Anycubic delta kossel xl: repairing and onest review

A friend of my ask me if I could repair his anycubic delta kossel xl.

It’s not an expensive delta kossel. It was a 180$ kit. One of the chepest one I think.

I never had the chances to work on a kit like this… I always build my printer by myself. But I said yes… and the works begin.

The delta kossel that I have to repair
The delta kossel that I have to repair

So… what are my impressions?

At first look the printer is quite WEAK and LIGHT. The weight is somenthing like my mini delta printer, made completely form iron plate and aluminum profile. The frame isn’t very rigid too.

In this model there isn’t a belt tension system… you have to tension the belt manually… and it’s very easy…

The delta arms/rods are quite good: 3mm ball joint and carbon fiber rods.

Kossel effector. With just one fan, and the hotend-micro switch probe system
Kossel effector. With just one fan, and the hotend-micro switch probe system

The effectr is light too. One hotend (E3D clone?) with just one fan (ONLY ONE?!?!) and it has a probe system too. When the hotend touch the plate it will rise a little bit and it will hit he z.min hotend mountend on the effector. Easy.

But I don’t like it very much… I always afraid to ruin the nozzle.

MK8 bowden extruder clone
MK8 bowden extruder clone
MK8 bowden extruder clone
MK8 bowden extruder clone

The extruder is quite a standard and quite good. I have used this before and I like it. Can’t print flexy materials, but for PLA, ABS and other standard filament will be ok.

Now lets start with the broken part.

The fan mount on the effector was broken. Anycubic… you CAN’T mount only one fan (just for the hotend body) and with a weak piece of plastic…

The carriage tower where broken. ALL OF THEM.

delta carriage. The are tooooooo weak
delta carriage. The are tooooooo weak
It can afford to sostain the pressur of the wheels witout broken itself
It can afford to sostain the pressur of the wheels witout broken itself

IMHO they where printed with a low quality parameters, and with a low quality plastic. The model itself as some weak point:

  • The plastic in the curve is too thin, and it as much less pressure force.
  • the wall for the screw to regolate the pressure is to thin too

And it was really light. Like it was printed with low infill…

Come on Anycubic… ok this is a cheap kit… but you come from a country that produce a LOT of filament. You can afford to put some more plastic inside them!

i have to admit that this in one of oldest kit I think. Now they ship kit with plastic pieces made by injection mold.

the plastic is really cheap. Too light.
the plastic is really cheap. Too light.

So I started printing some other carriages, stronger and easy to mount.

There will be 2 pieces for each carriage. One for the joint arms
There will be 2 pieces for each carriage. One for the joint arms
One for the wheels
One for the wheels

repair_delta_kossel_09

Fully assembled
Fully assembled

The design are not mine. I have downloaded them from thingiverse. You can find a lot of these model from thingi. And you’ll find one for your needs.

Nice pressure
Nice pressure

The wheels now have a nice pressure. The movements ares really good. But I don’t love very much these wheel. I have used only gslot wheels (they are V shaped wheel like openbuilds wheels and they perfectly fit in they special profile), but these wheels has a round shape… and thei don’t fit 100% in the profile… But it can work fine.

img_20171017_161345865img_20171017_161417942

All the carriage mounted
All the carriage mounted

One ce all the carriage are in their place it’s look better than before :D

Now it’s look alive again.

repair_delta_kossel_13Once of the weak poin is the rigidity of the upper triangle… I can bent it only looking at it… Just Jocking…

But ok I need to fix that to… I want it more rigid… but how?

Before the mod
Before the mod
A piece of MDF
A piece of MDF
After the mod
After the mod

Now the upper triangle is more rigid. The towers can bent quite a little… But I can’t fix that… becaouse the fault is in the plastic corners.

The last think I have to do is the fan duct for the hotend.

Need to add a fan duct
Need to add a fan duct

Lucky of me I still have one of the old fan duct that I printed when I built my first version of the delta. It fits perfectly. And I could add 2 more fan to cold down the printed piece.

