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7

Much like your car, the number of miles, or the number of prints that you can get out of it is entirely up to how well you can maintain it. A 3D Printer is a machine, and a machine needs general maintenance; if you see something starting to break - or get worn out - or anything abnormal, fix it. I am sure that if you had something like a MakerBot, it would ...


5

Have a look at the image provided in this seller's part description. it probably says more than my words could (which would also only rely on images - your parts just looked like I saw them somewhere before). 3D printer parts right hand Bowden Extruder kit set no motor compact extruder aluminum alloy for


5

After some more testing I checked that the problem shows up only on Z tower and is not related with current. Examining the tower I found very dumb mistake. Pulley on the motor didn't have a setscrew! Don't know how could I missed that. The fact that it could somehow run is even more amazing. Thanks @tom-van-der-zanden and @darthpixel for help. It is for sure ...


4

As a guess, you are using the wrong command. If set for n x n grid, you get 3 point measurement with G29, but that is not auto leveling, it is just setting Z height - based on average height at 3 points. What you need is G32 S2 with S2 to store result in EEPROM (and therefore you should have EEPROM enabled with auto leveling. It is also used to store ...


4

According to discussions in comments, I'm pretty sure the problem lies in too low current. Please review this answer to How do you make sure you have the right voltage on the trimpots on a A4988 stepper driver?. Why it happens? If there is not enough current then motors can omit some steps as the stress is not equal while going up and down. Sometimes ...


4

So the problem was that the TMC2208 were wired for UART mode, yet Marlin was configured for standalone, which apparently makes them work, but with completely wrong step sizes. Changing it in the configuration completely eliminated the problem


3

Delta printers are considered to be able to be accurate printers cause of the limited weight in the head (using Bowden extruder setup). The positioning can be very accurate (limited weight, limited overshooting) and because of the limited amount of weight, the print speed can be increased. An interesting paper has been written on a comparative study between ...


3

For the M3 t-nuts, could you use this printed solution. You are just attaching a PCB; so, it you wouldn't need that much strength. Another excuse to use your 3D printer. ;)


3

I bought 2 of these kits 4 years ago, and I have been really pleased with the quality of the kits and the results. Sadly this supplier is no longer trading, as he could not compete with low cost imports from the far east. I have the STL files for the printer kit, so you should be able to print any parts you need. I have created a Github repository with a ...


3

I found two lists for the Kossel mini (the documents you referenced are for a mini, so that is what I am assuming you got). One as a Google Doc and one as an order sheet Both seem to list all the fasteners. Here is a Sintron mini carriage assembly and it lists the hardware included I found an ebay listing for the Sintron 2020 Rails. The recommended ...


3

Skew distortion in deltas means there is something physically wrong with your printer build, such as the towers not being evenly spaced or being tilted. The first thing you should do is confirm the mechanical build -- measure the distance between towers, angles between towers, parallelism of all three towers, and perpendicularity of all three towers to the ...


3

Delta bed leveling has been dodgy in Repetier for a long time. There are a number of fixes occurring in the dev branch right now (June 2016) if you look at Github. So it's getting better, but I wouldn't call it mature yet. (Delta auto-calibration is one of the only big shortcomings of Repetier, in my opinion.) The problem with approaches like bed plane ...


2

Cool you placed my Kossel Mini on Stackexchange! What I have modified to the standard kit: Retractable probe using RC Marlin (Rich Cattels Marlin with auto bed probe functionality). Never have to adjust endstops after it is once setup. All can be done in firmware. Made a transport case, in the picture the cover is missing which is a triangular case which ...


2

I know this is coming very late, but I'll post anyway in hopes that it may help somebody else experiencing the same frustration. I received all of the same suggestions again and again on the forums -- about baud rate, COM ports, and a lot else which failed to get Pronterface to connect. At last I posted to the Anycubic User Group on FB, and quickly ...


2

When assembling the hot end tip, make sure you screw in the extruder tip to the aluminum block first, then screw that assembly to the heat sink fins. On my Kossel, I did it the other way around, and had very poor results. If the whole assembly is spinning, then the clamp screws are either too long and can't tighten properly, or the holes might be stripped, ...


