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Anet A8 Improved X-belt Tensioner

by freemark, published

Anet A8 Improved X-belt Tensioner by freemark Jul 22, 2016

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Summary

This x-belt tensioner works with the original right side bearing block that came with the printer, so you do not need to print a new one. It also tightens against the x-axis rods instead of the right bearing block. This is to prevent binding along the z-axis when the x-belt is tightened.

Be sure to see the readme.txt file for more information on building and installing.

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Hi freemark! I like this design but how does heating the 4mm nut make it stay into the hex slot of the print? I'm new to all this so thanks

The slot is slightly too small. Heating the nut softens the plastic so it gives when you push it into the slot, then when it cools the plastic conforms tightly around the nut.

Thanks mate it worked beautifully! The nut went in alot easier than I thought.

You're welcome, glad it worked for you.

Comments deleted.

hey, i, super stoked to print this but before i do i was wondering if my belt would be long enough. Its already stretched and cut for my original setup? Did you need to get a new belt?

The belt will need to be about 4 in (10cm) longer, there's more info in the readme file. I did get a new belt, but because it was thinner and more flexible than the stock one. Having the extra length for this tensioner was a bonus. While you're at it, you might want to print a better belt attachment, like one of these: http://www.thingiverse.com/thing:1433295, http://www.thingiverse.com/thing:1685768 or http://www.thingiverse.com/thing:2016779

belt attachment part for Anet A8
by Simhopp
Anet A8 prusa-i3 X-belt holder
by Sjouke
X Belt holder part for Anet A8 and Prusa I3 only for GT2 Belt 1.3-1.4mm
by kiss1
Jan 12, 2017 - Modified Jan 12, 2017
Liberty_cnx - in reply to Schneiderg

j

How much does this improve print quality? I have already assembled the printer and have been printing for a while. Does the belt stretch and need periodic tensioning to keep the quality the same?

Yes, the belt will stretch over time. You get the best print quality when the belt tension is set correctly, not too loose or too tight, and this tensioner makes it much easier to adjust. Also, with the original configuration, tightening the x-belt will squeeze the z-axis rails toward each other which may cause binding. This tensioner eliminates that problem by putting the tension on the ends of the x-axis rods instead of the right z-axis bearing block. You can google for details on setting the correct belt tension.

In the second picture the part is shown with some bolts and some nuts. Does anyone know the exact ones shown there?

Look at the readme.txt file, it explains everything.

How did you get the M4 Nuts in there? The Holes are too small :(

4 ANSI Screw nuts fit in perfectly...

Dec 4, 2016 - Modified Dec 4, 2016
freemark - in reply to Instinct441

The instructions are in the Readme file. Thread the nut onto the screw, and hold the screw with pliers. Heat it up for a few seconds with a cigarette lighter, then carefully press the nut into the hole and let it cool. This embeds the nut so it doesn't fall out.

Why do you copy toolsons X-belt tensioner almost 100 percent and claim it to be yours???
Thumbs down!! At least add it as a remix!! Shame on you

Nov 14, 2016 - Modified Nov 14, 2016
freemark - in reply to steba

Sorry but you are absolutely wrong, this is 100% my idea and I designed it from scratch. I have no idea who toolson is, but if he/she made a similar tensioner it's only by coincidence. Shame on you for making unfounded accusations !!!!

Anyway, this design is too complex and doesn't make the belt tension adjustment easy. Two screws to turn and you can't use a scale to measure the tension.

lol. It's not even similar, it is just the same.
http://www.thingiverse.com/thing:1036871

P3steel 2.x - X-axis complete
by toolson

Now that you provided a link, I looked at the stl files and they are most definitely NOT the same, they are similar. But that doesn't matter because my design was done without any previous knowledge of the one you are referencing. I do not appreciate you coming here trolling and making false accusations, so please go away.

Who cares ? The idea is the same and not much to "invent" here. Problem solved more than a century ago when belts were made of leather :)

MKSA, just letting you know that I'm ignoring your comments since you don't have anything useful to say. Please take your trolling elsewhere.

I have THE RIGHT TO INFORM PEOPLE ABOUT YOUR INFERIOR DESIGN.
Too much JUNK in this world and naive people buying it !
You resort to personal attack instead of proving you are right.
Call it "trolling", not my problem. If you can't accept criticism, you are one step below ignorance.

Hi!
Is it ABS? If so, are the 3d model parameters already adjusted so as to consider post-print shrinkage? Or do you have to adjust the model scale before printing as per your plastic properties?

It's PLA, so you don't have to worry about shrinkage or dimensional stability. No scale adjustment is needed as along as your printer is calibrated. You will need to do a little post processing, see the readme file for details.

How do you install it?

You remove the existing Bearing and belt, Re-seat the bearing inside the slot of the tensioner might need to get a longer belt 1 meter is good thread the 2 screws in with bolts on opposite side (these tension the belt) and do your belt up again and tension it up.

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