

hello, I was watching the interview with you and Thomas Sanladerer and you stated that you could replace the 2.7mm Eyes Inside Dia Fishing Rod Part with Bowden tubes. I wanted to know how that could be done because I cannot seem to find the fishing rod part near me.
Thank you

should I print bottom_plate or Bottom_Plate2?

Not able to upload .stl files. Get a message that sat "Uploads are Disabled" "File Uploads Require Push Access to this Repository" Can the files be made to be uploadable, please? Thank you, James

Hey! I've been trying to assemle your printer, but ran into one big issue. My motor drivers (DRV8825) constantly die.
I've tried cooling them with an extenal fan, which does prolong their lifecycle, but they still keep on dying on me.

How many amps do you send to the motors?
Can you give me any suggestions?

Hi there,

today I was in the Lab of disasterhack.org in Katmandu, Nepal and they are using your hangprinter to share knowledge about 3d-printing and to enable the locals to create innovative ideas.

Unfortunately there are a lot of power outages in Kathmandu and sometimes the UPS are not big enough to handle that interrupts and to keep the printing process alive.

So they are searching for a kind of restart the printing process at exact the last printed point. Is there a kind of write-ahead-log to log the last known position to sdcard, to re-read it a reboot and start printing at the last known position?

Any hints would be great!

Best regards
potdian

Hey! There's also another issue I've ran into.

Should there be any additional holes in the sides of the gear for lace to go through? Cause I've made an additional hole in the side of the gear for that. Did I do it wrong?

Here are some photos of what I mean:
https://goo.gl/photos/LjXdNViA3kfSeRv28
https://goo.gl/photos/9uA4jrHUeYwvaGfo6

The hangprinter uses stationary anchors for the horizontal axes' lines and this means the build volume is constrained because of potential overlap, right? If instead the anchors move up (on rails perhaps) as the build platform moves up, the build volume would not decrease with height, correct?

I realize this would add significant cost and complexity, but it could be optional, depending on how much work this would take in software of course.

Hi some of the scad files are missing you did update #include .scad file but you didn't upload those files . can you upload those files?

Tobben,

I think perhaps the eyelet pillars on the botttom plate may benefit from some added ribs to increase the rigidity in some areas, maybe even the motor mounts also?

Can we get the scad for the bottom plate so it may be edited and reinforced?

I realize its all overkill, however, with the manner in which I am going to implement the hangprinter, this may become an issue ie in a heated enclosure.

Hi Tobben!

Thank you very much for this amazing work, I just ordered the Vitamins for the printer and I'm going to print out the parts very soon.

Here's a thing: a few interested people and me are wondering why you haven't/aren't moving the movement steppers to the mounting points, in order to save weight on the printing head? This would save 600-750g (of course depending on the steppers used) on the print head, allowing for much higher accuracy, resolution, acceleration and speeds. The two simplest ways for doing this I can see are:

1. Taking the RAMPS out of the print head and putting it on the ground, then feeding the 8 stepper wires (D-Lines and extruder) +heater cartridge, fan and temperature sensor (maybe use a coax cable or amplifier to avoid interference) from the ground RAMPS to the print head and the stationary mounted steppers.
2. Leaving the RAMPS on the print head/moving it to a ground station and routing the stepper driver lines to dedicated stepper drivers mounted on a base station/the print head, depending on which version makes more sense. Pro: much less wires to take care off | Con: much more complicated

I understand that this will make the whole printer less compact and split it up in multiple parts, thereby making it less of a beauty, but I do think it's worth it when thinking about the speeds that could be archieved. Which is on the other hand making it much more attractive to everyone. How about a second brach for "enthusiasts"?

Alternatively you could of course gear down the motors for smaller stepper motors, as the rpm limit of steppers isn't even closely reached (unfortunately I don't have the skills to design this myself, otherwise I would).

Another thing we have come across: We've been thinking that much smaller motors may be sufficient for the D-Lines and extruder, thereby saving another few valuable grams. Could you provide any numbers regarding neccessary N/cm? Maybe by trying out how low you can go on current on the motors?

Greetings!

Matthias

PS. We've created a facebook group for the Hangprinter, you can find it here: https://www.facebook.com/groups/176856636157837

When attempting to render spool.scad, Openscad processes for several minutes. When it completes, the viewport shows several objects that should not be in the spool design and those object must be CPU intensive, because it is difficult to re-orient the view to see what is going on.

I have isolated the bug to the following calls:
18 for(i=[0:60:359])
19 rotate([0,0,i])
20 spool_decoration();

I will try to research more later today.

Hello,
I really like this project and would like to build it. However, I'm new to scad and when I try to copy/paste the lines of code into Open SCAD-->Preview or Render. I keep getting a Syntax Error. How do I successfully get these files to turn them into .stl files? Thank you,
JTonerII

I noticed a (very minor) issue with creating the layout_letter.pdf. The lineroller_parameters.scad file appears to have been merged into parameters.scad. As a result of this, the command 'make layout_letter.pdf' fails.

Commenting out/deleting the appropriate lines in the Makefile appears to solve this issue, and the layout_letter.pdf is generated successfully. I believe the same issue applies to the other layout types, but I did not test it.

Just thought I would throw this out in case anyone has this issue.