The only sifu here is altan I've never gotten that print problem, so my guess is bridging, but if you've seen it before than maybe you know those problem better than me.

Those bracket, i've seen them locally for really cheap prices. I just cant recall where T.T

the bronze bushing is a good idea i think. A few ppl tried them and they are really quiet compared to LM8UU. The problem is u need good tolerance for both bushing and rods.

This post has been edited by izzudinhafiz: Mar 23 2016, 09:44 AM

i'll add bronze bushing to my cart already

another alternative is IGUS bearings. Altan mentioned it 20-30 posts back. You should give it a look.

yea, i read alot positive review about igus bearing, maybe i list it for upgrade if i didnt satisfied with bronze bushing

im still looking stepper motor for my extruder, can you suggest 1 for me

direct drive or wade extruder design?

Direct drive you need to get some beefier stepper if you want high speed extrusion. the 50mm+ versions (body length) with more than 70oz-in of holding torque. although you can get away with smaller steppers but you wont be able to push 70+mm/s extrusion. The higher the extrusion rate, the higher the backpressure in the nozzle, the more holding torque is required.

Wade design, you can get blomker's stepper motors. RM 50 i think or around that. its the smaller 35mm versions because the wade design is a gear reduction system.

I've tried both, i prefer the simplicity of direct drive (and lower mass of the extruder!). But the steppers are slightly more expensive.

P/S: Stepper motors loses more of its holding torque the faster it spins.

This post has been edited by izzudinhafiz: Mar 23 2016, 12:11 PM

Direct drive i think coz i didnt like the printed gears on the wade design

The printed gears that altan supplied me were amazing.

Well for the direct drive just search for some 70+ oz-in steppers and you should be good. Do note the extra size of the stepper in your design tho. Its still NEMA 17 but its slightly longer.

ok thanks for the info, lets the searching begin

Thanks for calling me sifu but you sound more of an expert on the topic here

Challenge yourself with Bowden drive! You can use the largest NEMA motor you can find as your extruder motor and not worry about weight. Only thing you will need to worry is: cooling the stepper motor and stepstick, ensuring the drive gear tooth is clean and sharp, maintaining a high enough extrusion temperature (about 250+ deg C for PLA), tons of cooling on the end effector and hotend, frequent PTFE tube replacement (inside the hotend), and lots more nozzle cleaning.

The headache of Bowden drive. Experimenting with it now for my dual extruder setup. I have to tell you. I am no fan of the Bowden extruder setup

Same here, no success until now. I had mine working for a while and was excited when I started printing. Before it even reach halfway through the print, a lot of problems occured and those concerns I mentioned above are things I have experienced with Bowden extrusion.

There are a lot more I had not considered for the Bowden setup, so I do plan to try it again with a different setup once I complete a printer with good ABS support. I think ABS is ideal with Bowden due to the low coefficient of friction unlike PLA.

im using bowden setup currently with my prusa i didnt has any problem execpt the banding

hahaha look like mr.posman forget my parcel, on the site it stat that it on delivery process but mr.posmen just deliver letter only today on my letterbox

huh, my main problem is high friction. i think the coupler is grabbing on the filaments. Do you have the same problem?

AHA. Bowden sifu pls help me I can not get it to work. Too much friction!

Which delivery service you use? Ordinary or courier? It could be on the way to another post depot. If its china post you might want to wait for tomorrow or the next few days. Normally I don't rely on the reporting unless the package does not arrive after 4 weeks or has arrive but did not received.

wish i can help but i never has any problem with my extruder so i never research any problem regarding friction for extruder

You mean the quick fit tube connector?

from china using free shipping service i guess mr.posmen delivery it using motorcycle or bicycle not in a hurry anyway, like last week it stat delivery process and the parcel arrived the next day so i hope i can received it tomorrow

If you guys order something from china how long do it take for you to received it? for me it took 2-3 week sometimes 4week to kuching, usually it stuck on klia for 2-3 days before they send it to kuching hubs

what vref do you guys set for Drv8825 stepstick?

Yeah the quick fit tube.

Takes me 3-4 weeks in KL too.

Vref? Hehe. pusing counterclockwise until motor starts to lose step. then 1/4 turn clockwise although if you want to set Vref, you need to check your current sense resistor value. Different vendor put different value. Dangerous just to use other ppl's number