Fan duct added! It's magic
Fan duct added! It’s magic

So… now the calibration and tuning.

The printer come with an Arduino Mega 2560, with ramps shield and 4 A4988 stepper driver. The bed will be controlled by a car 12V relay.

I have installed a MKduo for this printer, and it works like a charm. First I have calibrated manually but than I have set up the delta auto calibration geometry and now it can calibrate itself quite easly.

But the final question is… CAN IT PRINT AGAIN?!?

YES

I have downloaded and printed a little statue too. A little jack reaper.
Printed at 0.1mm layer height.

It come out really well. It has some strings effect. Well.. I have printed it with no air flow on the piece… so I think it’s normal.

repair_delta_kossel_19repair_delta_kossel_23repair_delta_kossel_22repair_delta_kossel_21repair_delta_kossel_20

Final considerations?

These anycubic delta printer is above my expectations. It can print really well. The frame is light, soo light that it has some really evident weak points. But the light frame and structure is  one of it’s advantage. It’s so light that it can go quite fast. Really fast for a cheap printer like this.

Well it not like the TEVO little monster that I saw on the internet (yeah I know there is some issue with TEVO in these period, but I like the design of the Little monster). Just to be clear I don’t have one Tevo Little monster, I don’t have ever see one of that in real life, just look at the printer online.

I will but a kit like these? I dont’ think so… I want a stronger frame. But I admit that it print well.

Updating my big delta 3d printer

In these period I’m really busy to prepare a lot of pieces to bring to a craft market in a country near the place where I leave.

So I decided to use the spare time between a printing (or an engraving with my cnc) to update my bigger delta printer.

That printer had 2 big waek point:

  • It does not use all the profile length. I missed somenthing like 15-20cm of printing height.
  • I don’t like black neoprene belt for big delta printer.

For the second point i switched to white polyurethane gt2 belt. 6mm wide. They are stiffer than the neoprene black belt. And I love them. I’m currentply use 15mm HTD 3M Polyurethane belt for my CNC, and they are amazing.

white gt2 belt
white gt2 belt

For the first poin I have moved the cealing of the printer as high as I could.

big_delta_update 01big_delta_update 02

Now I have about 53-54 cm between the nozzle and the glass bed :)

Bigger CNC is now opertive

Sorry, this entry is only available in Italiano.

Fox shaman mask 3d printed wearable

Sorry, this entry is only available in Italiano.

Bigger CNC timelapse assembly

Bigger CNC Project so far WIP

Sorry, this entry is only available in Italiano.

DIY shield for a weight scale arduino: BilancIno

One of my old job was a BilancIno. A weight scale made with Arduino. My parents need a junck-cheap weight scale. We have already bought a couple of really china weight scale… but the board of the weight scale keep to blow up…
So I replace the old dead board with an arduino.

The circuit was made with a bread board… it works… but it was a pain in the ass…

You can see it in the next photo…

old wiring... a pain in the ass... a completely mess

old wiring… a pain in the ass… a completely mess

So I decided to made one with a pcb using my cnc :D

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LCD box for my mini delta

I was annoyed by my naked LCD on my mini delta 3d printer…

Lo stato attuale dello pannello LCD... Troppo scoperto...

Lo stato attuale dello pannello LCD… Troppo scoperto…

So today I designed this little box for my LCD :D

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cnc etching pcb

i have just ordered some single side pcb copper and they will arrive tomorrow :)

But in the mean while I want to do some more test before do the final job on the pcb board. I have some spare melamine chipboard at home. The melamine will be quite good to do some test. Better than the MDF for sure…

The result was really good for me

PCB test for an arduino shield. Made by CNC

PCB test for an arduino shield. Made by CNC

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Carriage test for new wheel for future project

Test for a new carriage. I’ll goingo to use these new orange wheels for my new project (to rework my big delta maybe and for my bigger cnc)
Orange wheel test 1 Orange wheel test 2 Orange wheel test 3 Orange wheel test 4

 

work in progress.
So many things to test :D

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