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Cable chain for Replicator Dual Xmotor

by stephenmhall, published

Cable chain for Replicator Dual Xmotor by stephenmhall Jul 28, 2013
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Summary

Added a new start link for Flashforge Pro. uses the side panel mounting hole.
Cable chain for Replicator Dual Xmotor. To stop cable damage (repaired once already).
16mm x 12mm triangular internal hole. about 60mm diameter turn.

Self supporting and sits flat.

Sketchup model is in warehouse.

Video of chain in action.
http://www.youtube.com/watch?v=7tPRTCV0zcw&feature=youtube_gdata

Instructions

designed in sketchup. sliced in makerware at medium. printed on replicator dual clone. (3hrs for 12 links).

links Printed with raft but no support. Support on both ends

used longer screws from my spares kit 15mm i think and slightly larger washers.

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Attaching this you had to drill through the side wall, correct?

It fits over and uses the original cable management screw hole on the Flashforge pro. If that helps.

Ahhh. I have a Qidi and people say they used this but our screws do not have holes they are part of the frame and just protrude out which means we can't extend the length of those screw "nubs".

can you change the part to use a nut on the inside?

What do you mean? I was going to try the main part and see what I could do as the Qidi uses a cable clip like these http://www.narva.com.au/sitebuilder/products/medium/979/pc-clamps.png over the the small m3 built in screw.

You could possibly modify the part to fit over the built in screw that is there and use a nut on the inside to attach it. You would just need to remove the hole in the part and make another one in the right place and correct size with a big enough hole on the inside to fit a nut on the screw and tighten it with a box spanner or pointed pliers. If you send me the dimensions where you would be mounting it I can see if I can change it for you.
I have had another look at my Flashforge and it is maybe similar to yours there is an unused thread stub above the chain link that held a cable guide and I have it mounted using the outside cover screw turned round and screwed from the inside instead of from the outside, there is a threaded hole in the frame.

All this is, really, is a 3mm screw stub and they used a 3mm nut (they didn't even use washers) over it. My wonder is with only 1 nut to hold this in place what will keep it from sliding around (up and down) when the extruder comes back and goes forth? I wish there were two close by BUT there are a lot of them evenly spaced so what dimensions do you need? I would suspect a screw hole in the middle and one farther up, or maybe down, to hold help shore it up. I am not 100% sure the square piece will fit but I have measured it against my room yet.

I just use one screw too, the part fits snugly in the angle so cannot really move when fitted. As long as you can get the nut a little bit tight it should be ok, all the movement is horizontal not much twisting.

Here are two pictures and I see a big issue with the mounting to the motor assembly as there is no where to mount to it that I can see. http://i.imgur.com/tSefDXy.jpg and the front screw I would have to go back to eBay (45 day wait) to purchase longer screws from the front. Oh, here is the two screws I would make an arm for http://i.imgur.com/LDWH35b.jpg

That looks identical to mine, just remove the lower cable clip and the bracket should go over the hole underneath using its screw but screwing into the inside hole. It is a tight fit and will probably be self supporting without a screw in. You might have to rim it a bit around the hole on the other side. And yes you need 5mm longer screws but any M4 Allen head screw of the right length will do off ebay, should be able to get them in a day or two. I order different sized bolts all the time, normally about £2 for 20 or 30.

20 to 45 days here in the states BUT I was in luck the little kit that all of these Chinese knock off printers comes with had 2 more screw that were 5mm longer so I was saved. ABS or PLA? I hear snap fits don't work in PLA they break but I have never tried snap fits with PLA.

Honestly can't remeber if PLA or ABS, probably ABS for temps. There is not much flex so either should work.

Probably ABS at least on the motor side but I haven't tried ABS on this machine (a complete nightmare from the moment I received it and honestly they should have returned my money or replaced the machine but instead I had to tear it all down to replace a bent/bowed rod in the back that was tearing up the machine). I have learned that from now on I will never purchase anything on eBay from a Chinese seller directly that cost this much and weighs this amount. To return this 60 pound machine to China would cost me over eleven hundred dollars so I had no choice I had to tear it all apart and I am just now coming to a point to test print with it.

Worse case it moves and I add an arm 1cm above it for the other screw. What is that piece with 4 screw holes to as that is the piece the drawing shows is attached to the side panel and I do not have 4 screws there.

X Motor? Wouldn't that be the Y motor that is in the video? I would love to see it on the X.

Pretty sure the motor on the end of the carriage is X the Y is mounted on the back of the case. Well that is how I always think of it, X left / right, Y forward / back, Z up / down.

If you notice in your video that is going front to back and is the only chain I see so X is what is being shown as you said. The Y motor is hidden I think.

About to finish my print! Do the stepper motor bolts go through the mount? If so, isn't the amount of torque needed too tighten those bolts too much for the 3d printed part? My cross section view does not show 100% fill around the bolt holes on the 3d printed part, i assume it would crush when tightening the bolts? Thoughts/experiences?

Yes the bolts go through the mounts, you might want an extra 5 mm on the bolts. I use washers too. Not had any problems with the fastening on two machines so far. The original part is ABS so it is not like you are cranking it up to squeaky tight :)

Hi, what does "no support" but "support on both ends" mean?

The links print ok without support but the 2 end pieces need supports.

Works great! For my Flashforge Pro I used the cablechaindrive_small and the chainstart dated 5/4/15 with 13 links. Thank you!

Wow, great design! Thank you so so much. I had to replace my X axis endstop cable AND x-axis motor cable. This thing printed extremely easily and makes no noise while in use. The pieces snapped together with ease.

I printed 13 links for my replicator 1 dual because 12 made it look like this strain relief chain was trying a little too hard to stretch.

I used M3x10mm screws and M3 Nylon Locking Nuts to screw it in. I got them from Home Depot.

Thank you so much!!

Printed one and fitted it. Thanks for sharing this.

Now fitted and working on the machine. Just jogged so far, will maybe get a short video of it running next print.

Seems I forgot the adage, measure twice cut once. The model of the Nema 17 stepper I was working off is about twice as long as the replicator one. So some remodeling needed.

Sorry guys I posted the wrong standard link part. propper one on now.

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