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Bowden and retraction

by Anonaab

I've been printing for some time now. Only got one printer, an anycubic kossel delta. It has the bowden tube. The single most important lesson I've learned so far is: retraction is 100% pure evil and cause of most disasters.
The bowden tube requires very long retractions to prevent oozing, about 10mm. Can't retract fast because otherwise filament get stripped. But retracting slowly causes the hot nozzle to melt a visual artefact at where retraction happens (this can ruin e.g. screw threads).
Resuming after retract never works right and there will be either a gap or a blob. Sometimes small features aren't even printed. Sometimes the extruder jams. And then there is stringing regardless. The strings tend to contract, pull the part and cause some distorted shape which eventually collides with the print head. Sometimes the retractions take as much as half of total print time. The perfect retraction settings depend on nozzle, material and the printed geometry, so I never get it right on the first try. Using a large nozzle causes so much more retraction-related problems. I tried linear advance too but doesn't seem to help much. Only bogs down the puny 8-bit mcu.
So I try to design my geometry to be printed without retractions or at least only retract as little as possible.
Definitely not getting a bowden printer again. I'm not really asking for advice, just venting. And I'm curious if anyone else has similar experience.

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Z offset Problem

by majorkuso

I recently started working on my He3d K280 delta again after a few months, I got marloin 1.1.9 working, howver when i set the z offset and print the xzy calibration cube the printhead is about 5mm above the plate no matter how much I adjust the offset. I have added my two conf.h files. Any ideas as to why it would not adjust?

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E1 socket problem (temp sensor defect marked defect)

by tc1967uk

Hi

Total 3D printing newbie here, apoloies in advance if my terminology is wrong.

I have a dual head K200 delta printer with a heated bed which I put together 8 months ago, but gave up due to frustration of the following error in Repetier:

temp sensor defect marked defect
Error:Printer set into dry run mode until restart!

I've tried again today, and all 3 thermistors (and the spare) work fine, but socket E1 on the BT7200 V1.8.26 RAMPS PLUS 2 is giving me -20oC readings no matter which thermistor I put in.

Even though I’ve tried to tell it there’s only 1 extruder (in Printer Settings), the display right at the bottom of Repetier still thinks there’s 2.

I've emailed the seller and the company I bought it through, to see if they can help.

In the meantime - is there any way to make Repetier believe that I only have 1 extruder, or change things so that I can use the heated bed socket for the other extruder instead and just try to make due without the heatbed for now?

Hope you can help.

HE3D_K200 k200 ramps thermistor
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Belt falling of of pulley

by Blitz85570

The top belt is falling off the pulley when I print. This really effects my prints. Any way to fix this?

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New to group and Delta Printers

by Blkrose383

Hello everyone,

Been here on Thingiverse for a while now. I currently print with an Anet A8 which i have modified with tons on files from here and have got it pretty dang reliable. Took a little while but it was all worth it in the end. I learned a lot from the time it arrived at my door to assemble and right up to just this morning when i finished my latest print job. As a tinkerer i am always looking for a new project and found a nice Delta printer on here (https://www.thingiverse.com/thing:1902229) and said what the heck. Lets build a big one!!!!!! Got myself a 1 kg spool of Lime Green filament and started printing on the old Anet. Once all the printing was done i said how big do i wanna go? Well there is an old saying GO BIG OR GO HOME. I ended up buying (3)1220mm or 48" 2040 aluminum extrusions for the vertical beams and (9)1010mm or 24" extrusions for the horizontal beams. This allowed me to fab up a 3mm X 400mm or 16" diameter aluminum build plate which will be heated. I finally got the frame assembly all together this morning and this definitely is a MONSTER DELTA. Just need to get the smooth rods and some more 5mm Tee Nuts and all the mechanical stuff will be complete . Then i get to move on to the fun of getting all the electronics, wiring it all up and then the dreaded setup. I would share some pics of the build if someone will gimme an idea how to post them to a TOPIC. I am not seeing any kind of way to attach photos. I will just put them with the i built one on here for now. Also anyone out there that is using a custom delta that they built i would love to know what firmware and configurationh file ya are using.

Thanks for taking time to read and any possible help you may be able to provide in the future.

Pentachoron - Delta 3D Printer
by MacNite
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