Orbiter 2 extruder mounting for Smart effector with Magball arms

Fred-Y

@bberger Have you redesigned a LGX lite mount for the Smart Effector?
I spend quite some time lately on pushing my SR with a flying LGX Lite so I would like to compare with a direct drive.

bberger

@fred-y I don't have a solution that I'm happy to share tbh (80mm rod spacing adapter + a pain in the butt mount for the LGX lite).

That LGX Lite is a pain to mate to the smart effector and any adapter I had thought of. The pain of a need to screw them from the bottom is real.

BUT: on the SR I suspect you could probably get away with this without losing print volume:
https://www.thingiverse.com/thing:5255358

It doesn't print really well though and needs supports.

Fred-Y

@bberger Thanks for the link, I didn't see this one the other day when I did a search.
On my other printers I have a 2 parts mount for the LGX Lite because of these screws on the bottom; Maybe I should be looking at doing the same or just give up.

On a side note, the other day I realized something about how we mount the extruder on the SE - I have not an expert on kinematic / force but with the extruder mount attached on the effector we apply the filament pressure on the 3 screws.
When doing high speed printing this pressure is fairly high.

I was wondering if we could be looking at reusing the thread from the hotend by this way there is no (or very little) pressure on the PCB but I'm worry about the impact for the probe.
The 3 holes on the PCB could just be used to stabilize everything.

I'm just sharing the idea ... what do you think?

Adrian52

Just to add that I have updated the orbiter 2 mount, posted at https://www.thingiverse.com/thing:5402227
I have made small changes including thickening the top mount and extruder mount, and kept the 55 mm magball spacing. I have recently started using a revo micro extruder, so have included a part cooling duct for that.
The revo seems to have a higher melt rate than the v6 I was using previously, so I have been able to print at 250mm/sec, with 300mm/sec travel speed, with very good results.

bberger

@fred-y though about exactly that multiple times. Problem is that it's pointless with 55mm magball spacing as you need some real nasty vertical offset and tilt to jot collide with the arms which then puts a lot of direct force onto the hotend itself.

Adrian52

@bberger I find that the 55mm spacing (which I wanted to use to avoid changes to carriages) works well with a 12mm extension - the extruder can be horizontal (filament path vertical). Here is my setup in the furthest -Y position, where the arms are closest to the extruder motor.

The gap between the extruder platform and the top of the hotend is about 1mm:
, giving the shortest possible filament path. I would have thought that as the downward force during extrusion is symetrically distrubuted, the strain on the effector/hotend should not be a problem.

These puzzle pieces, which are about 40mm long and 14mm high, were printed at 250mm/sec, with 300mm/sec travel.

The pieces fit together to make and Escher solid:

We have just had a jubilee here in the UK - hence the red white and blue. The pieces have to be very precise to fit together with no gaps.

Adrian52

@fred-y Thanks for this idea - it seems to work. I made this:
alt text
using the two holes on the motor side of the extruder. This leaves a nice gap on the molex connector side for the plug to fit properly.
This is how it looks in situ:

I am using the default sensitivity on a v3 smart effector, and found that it needed an extra -0.04 on the probe offset. Seems to work well though - a 19 point G32 gave a 0.010 fit.

The mount pictured was printed with the new setup - I was fine tuning the thread diameter - 12.3mm was good for me. I havent pushed the new setup yet - seems promising though.

Fred-Y

@adrian52 That's really nice!
You've done exactly what I was thinking about, I'm happy to know it works.

I will definitively spend a little bit of time on Fusion360 this week to try something for the LGX Lite on either my SR or Predator.
What is pitch of the thread on the heatsink?

Adrian52

@fred-y Its 1.5mm.
You do need to be able to rotate your hot end - would be difficult with a v6 where the heater block really has to be aligned with the part cooling fan

bberger

@adrian52 said in Orbiter 2 extruder mounting for Smart effector with Magball arms:

@fred-y Its 1.5mm.
You do need to be able to rotate your hot end - would be difficult with a v6 where the heater block really has to be aligned with the part cooling fan

It actually depends. The earlier versions that shipped with the metal nut had a fine pitch..

vapvap

@adrian52 Wow! Looks solid. Is this design available for download somewhere? Or is it an "alpha" version?

tecno

I have this on my Big Delta.

dc42

Does any of you have a view as to how much the size of the Smart Effector should be increased to allow the Orbiter 2 to be mounted directly on it?

tecno

@dc42
Will you want to keep 55mm c/c on balls or go a bit wider there also?

dc42

@tecno said in Orbiter 2 extruder mounting for Smart effector with Magball arms:

@dc42
Will you want to keep 55mm c/c on balls or go a bit wider there also?

Go wider.

tecno

@dc42

Good, like that approach a lot. You should also have a look at Phaetus 4-screw mounting of the hotend.

jay_s_uk

@dc42 yes, definitely look at supporting mounting a dragon or dragonfly hotend

tecno

@jay_s_uk @dc42

Not via adapter as I have today! We must get rid of the E3D style big hole that can not lock the hotend!

weed2all

This is my take for direct extruder sherpa mini

[url=https://ibb.co/jh3q5yK][img]https://i.ibb.co/zsPC5Xc/20220717-113347.jpg[/img][/url]
[url=https://ibb.co/3Mvh1hX][img]https://i.ibb.co/P9MCxCp/20220717-113353.jpg[/img][/url]
[url=https://ibb.co/HGjsNyM][img]https://i.ibb.co/r5VSbhL/20220717-113358.jpg[/img][/url]
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weed2all

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