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Folgertech FT-6 cable chain system

by Blinkingsun Apr 20, 2019
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Is there any reason I can't just mount the X chain on the middle of the extrusion and use less chain?

FYI, I ran into issues with the dual bowden system on my machine. The extruders are positioned underneath the top rail and interfere with the cable chain placement, unfortunately. Further, since I have the gantry mounts you designed that elevate the Y-axis higher, the tower for mounting the gantry chain will crash into the extruders as the X-axis moves. In the long term, I'll likely rework the extruder placement rather than the chain and place the filament at the front of the machine for accessibility as well, but for now I'm simply routing my cables along with the bowden tubes. Thank you for the design, I'll post a make once it's up and running.

Could you send me a picture of the extruder mount so that I could better visualize and make some adjustments or design an extruder mount to get around an issue with the chains? All of the parts that I have made were designed on a direct drive printer and everything else was developed with measurements from other people but I have been unable to test them myself. Comments like these (especially if you can send me pictures or take measurements of specific things that need adjustment) greatly help to make sure that I'm able to give the community the best parts possible.

I ran into very slight clearance issues when I raised the Y axis as well with the tower contacting the bottom of the arms that support the chains along the top rail. I got around that by heating them and bending up. It needed about 2mm of clearance so it wasn't much. I'm considering a complete redesign of the chain system in order to make them totally silent in operation after dialing in the 32 bit SKR controller and TMC2208 drivers at 256 steps because now the chains are the only real sound when running. "Follow" me if you haven't already. I make new parts relatively frequently and have a few new designs which are almost ready for sharing.

Attached are pictures of the dual extruder setup. The more I look at it, the more convinced I am that the best thing to do is to run them on the front of the machine and have the cables run in the unmodified cable chain along the rear. I will be working on the printer more this weekend and will respond with success or failure or the switch.

You can also see that I chose to mount the Z-axis chain in a different location than your reference images.

Did you ever finish the setup? Mid way through a dual extruder aswell, and wondering how you came out overall.

See attached; this is what I had to do with the extruder mount. The picture isn't great but you can get the point. Moving them to the front also helped with spool changes. I use one of the universal spool rollers https://www.thingiverse.com/thing:2165694 like this on the desktop instead of the jank T-shape thing shipped with the printer.

I may get around to doing a proper printed version of this, but for now it'll live with the cut wood version.

Super Simple Spool Holder
by bxd2000

I did end up moving the extruder to the front in order to make it work. I can't take current pictures as I'm out of the country currently, but there's a wooden block that supports the extruder higher than normal in order to provide clearance. I'll have to remember to post images when I return.

Nice work Bro or Sis. Real clean rig. I saw this on the FB group and I am glad I found it here.

I think I am going to use this for the bed cables.

Also does your bed drop when prints are complete due the weight of the glass? Mine does.

Thanks, I'm glad that other are able to benefit from my designs. My bed does drop just a little after the Z stepper disengages. You can turn up the idle time in the firmware to keep it from timing out longer during filament changes and such... It will still drop after a print or cancel though if your end-gcode is set that way. One of the new design concepts that I'm working on is a Z counterweight system for neutralizing the bed weight on the stepper. The reason for me is Z accuracy but it would also work to keep the bed from dropping from an idle stepper.