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Anet A8 Hold Down Bracket

by freemark Jul 22, 2016
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It seems to not work on my Anet A8. If i put in place this brackets there's 1.5 mm of air under the piece.

I can only think of 3 possible reasons for this. You printed the version designed for the A6, your printer is not calibrated, or they changed the design of the A8.

well. i printed the 2nd on the list of course (The others has the A6 diciture in the name so....). I think my printer is fine because the other prints are fine so....i have the 1.5 version. I can see some little changes in the structure and in the design (compared to some videos i found online). Well, no problem, i just need to print a little rectangle to cover the small gap

Does this does a notable effect on the prints? i just printed them and started my first print with them.
I'm i going to notice anything ?

It depends on your print. If you're printing something tall, with a lot of detail, and/or higher speeds, you should definitely see a difference. On an easy print it may not be noticeable. The other advantages are that you can move the printer without throwing it out of alignment, and you will not need to level the bed as often.

Thanks you! I just finished building my A8. this is the very first thing it is printing right now. To my big surprise it seems to be working and turning out usuable!

What is the best infill%?

I would go with at least 25%

Unfortunately these interfere with the A6 bearing blocks on my machines.

Knock off 2mm or so to clear.

Thanks for the feedback, but could you be more specific about which dimension needs to be reduced by 2mm?

At the very top of the strap it hits the bearing blocks. The A6 has the smooth rod directly over the threaded rod. If you cut the top of the strap down 2mm it might be enough. I like the design.

I printed out the A6 version and they interfered with the bearing blocks. Also - Is the point of these brackets to stop shifting from left to right? I noticed that they allowed for movement up and down.. Not as if the printer should be moving up and down but I'd like to see these fit snug all around. However - thank you for sharing your design !!

The point is to mount the printer to a rigid surface so the frame does not move at all. The A6 version is based on other peoples' comments since I do not have an A6 to test it. Can you measure the distance from the surface to the top of the threaded rods? And also the distance between the threaded and smooth rod above it?

So the threaded rod measures 7.4 mm thick. From surface to bottom of the threaded rod is 20mm. The distance between the threaded rod and hotbed linear bearings is 8mm.

Ok, I uploaded a modified version. Thanks

Had them mounted for almost 8 months, but they started breaking.
Printed at 35% infill in PLA, sliced using Cura.

Very good upgrade, I mounted to a rather heavy wooden board. 18 mm. Beneath this board I did mount rubber AV mounts. Now all the vibrations stays in the printer. This result in a better printing. The rubber mounts are normal standard buffers, diameter 25 mm, height 18 mm, with M6 bolt at one side. Perfect.

Best upgrade yet, thanks for posting this.
I mounted my printer to a piece of 3/4" particle board I had in my workshop and the printer runs nearly silent and the quality of the prints is amazing.

Bracket for Anet A6 should be 1mm lower, than it will be perfect.

Thanks, I'll upload a modified version.