Anycubic Kossel Rods Upgrade

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Kossel | Upgrades

If you really want to get rid of the ghosting, new lighter effector and lighter, more precise rods are the way to go.
Original rod with joints weights about 21 grams.
This upgrade rod weights only 9 grams even with the joints.

Step 1: Order new upgrade parts

We have chosen  6×4 mm rods as a compromise between the stiffness and weight.
If you want to go lower with the weight, although the difference will be small, you can use 5×3 mm rods and M3/3 joints.

Carbon rods 6x4x240 mm

We have choosen these high quality carbon rods. Please select OD 6 ID 4 240

BALL LINK V1 TYPE, 7 MM DIA, M4/3 SHORT

These lightweight joints help with ghosting and corner overshots. Please buy 2 packs - 2x 6 pcs. These joints have a 7 mm diameter hole for rods so there will be a 0.5 mm space for epoxy glue. You can get rid of the original brass spacers with these joints.

M4x20 set screw

Order this set of M4 set screws or get it at your local shop. You will need at least 12x M4x20 mm of them.

Loctite 3450 epoxy glue

Buy this or a similar epoxy glue in your country.

Step 2: Print this rod tool

270 mm rod tool

Download these stl files for a rod tool (rod holder). It really helps with gluing the joints to the rods. This model was created by Robert Schmiedt, so you can thank him for his design.

Step 3: Prepare all parts.

As you can see in this pictures, the rods are very well packed.
Prepare all parts and start with assembly.
I highly recommend using some degreaser on the set screws and inside of the rods, the glue will work better.

These joints with 240 mm carbon rods will be a little bit longer, so you have two options:
1) Loose some of the printable height and modify rod lenght in your firmware.
2) Cut the rods about 10 mm so the distance between the axis remains the same

Step 4: Glue it together

Please note that the pictures and description will be without using the rod tool, I did not have any working printer at the moment.

Insert the set screw into the joint, tighten it and leave at least 10 mm of the set screw outside.
Apply epoxy glue on the screws and into the rods.
Insert the screw into the rod and let the glue work.

Step 5: Glue the other end

Apply the same procedure on the other end and make sure that the axis are parallel.

Step 6: Install new rods

Install new rods thesame way the old ones were installed.

Step 7: Modify your rod lenght if you need to

If you need to modify your rod lenght, follow one of these guides:

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Step 8: Recalibrate the printer

I highly recommend recalibrating printer with delta calibration.

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2 Comments

    1. Weight, speed limitations.

      Using magnets which are really heavy and usually do not have enough force to hold together in high acceleration movements is not such a great idea…

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