Project Bondtech Extruder

Topics around mechanical design, controller and electronics. Mods & hacks welcome.
socke
Posts: 229
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Re: Project Bondtech Extruder

Postby socke » Mon Nov 13, 2017 11:09 am

There is a written document on this page: http://www.bondtech.se/en/docs/

AR_LA
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Re: Project Bondtech Extruder

Postby AR_LA » Wed Nov 15, 2017 7:03 pm

Not for the new dual direct drive kit though. The PDF installation is for the mini/Bowden setup.

socke
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Re: Project Bondtech Extruder

Postby socke » Fri Nov 17, 2017 10:06 am

Here is the manual, I've got from Martin:
Bondtech DualDirect assembly V1.0.pdf
(1.17 MiB) Downloaded 88 times

Maybe it's not the latest version - so just ask him if you have doubts...

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jetdillo
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Re: Project Bondtech Extruder

Postby jetdillo » Sat Nov 18, 2017 8:03 pm

socke wrote:Here is the manual, I've got from Martin:
Bondtech DualDirect assembly V1.0.pdf

Maybe it's not the latest version - so just ask him if you have doubts...


Hmmm. Mine arrived pre-assembled, but this is useful background info.

Do you do the pin-swap for both motor cables ?

How much should the two spring-loaded screws on either side of the Bondtech be tightened down ?

Thanks!

Jetguy
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Joined: Tue Mar 22, 2016 1:40 am

Re: Project Bondtech Extruder

Postby Jetguy » Sat Nov 18, 2017 9:04 pm

No, you only do the pin swap when you find the motor rotating the incorrect way. Test first, then decide if it needs changed.
Just tight enough that you can still push the lever by hand and release the filament.

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jetdillo
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Re: Project Bondtech Extruder

Postby jetdillo » Sun Nov 19, 2017 5:45 am

I had to flip the pins on both cables around, but was able to get it to load and unload PLA w/ out any problems.

Now the carrier assembly shudders up against the Y end-stop at the home position like it can't find home.
I didn't have a problem with this with the old extruder block though. Are there X/Y limits I need to adjust in the firmware ?

On further inspection it seems like the lever broke off the front Y limit-switch, but I haven't found any metal bits in the cabinet.
(Maybe it never had one ? )
20171118_212639_HDR.jpg

Jetguy
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Re: Project Bondtech Extruder

Postby Jetguy » Sun Nov 19, 2017 3:58 pm

It definitely should have a lever, otherwise the little target switch actuator must be perfectly aligned to the screw on the carriage that hits it.

No, there are no soft limits or offsets to adjust. This is pure and simple hardware failure to trigger an endstop during homing.

Jetguy
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Re: Project Bondtech Extruder

Postby Jetguy » Sun Nov 19, 2017 4:01 pm

It definitely should have a lever, otherwise the little target switch actuator must be perfectly aligned to the screw on the carriage that hits it.

No, there are no soft limits or offsets to adjust. This is pure and simple hardware failure to trigger an endstop during homing.

Ignore the wording on this link, Raise 3D setting up the store just copied an existing page for new items as they added them.
This actually is a limit switch link.
https://www.raise3d.com/collections/acc ... ssembly-v2
Endstop_Board-1_1024x1024.jpg

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jetdillo
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Re: Project Bondtech Extruder

Postby jetdillo » Tue Nov 28, 2017 12:15 am

Jetguy wrote:It definitely should have a lever, otherwise the little target switch actuator must be perfectly aligned to the screw on the carriage that hits it.

No, there are no soft limits or offsets to adjust. This is pure and simple hardware failure to trigger an endstop during homing.

Ignore the wording on this link, Raise 3D setting up the store just copied an existing page for new items as they added them.
This actually is a limit switch link.
https://www.raise3d.com/collections/acc ... ssembly-v2
Endstop_Board-1_1024x1024.jpg


Ordered and installed!.
That seems to have done the trick, although I've noticed that the lever-end is a bit shorter than the one it replaced.
It homed okay in the couple tests I did, so hopefully that's taken care of.

