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JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers




5mm tail spindle shafts for my stunt RC Helicopters usually have tight tolerances. Depends on how long you need the shaft.

Is this for your main gear shaft? I believe that it is not solid and tapped through.

Like this:

https://www.amainhobbies.com/sab-steel-5mm-tail-spindle-shaft-sabh0329-s/p275071

interesting. Need ~50mm length. I will keep that on my list to investigate. If you have a 105 bearing, see if it fits.

oooh just missed it. I grabbed my spare and the shaft is 45mm long. Its tapped on both ends but is solid the rest of the way. Its hardened steel weighing in at 3.3 grams by itself.

The spindle bearings it uses are not marked themselves but the dimensions are 5x10x4.

Here is pic.

No, that will work great. 45mm is the minimum. I’ve been recommending a bit more for early testing. The tapping could be handy as well for any needed extraction. Those bearing dimensions match 105, so I think You are good to go. Good find.

Publié : 09/04/2018 9:30 pm
raspeitia
(@raspeitia)
Eminent Member
Re: seeking advanced testers

Just other pics for the shaft and bearing.

Publié : 13/04/2018 3:26 am
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers

perfecto. Ordered.

Publié : 13/04/2018 3:59 am
jonathon.b
(@jonathon-b)
Estimable Member
Re: seeking advanced testers

If youre interested 3.2 firmware just changed to RC1!

Publié : 13/04/2018 8:09 pm
gregsaun
(@gregsaun)
Trusted Member
Re: seeking advanced testers


If you read my first post, I started with a blank sheet and some project goals. I ended up with a Titan-like solution, which makes sense since I believe they had some same goals.

Ignore cable routing.

BF6DC48B-D8B7-4339-8C1C-046FB1016564.jpeg

D0DBF219-1D78-4257-BEE2-165A07F0A8BB.jpeg

This is an awesome work JLTX! do you have pics of latest version?

I wish I had time to test you extruder...

Bear Upgrade Frame for Prusa

--- thingiverse.com/pekcitron --- patreon.com/gregsaun --- ekunn.com

Publié : 18/04/2018 12:30 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers



If you read my first post, I started with a blank sheet and some project goals. I ended up with a Titan-like solution, which makes sense since I believe they had some same goals.

Ignore cable routing.

BF6DC48B-D8B7-4339-8C1C-046FB1016564.jpeg

D0DBF219-1D78-4257-BEE2-165A07F0A8BB.jpeg

This is an awesome work JLTX! do you have pics of latest version?

I wish I had time to test you extruder...

Thanks. I need to get some more pics up. Been busy at work lately. Others are testing now so I’m optimistic.

Publié : 18/04/2018 1:15 pm
raspeitia
(@raspeitia)
Eminent Member
Re: seeking advanced testers

Thought this might be a fun picture for reference. The shaft I put up pics for the extruder, get used on this (see attached pic).

Its the shaft for the tail blades just above my head.

You can say your extruder is flight ready! 🙂

Publié : 18/04/2018 4:19 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers



If you read my first post, I started with a blank sheet and some project goals. I ended up with a Titan-like solution, which makes sense since I believe they had some same goals.

This is an awesome work JLTX! do you have pics of latest version?

I wish I had time to test you extruder...

When are you going to make time? 🙂

Publié : 19/04/2018 2:08 am
chris3030
(@chris3030)
Trusted Member
Re: seeking advanced testers

I didn't see it mentioned, but is it possible to move the extruder motor off the hot end assembly altogether like some other printers do it? Would cut your weight in half right away and would prevent heat transfer to the filament.

Publié : 19/04/2018 6:15 am
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers


I didn't see it mentioned, but is it possible to move the extruder motor off the hot end assembly altogether like some other printers do it? Would cut your weight in half right away and would prevent heat transfer to the filament.

Yes, that would be a Bowden extruder, of which I am not a fan. Causes too many other problems, imo. But it is way lighter. Delta printers go this route (which is where I got burned on Bowdens).

Publié : 19/04/2018 2:17 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers


Thought this might be a fun picture for reference. The shaft I put up pics for the extruder, get used on this (see attached pic).

Its the shaft for the tail blades just above my head.

You can say your extruder is flight ready! 🙂

Damn that's a big blade! I want one. 🙂

Publié : 20/04/2018 5:13 am
gregsaun
(@gregsaun)
Trusted Member
Re: seeking advanced testers




If you read my first post, I started with a blank sheet and some project goals. I ended up with a Titan-like solution, which makes sense since I believe they had some same goals.

