Welcome! Log In Create A New Profile

Advanced

Cable management to the X-Y carriage - how did you do it?

Posted by David J 
Cable management to the X-Y carriage - how did you do it?
January 31, 2018 07:16AM
My CoreXY printer has the X-Y carriage and extruder cables kept under control via this cable chain (filament goes separately):



This has worked really well up to now, but the link connections are wearing and the whole thing's getting very droopy, despite supports to help it out as it moves around. It's getting so bad now that the links' connections will just pop out at the slightest touch. Clearly I'm asking too much of this sort of chain, so now I need to improve things.

I'd really like to see pictures of what other builders have done, to give me some ideas for improvement.

Thanks in advance,
David
Re: Cable management to the X-Y carriage - how did you do it?
January 31, 2018 09:20AM
I think that if you buy commercial drag chain you'll find the tolerances much tighter and it will last longer. Drag chain is cheap stuff- there's no reason to print it when the commercial stuff is so cheap and performs so much better.

I use a horizontal drag chain in my printer, but I have it arranged in a very large, gentle loop. It looks like you have it anchored to the frame along the right side which will force it to curl in a pretty tight radius. Besides wearing out your printed drag chain, that will cause wire breakage eventually, and that can be a difficult problem to isolate because the wires break inside their insulation and become intermittent. If the motor driver leads become intermittent, they can destroy the motor driver chip.

Here's my drag chain- it anchors on the left side and curls around the extruder carriage a full 360 degrees where it anchors at the left front of the extruder carriage. I does require extra length to do that, so it droops a bit, but it doesn't flex any of the wires in a small radius.



You might be able to see it better in this picture- the drag chain anchors on a small piece of metal attached to the printer's frame on the left side where all the cables are, with the opening facing the front of the printer, then curls around and attaches to the extruder carriage with the opening facing the back of the printer.



Edited 2 time(s). Last edit at 01/31/2018 09:28AM by the_digital_dentist.

Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cable management to the X-Y carriage - how did you do it?
January 31, 2018 11:03AM
Interesting... I've just had a quick look at ebay - I hadn't realised how available drag chain is, nor how cheap. I wish I'd known before I printed that lot!

I still think I will need to have a high loop in some form, but I haven't worked out how yet.
Re: Cable management to the X-Y carriage - how did you do it?
January 31, 2018 11:37AM
I’m using a db25 cable and two breakout boards





Edited 1 time(s). Last edit at 01/31/2018 11:41AM by Qdeathstar.
Re: Cable management to the X-Y carriage - how did you do it?
January 31, 2018 04:50PM
My other printer, not corexy uses a flex-ribbon cable:



I struggled to figure out how to use it in a coreXY (I have another one of those cables), but couldn't figure out a good way to do it.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 12:20AM
What's the power rating of ribbon cable like that? I would have to feed the hot-end, extruder motor, a few fans, etc.
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 04:19AM
Here's how I wired it. I never installed the LEDs or the bed sensor (no need), and it uses a 24V supply, not 12V.




Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 05:01AM
That's roughly the setup I'm running - 24v, etc. I did some research on ribbon cable and it looks like it's generally rated at 1A per lead, so doubling up pairs for the nozzle heater would be sufficient.
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 07:13AM
I was running at 12V, 40W heater initially, so 3+ lines were needed. I couldn't feel any heating in the cable, so I suspect the 1A rating per conductor was pretty conservative, and maybe limited by the connectors more than the cable.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 08:37AM
That DB25 cable setup is very interesting.

I wrapped my wires around my bowden tube, not particularly fancy, but effective.
Re: Cable management to the X-Y carriage - how did you do it?
February 01, 2018 05:47PM
i like it, it is self supporting, it your printer was very big i thing you could just add a hook,... I am not printing yet though and i haven’t tested it fully. It has 20awg wire in it which is good enough for the 40w heaters my set up is using.

Edited 1 time(s). Last edit at 02/01/2018 05:48PM by Qdeathstar.
Sorry, only registered users may post in this forum.

Click here to login