2

Localized underextrusion usually means you're oozing material somewhere it wasn't supposed to go. Since you have Marlin 2.0, linear advance might help solve that, and in general right retraction amount is important and turning off combing may be needed (combing over infill allows material to ooze). Also there are reported bugs in Marlin 2.0 such as https://...


2

It is a common problem with "delta"-style circular parallel kinematics machines. It is called Bowling. It can lead to the presumed Z=0 plane having a bowl-like shape. The actual error shape can be more complex. The job of "bed-leveling" is to make the realized z=0 plane to be identical with the bed. If you can, use a multi-point (like 40+ points) ...


2

After examining the guide (Kossel mini instrution by sintron technology_v2) and the printed parts kit, I came up with an 99.9% complete parts list. The lists relating to the effector and autoprobe mount maybe slightly incorrect: ##Parts List ###Listed by Printer part/section: ####Fasteners #####BOTTOM VERTEX (QUANTITY = 3) For each: 10 x M3 x 8 mm 10 x ...


2

I attempted to create your drawing but discovered that an important set of parameters is missing. You have to have either the intersection point of the legs (73.34) from each side or the angle between the legs (73.34) and the base (106.41) to create construction lines. Once you have either of those items, you can construct the remainder of the design using ...


2

I would check the "steps per distance" setting. If the motors were moving more than the firmware thinks, the height would measure as shorter than actual (since the number of steps would be less than the firmware expected). Similarly, the radius would scale up. You replaced the controller and motor drivers, so perhaps the micro-stepping is different. If ...


1

It is possible that your printer is over-extruding, and this will certainly give less satisfactory results when you try to print models which have internal clearances. It is also possible that you have some calibration issues which affect orthogonality, x/y/z dimensions or flatness in each axis. In terms of general improvements, slower and maybe cooler ...


1

Finally I found out that it was caused by not enough torque output by B tower stepper motor. Increasing current didn't work. I replaced the stepper motor and it prints perfectly.


1

I love me a challenge so I just hacked this together: (a half waiting for mirror) As for strategy, I simply used the line tool to do a basic shape and then went to town with constraints and dimensions to see what I end up with. Can't fail. Clearly, you're missing information to constraint the sketch fully, but if you have the extrusions and the machine, ...


1

First, you should make sure that printing surface is adjusted correctly: it must be perpendicular to all three delta columns, all other adjustable parts must be checked and adjusted if necessary (depending on actual printer design). Assuming that upper end-stops can be adjusted as well. Home effector with G28 command, then move it close to one column (some ...


1

To compliment tjb1's answer, The link seems to go to a spreadsheet that doesn't have any formulae in it. However, I managed to find a copy, from Google groups: How to calculate Delta Dimensions for new build. However, another source of the Document is Kossel frame calculator (delt...@googlegroups.com). Right at the top is a posting of Johan's (who is the ...


1

Most information I was able to find was the arms are 80% the length of the horizontal structure. I did find a copy of the original Google Sheets that everyone used a few years ago here. The source of that link did mention that there may have been some issues with it but all of those links were dead ends. Some things to note: The height doesn't matter, ...


1

I recently purchased and assembled the Anycubic Kossel Delta printer and ran into the same issues. I found that if I tried to connect with "COM 1" first, it would error out, then when I switched to "COM 4" (the correct port), it connected. Weird, I know, but it works.


1

Only one application can access the Arduino Mega board, via the COM port, at a time. Sometimes, the software can get confused, and keep hold of the COM port, although this is unusual. For example, if you are connected to your board via Pronterface, and without clicking on Pronterface's Disconnect button first, you then try to upload some code to the ...


1

I know this may be a little late, but I bought the same printer and found that I had problems also. To fix this connection issue I first made sure I had no arduino programs open that were trying the connect to the printer. These would not allow Pronterface to connect to my printer. Then if I still had issues I opened up task manager on my computer just to ...


1

I have built a Kossel too. Got lots of tips from the Google Deltaprinter group. Most important when using the Traxxas rod ends is to have the metal parts go into the freezer and the plastic parts in warm water(not boiling, just 60 degrees celsius or so). Then put the 2 together, due to the fact the metal crimps just a little and the hot water softens the ...


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