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randysteck

MPCNC Drag Chain System

by randysteck Jan 2, 2018
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This is so close to working on the Burley, but not quite, fwiw. The clip on the larger part interferes with one of the bearings. The bevel where it rides on the XY part doesn't line up the same, although I don't think that would affect it too much. The opening of the small part on the other end is a bit too narrow.

The parts for the motors fit fine, obviously. I do have a couple of minor preferences, though. I'd rather use a 1"x1" aluminum angle so that a wider chain won't hang off the edge. And it would be nice to have an option of not having the aluminum angle extend a bit over the edge for additional cable management options. While tidy, the indentation you made for the angle requires somewhat precise cutting of the aluminum. Not a critique, but more of a wish list.

If I can offer any help, btw, I'd love to collaborate. Your design is great and I'd really like to make it work. I can offer measurements, Beta testing, photos, etc. Let me know if you're interested. If not, no biggie

Yes, it’s unfortunate that the dimensions of the X-Y piece changed at this location. I have not had time to address an update to the model yet but hope to very soon.

Good point on the motor mounts. There’s really no reason for the smaller angle material except that it kept the overall height and weight down, which were design goals. I can certainly look at the angle mods.

If you’re running Burly, have you noticed much improvement? I’m particularly interested in reducing the sideways deflection of the tool which can get pretty bad under load with the older design. That’s about the only reason I’d tear down the system to do the update.

I never used the pre-Burly parts, so I cannot compare. In fact, my machine is still pretty new. I have a nice looking crown, but haven't put it to the test yet with a router/spindle. I'm wrapping up the cable management and plan to drill the spillboard this weekend. After that, I should have some more data. Right now, the weak link for rigidity is the part holding my Bosch Colt router. The one that I printed from here flexes more than the middle assembly/z gantry. I'll either design a new one for the Bosch or pick up a DW 660.

Happen to have a version of this that fits the "burley" center section?

Working on it. Kind of bummed that I can't easily get original design files but will get it to work since the upgrade is worth it.

Very happy to hear that you are updating the design. Printed the new "Burley Center and realized it was not going to work with your design so I put it in a box and decided to wait. The drag chain system you designed was the best one out there. Can not wait till you release the updated design. Keep up the good work.

Nice, you could try print the drag chain .. https://www.thingiverse.com/thing:915487

Drag Chain with mounts
by TuxSoft