Have a couple of screwthread-worn-out pulley’s. I tried to make a new third hole but the wall is to thin to cut usefull thread.
I was wondering, where do you get your pulley’s for a reasonable price? I can buy them for 8 euro a piece, so that’s 64 euro for a set of 8 pulley’s with a lousy quality!
Thanks for your response…
Support website of Velleman?
Dylan
[quote=“autopaga”]Is these pulleys fit to k8400?[/quote]Nope, Vertex pulleys have 19 teeth…
You can print…but it´s not easy to get a good qualität
Which material you did use? ABS?
The screwthread for the set-screws, I don’t think it prints properly or does it? Or is the set-screw able to fasten itself in the plastic?
Thanks
Which material you did use? ABS?
The screwthread for the set-screws, I don’t think it prints properly or does it? Or is the set-screw able to fasten itself in the plastic?
Thanks[/quote]
You only use ABS. if you adjust the pulley and the belt punctilious!!, the print is better as the original pulley.
you can not destroy the pulley because he is with Bolt and nut (3mm)
Ok, thanks, I am going to try this. Didn’t know there’s a nut inside, that changes a lot.
I do have cutted belts already, but why do I need this?
Because the belt tensioner - it’s important that all belt have the same tension…and some people use really the wrong belt tensioner - it’s often only for the eyes but it don’t work on print
@sdvd i bought mine at beltingonline.com/19-tooth-t2-5-pulley-4879 and in this topic u can find a little more info on pulleys.
About those printed pulleys while u where at It: you better added a shim between the belts… I have something similar going on on one of the axles and I must say it moves 10 times smoother than having those belts grind into each other…
Kind regards
JeAfKe
@Jeafke
Thanks for the information. For me it’s not about grinding but worn out screw-thread because I disassembled/assembled the rods a few times.
And once I would like to have pulley’s centered on the rods too 
Yeah the belt grinding fixes itself after a while… Actually it was totally gone at one point. But I had some spare time and wanted to try this, that’s why I only did one axle so far… But comparing both sides that side runs noticeably smoother and less jerky. Biggest drawback are that the grub screws are in a atypical place… They are drilled between the tooth notches… Although this makes them less space consuming as the stock ones…
Kind regards
Jeafke
If you fix and trim the belt exactly it works excellent with printed pulleys
And it is better you use this because you don´t get problem with X/Y Axis after trimming the Belt.
after trimming the belt you fix the new screw inside and you dont have a problem with the axis
Hi Jansinger,
I printed the first pulley with PETG (30% infill) and it looks very well. But the 8 mm rod fits very thight and I can’t move it by hand, so maybe I have to scale a little.
And where did you get those small square M3 nuts? On the internet I find several square nuts but I don’t think they fit in the small hole in the pulley.
Thanks
Might just dremel the crap out of a standard m3 nut? Clamp it with a vise-grip and make it square yourself? Just a DIY idea.
Kind Regards.
JeAfKe
Thanks Jeafke, I printed the pulley again in ABS instead of PETG. ABS prints more accurate and it turned out that with some force a standard nut fits in the square hole. I do have a few very nice pulley’s now…
Yes, you can use standart nut (DIN 934) - if the 8mm is not exacly 8mm you can use a 8mm drill (Wood or Metal) and open it - also you can use 8.1mm drill if you have - but draw slow.