Flat cable and Bowden tube catching print  

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click
(@click)
Noble Member

Just a word of warning - it looks like that Robox cannot safely print big prints - high and deep at the same time. Flat cable and Bowden tube are hanging behind the head and when head is relatively high (5-6cm) and bed quite back (more than 9.5cm deep print) they hit the newly printed back wall.

Example of STL that cannot be successfully printed is attached here - along with pictured to illustrate it. Object is 15cm x 10cm x 7cm...

Any ideas how to enable Robox doing it - please share here. In the mean time I have raised a ticked with CEL and will post back any feedback from them.

In the mean time I was thinking of adding some kind of elastic band to pull Bowden tube up and something similar to flat cable (although I am worried that it might damage cable).

Also, flat cable is already held relatively far back from the head. If the same plastic plate is longer (pushing Bowden tube as well as flat cable to 15cm instead of 9.5cm away from the nozzles) that might help - although not sure if such a long plate would do and what it might case to head and extruder...

problem1.jpg
Problem2-area.jpg
Problem3-low-hanging-wires.jpg
Problem4.jpg
Quote
Posted : 06/12/2014 6:40 pm
click
(@click)
Noble Member

Good news I would like to share with you. CEL will be looking into this issue. I've got response during the week:

" We are working on a fix for this in future versions of Robox, and it will be backwards compatible with existing machines, so you'll be able to upgrade. We want to stiffen the FFC cable with a plastic part, so that it can only bend in one direction, ensuring it never goes below the level of the nozzles, and also support for the Bowden tube built into the current FFC support (the green 'arm' on the back of the X-carriage)."

I suggested that if parts can be printed - simple sharing stl file could help as well! Why not - we do have 3D printer, now, don't we? :)

ReplyQuote
Posted : 13/12/2014 4:38 pm
Therese
(@jakobthw)
New Member

Do you know if there is a solution to this problem yet? Any news from Robox? I have the same problem with my large prints.

ReplyQuote
Posted : 20/07/2015 9:18 pm
click
(@click)
Noble Member

@bhudson has posted this: https://cel-uk.com/forums/topic/cable-carrier-part-files-and-instructions/

I didn't get chance to try it out yet.

ReplyQuote
Posted : 21/07/2015 11:59 am
Pete
 Pete
(@pete)
I am Pete Admin

Some information here

https://cel-uk.com/where-is-my-dual-material-head/

If it is printable I think we probably will release a .stl verison. At the least we will make the parts available so users can upgrade to them.

For official support please create a support ticket using this link www.cel-robox.com/support/

ReplyQuote
Posted : 22/07/2015 12:26 pm
mjk
 mjk
(@holgafreak)
Active Member

One reason I came here now, noticed the same thing when printing two pulleys at the same time. Glad if the flat cable issue is resolved.

ReplyQuote
Posted : 25/06/2016 1:17 pm
click
(@click)
Noble Member

... will be resolved...

Still waiting for the fix... August is now mentioned as possible date.

ReplyQuote
Posted : 25/06/2016 8:35 pm
Paul
 Paul
(@carnivalius)
Eminent Member

Did anyone get a resolution for this in the end? I came back to find my print had pulled the new cable gantry (I got the dual head upgrade done by CEL earlier in the year) off and once I had seated it back I could see wear on the bowden tubes as they hang below the print head still. So they must have caught and pulled it off.

So looks like I still need to be careful where I place tall parts of prints.

ReplyQuote
Posted : 08/12/2016 11:21 pm
BHudson
(@bhudson)
USA Robox Support Moderator

@carnivalius Did you open a support ticket? You should also have some clips on the Bowden tube that will keep them together and out of the way. You may have to adjust the position for best results.

Yes, there is a solution - if you purchase the Service Option 1, your printer gets the same cable chain installed as used on the DM kit.

ReplyQuote
Posted : 08/12/2016 11:36 pm
Paul
 Paul
(@carnivalius)
Eminent Member

Yes I have that cable upgrade from my service and that's what was taken off by the catching tubes.

I didnt get some clips however, so I'll raise a service ticket. Good to know it may be because they missed something in my upgrade.

Cheers. Shall update on the outcome.

ReplyQuote
Posted : 09/12/2016 12:42 am
BHudson
(@bhudson)
USA Robox Support Moderator

@carnivalius The STL file is attached. You should print it at 104% scale in ABS. Attach them on the Bowden tubes and move them until you get a location that keeps the Bowden tubes at or above the bottom of the print head. You may also want to open a support ticket to make sure that you get the clips in the right place and that you get the parts that were pulled off replaced if they are damaged or reinstalled correctly.

ReplyQuote
Posted : 09/12/2016 4:00 am
click
(@click)
Noble Member

@pete is it worth having such information being communicated in different forum/topic (Announcements/Chatter/...) and or e-mail? I would have been completely oblivious to it hadn't @carnivalius asked the question. Especially if there is potential for some damage.

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Posted : 09/12/2016 4:51 pm
Paul
 Paul
(@carnivalius)
Eminent Member

I have opened a ticket and the result is I have an early version of the DM kit. The newer version is much more firmly attached to the carriage. So they are sending me revised parts to install. This should cover any that are damaged.

I'll print and install the clips too.

Thanks for the information! Very good to know!

ReplyQuote
Posted : 13/12/2016 2:47 pm
Asvaldr
(@asvaldr)
Eminent Member

I'm doing my first big print atm. Its a large open topped box almost the size of the xy print area.

The Bowden and the flat cable are getting pushed and flicked as they come in and out of the box.

I.e. when the print bed goes all the way to the back. The Bowden and cable are pushed by the printed box, they eventually "flick" over the wall into the inside of the box. Theyget dragged along and catch and move while the print is going. Its not seeming to stop the print in anyway at the moment. But I don't imagine doing lots of prints like this being a good idea.

My single head version made in "03 2016", bought October 2016 and just got back from CEL because it blocked bowdens when it arrived (all small prints, not this issue previously). So apparently it had some upgrade done to "x carriage" not sure what that means exactly.

20161220_191808_RoboxCableFlick.jpg
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Posted : 20/12/2016 8:16 am
Pete
 Pete
(@pete)
I am Pete Admin

This has been resolved with a new cable chain for newer production. For  the older ones you can reduce the sag by sliding the flat cable back toward the upper left corner of the build area. It can have a small loop before the clip which retains it beside the ambient light. If you make the loop quite big then slide the head all the way to the right it will pull as much as it needs from the loop.

For official support please create a support ticket using this link www.cel-robox.com/support/

ReplyQuote
Posted : 21/12/2016 9:54 am
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