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jetdillo
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Re: Project Bondtech Extruder

Postby jetdillo » Tue Nov 28, 2017 12:53 am

Just wanted to drop a note here as well that after weekend's work and help from the fine folks here, I now have an XYZ Calibration cube in my hands, fresh off the build plate and extruded from my brand new Bondtech!
Pics here in the User Gallery forum:
viewtopic.php?f=5&t=4904

I'm sure this is not the end of tweaking and fiddling, but it's encouraging to hold(and squish) visible progress between my fingers :)

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JohnSays
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Location: Saint Petersburg, FL

Re: Project Bondtech Extruder

Postby JohnSays » Tue Nov 28, 2017 6:32 pm

That video is spot on. Just follow it. If you run into problems, this thread will have the answer somewhere.
- John
2 Raise3D N2 Duals, V2 nozzles, Bondtech BMGs, and adjustable table

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jetdillo
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Re: Project Bondtech Extruder

Postby jetdillo » Tue Nov 28, 2017 10:22 pm

A few other notes:
The compression between the two gears in the Bondtech should be rather light in comparison to something like PLA or ABS or whatever. If you tighten it down too much, it will kink, particularly if you leave it loaded when you're not using it.

Pre-heating the bed and the nozzle under "Tune" vs. letting it heat up in prep to print with the filament loaded seems to cause the least problems.
So far, this workflow has generated good results for me:
1. without filament loaded, pre-heat the bed and nozzle under the "Tune" settings.
2. Once your desired temp is reached, load your flexible filament like you normally would from the "Utilities" panel.
3. queue up your print.
4. After the print has completed:
-Unload if you are finished with the filament. It may kink or crease otherwise.
-Select "Add to queue" instead of "Done" from the Success menu on the front panel to print again.
5. If you get a jam/clog when trying to unload, pull on the filament. It's stretchy enough that under tension and with the gears rolling, it might snap back into shape along the path and come out. If you pull too hard and it snaps, unscrew the side panel that contains the outer gear and try to tease the filament out with a pair of tweezers. I had to work it a bit here and there, but it did kind of sproing out of the pathway and then I was able to pull it out of the hotend through the throat and out the side. I trimmed the filament, reloaded and it dispensed from the nozzle okay and I was went on to print robot tires w/ the TPE after that.

Basically, keep the filament going as long as you're going to be printing w/ it. Unload if not. The more it's kept in motion, the less likely it's going to be to move out of the feeder mechanism.

AR_LA
Posts: 248
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Re: Project Bondtech Extruder

Postby AR_LA » Tue Jan 09, 2018 4:16 am

I just tried installing my dual direct, and it looks like it's not going to happen without a ton of rewiring, or making a new little holder for the breakout board. My breakout board doesn't fit in the bondtec little shield, and both the heater/thermocouple, and the fan wires are much to short to fit in the new configuration they show.

And now that my printer is apart, I can't exactly quickly print up something to fix it. Super frustrating.

Iamkar33m
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Re: Project Bondtech Extruder

Postby Iamkar33m » Tue Jan 09, 2018 7:22 am

AR_LA wrote:I just tried installing my dual direct, and it looks like it's not going to happen without a ton of rewiring, or making a new little holder for the breakout board. My breakout board doesn't fit in the bondtec little shield, and both the heater/thermocouple, and the fan wires are much to short to fit in the new configuration they show.

And now that my printer is apart, I can't exactly quickly print up something to fix it. Super frustrating.


I have a dedicated standby printer for fixing my production machines. It's a cheapy little Monoprice Select Mini v2, but it's certainly paid itself off many times over.

AR_LA
Posts: 248
Joined: Mon Mar 21, 2016 8:41 pm

Re: Project Bondtech Extruder

Postby AR_LA » Tue Jan 09, 2018 5:05 pm

That’s a good idea. I zip tied the breakout board on, wrapped in silicone, it’s working but I can’t use the back inch of the build plate.

I’ve modeled an adapter that will let me keep that board in the original configuration, just need to fine tune the hole placement. I have no interest in redoing all the breakout board wires just because someone decided it would look cool to turn it 90 degrees

Edit: added my holder for the breakout board. It’s basically in the same position as it was with the older bondtech extruder, and still has clearance over the frame of the printer in the back. It’s a very simple design, and just uses 2 heatset M3 inserts.
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