This is an awesome work JLTX! do you have pics of latest version?

I wish I had time to test you extruder...

When are you going to make time? 🙂

Well, have to finish my X axis and extruder rework first! 😀

Bear Upgrade Frame for Prusa

--- thingiverse.com/pekcitron --- patreon.com/gregsaun --- ekunn.com

Publié : 20/04/2018 1:52 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers

I have a handful of testers printing with the new extruder, so it is definitely viable. I am moving to alpha2 phase of testing, so looking for a few more volunteers to identify robustness issues and testing other features.

Publié : 27/04/2018 3:22 pm
tfca
 tfca
(@tfca)
New Member
Re: seeking advanced testers


I have a handful of testers printing with the new extruder, so it is definitely viable. I am moving to alpha2 phase of testing, so looking for a few more volunteers to identify robustness issues and testing other features.

I noticed that the parts updating has stopped, I take it the current build is working well? 😀

Publié : 15/05/2018 11:53 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers



I have a handful of testers printing with the new extruder, so it is definitely viable. I am moving to alpha2 phase of testing, so looking for a few more volunteers to identify robustness issues and testing other features.

I noticed that the parts updating has stopped, I take it the current build is working well? 😀

Yes. I am waiting for some feedback from alpha2 testers, then I will move to beta and open to anyone crazy enough to try it. 🙂 Watch for b1.

Publié : 16/05/2018 4:36 am
sasha.z
(@sasha-z)
Trusted Member
Re: seeking advanced testers

I notice a bunch of b3 parts just got printed. Might be good to update the print table to help folks wade through the quite-large number of parts and revisions.

I just ordered the necessary metal bits for the Skelestruder. I'm also printing gregsaun's x-asis and extruder (though out of ABS and PC rather than PLA and PETG). Longest lead item is the hollow shaft.

Publié : 29/06/2018 5:49 am
JLTX
 JLTX
(@jltx)
Reputable Member
Topic starter answered:
Re: seeking advanced testers


I notice a bunch of b3 parts just got printed. Might be good to update the print table to help folks wade through the quite-large number of parts and revisions.

I just ordered the necessary metal bits for the Skelestruder. I'm also printing gregsaun's x-asis and extruder (though out of ABS and PC rather than PLA and PETG). Longest lead item is the hollow shaft.

stick with b2 and earlier for now. I have some folks testing b3.

Publié : 29/06/2018 7:12 am
DevDoc
(@devdoc)
Estimable Member
Re: seeking advanced testers

Add one more Skelestruder to the list. I am testing my first one now, and admittedly I printed everything in PLA so we'll see how long she lasts. Version two is already printed and waiting for when and if the original one fails. I have both PETG and ABS part variants on the ready. So far in limited test prints, everything looks great. The pancake stepper hasn't skipped a beat and I have it toned down to 24 power as opposed to the default 30 in the TMC setup. The motor is running at about 36C and I am not stepping up the speed to see what she can do. Crossed fingers. Thanks, JTLX for your very interesting and innovative design. Please ignore wiring, as it is a work in progress.

Publié : 14/08/2018 2:54 am
tg73
 tg73
(@tg73)
Membre
Re: seeking advanced testers

I was going to upgrade to official R3/B7, but then saw jltx post about the new indirect filament sensor design - and so I discovered Skelestruder. So I'm going to upgrade to Skelestruder instead of R3/B7. I've ordered all the required vitamins. A couple of questions/notes:

1. What does the Plate column mean in the parts table?
EDIT: Answer from question posted elsewhere:Plate means to slice multiple parts at same time so they print together. This has advantages and disadvantages.
2. Has anyone found a supply of the wire brush wheel for delivery to the UK? The vast majority I've found come with a pre-fitted shank, or have a hole well below 3mm, and are 22mm rather than 20mm overall diameter.

Publié : 19/09/2018 10:27 am
ceryen.t
(@ceryen-t)
Eminent Member
Re: seeking advanced testers

Stock LDO is 35 N-cm. My gearing is 3.5:1 so a pancake with 10 N-cm should have roughly the same torque. I haven't had trouble yet with my 14 N-cm. I'd be curious to understand the 18 N-cm suggestion. I'm sure there is good info to be had.

Supposedly the stock extruder motor is an LDO-42STH38-1004A. According to these specifications, that has ~5 kg-cm of torque, which would be ~49 N-cm of torque

Don't know how much that matters, just wanted to put the information here

Publié : 03/10/2018 4:46 am
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