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pefozzy

Greg's Wade Accessible Belt Drive Extruder, Rev2

by pefozzy Sep 8, 2014
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would this work for a budaschnozzle??

It should, since that is the hot end I use.

Did you print ABS or PLA?

ABS. PLA would probably work, but I'd be concerned about durability long term.

Have you tried using this as a bowden configuration, like the 00str00der? If so, do you use the same pulleys and belt for an 00str00der bowden or your current setup?

No, I haven't, but I would imagine it should work just fine. The only problem might be if your stepper can achieve high enough retract speed with the big reduction gear ratio.

I job seems to be upside down but I managed to flip it in SketchUp (I'm new to all of this). ;-)

However, I notice there isn't any built-in-support for the hinge that you often see (and to a lesser degree, the single bearing) so wondered what others have used to best manage this please?

I've only tried adding support using Repetier / Sclic3r but it seemed to overfill everything! ;-(

Cheers.

Tips:
1) you can rotate the part in Repetierhost, so you can put the appropriate side down on the build plate.
2) For the main printer block I usually print the part lying on its side, with the stepper motor mount side down on the build platform. Depending on your settings you should be able to print it without any support, and only have minimal cleanup.
3) if you do use support, you can adjust the support settings to minimize it- make a longer distance between supports, etc.

good luck!

Thanks very much for the prompt reply and info. ;-)

Yes, I turned the part so that the main flat part (the motor mount) was on the bed but I did it in SketchUp as I don't know how how to do it in Repetier?

My friend (I am using the MendelMax 1.5 I built for a friend to make my own) printed it again this morning and he says there is just some cleanup at the bottom of the drive side bearing and the drive side of the hinge. When we tried to enable support previously it pretty well filled it solid so we are unable to clean (all of it) out.

Could you recommend the settings that you would use in Repetier Host on that item please (as it takes 2.5 hours to find out if we have got it wrong again)? I think we followed a tutorial on the Net and set it to honeycomb with 5 mm spacing?

Also ... to make it eaier for others who may not have all the skills needed to deal with these sorts of things themselves, would it be better to offer the part / .stl already sitting the right way round and with the support block that you can just snap off like you often see on other extruders of this type? Like this:

http://www.thingiverse.com/download:33403

I am trying to print all the parts needed to make my own MM 1.5 and have most of the parts now but my friends MM kit came with a direct drive extruder so I can't easily duplicate that. I have already printed a geared extruder but like your idea of a belt drive and have all the materials ready to make my own hot-end to go with it (luckily I have a reasonable workshop with a small lathe etc). My mechanical skills are much better than my CAD / software skills. ;-)

Once I have my own printer I will have all the time to do experiments but at the moment I would just like to print the parts with the best results and the least cleanup (if it is possible). I am aiming for a complete set of parts like this as I already have a friend who is keen to build their own MM and he would also like to use your extruder. ;-)

My friend gave me a spare Nema 17 type stepper motor and I am going to try using a 16 and 48 tooth ally gearset driving a 6mm OD hobbed fitting on a 5mm shaft (I may turn that from some 8mm stock and / or turn 5-8mm adaptors for a 5mm shaft in the 8mm bearings. I felt I should use a 6mm diameter filament drive rather than an 8mm hobbed bolt as my gearing was a bit higher than yours or the geared extruders (3:1 v 4-4.5:1). Your extruder design gives me more room to play and provides better bearing support when the load on the shaft in the opposite direction to the geared versions.

Time will tell. ;-)

Thanks again ...

Is there any way you could post links to the large pulley and belt? I am having trouble finding them...

SDP/SI is also a good source...and you can download the CAD files from them. But the polycarbonate version is only $9. https://sdp-si.com/eStore/Catalog#

you can purchase the belt and gears from Terawatt industires: http://store.terawattindustries.com/77-00str00der-belt-driven-extruder.html#/00str00der_assembly_options-belt_and_gears_only/00str00der_parts_options-no_nema17_motor

otherwise you can try Mitsumi, Stock Drive Products, or e-bay. Good luck!

I noticed that there is a small hole on each side between the bearing cup and the cutouts for the nuts. I added a .5mm radius fillet to the bearing cup on each side before the nut location plane is created, and the holes went away. This is really cosmetic, but it was easy to fix since you posted the Solidworks files. Thanks!

Is there a Solidworks part file for the idler?

Sorry, I don't have a solidworks file for the idler- I've been using a .stl from the original Greg's wade gear drive extruder and I just haven't gotten around to modeling it in Solidworks.

Great extruder! I have made a little plug that sticks in the bottom of the extruder. Here is the link http://www.thingiverse.com/thing:483566

Question: Do you have a different file for the idler bearing specific for 1.75mm? It seemes like it may fir to flush for 1.75mm vs 3.0mm.

1.75 mm Plug for extruder

I just updated the extruder body to allow for more filament compression with the 1.75mm extruder body. If you try it, please let me know how it works!

You are probably right about the idler clearance for the 1.75mm version. I haven't actually tried the 1.75mm myself to check clearances as I run 3mm filament. If there isn't enough clearance I'll just shaft some material off of the side of the extruder to allow the idler bearing to extend far enough into the extruder. If I get a chance this morning I'll make that change and upload the modified .prt and .stl files.

Hi. Any chance for a 1.75mm version?
Thanks!

Sure, I just uploaded a version for 1.75mm filament. I haven't tried it myself- please let me know if it works or if it needs some adjustment.

Bless you! I'll let you know.