SoliForum - 3D Printing Community — Is my feed screw too long?

Re: Is my feed screw too long?

null@example.com (elmoret) — Tue, 14 Feb 2017 04:49:22 +0000

The supplied screws are sufficiently long enough.

Re: Is my feed screw too long?

null@example.com (pap4tinker) — Tue, 14 Feb 2017 04:04:41 +0000

Ok, then I shall have to do that after I locate some longer screws. Thank you for replying.

Re: Is my feed screw too long?

null@example.com (elmoret) — Tue, 14 Feb 2017 03:26:31 +0000

Don't worry too much about the nozzle to auger clearance, just measure how much of the auger sticks out of the barrel. The target is around 5, maybe 10mm. If you have longer than that sticking out, use the 4 extra acrylic spacers to move the gear motor backwards, by installing the spacers between the gearbox and chassis.

Re: Is my feed screw too long?

null@example.com (pap4tinker) — Tue, 14 Feb 2017 02:34:03 +0000

With the assembly connected as it appears in the instructions and as William shows above, I have about 1mm or less clearance between my auger end (pushed fully forward as could be possible before pressure is applied by the plastic). Of course when underway, It would be more like 3mm clearance. However, the example shown in the instructions would have me believe proper clearance should be more like 13mm (estimated). I think having the auger so close to the end would prove to have colors not mix well, is this true?

Re: Is my feed screw too long?

null@example.com (pap4tinker) — Tue, 14 Feb 2017 01:07:00 +0000

I have this same problem. I just wonder how much room I will need between my nozzle end and the end of the auger. Any specifications for this measurement?

Re: Is my feed screw too long?

null@example.com (william) — Mon, 06 Feb 2017 09:26:10 +0000

looks like this right now, but like you said, I'll probably be fine anyways, so ill proceed.

Re: Is my feed screw too long?

null@example.com (elmoret) — Sun, 05 Feb 2017 20:47:04 +0000

Looks good assembly wise. I think it's a combination of the barrel/flange being a little short plus the auger being a little long. I think you'd be fine as is, but a couple suggestions:

1.) Use the 4 extra acrylic spacers to move the gear motor backwards, by installing the spacers between the gearbox and chassis.
2.) Or use the same spacers between the flange and the lasercut acrylic part.

Of the two options I'd lean towards #1.

Re: Is my feed screw too long?

null@example.com (william) — Sun, 05 Feb 2017 20:38:03 +0000

Re: Is my feed screw too long?

null@example.com (elmoret) — Sun, 05 Feb 2017 18:50:58 +0000

Could you post a few photos of the rest of the machine as assembled so far? Particularly everything from the gearmotor to the flange.

Re: Is my feed screw too long?

null@example.com (william) — Sun, 05 Feb 2017 15:23:39 +0000

Is my feed screw too long?

null@example.com (william) — Sun, 05 Feb 2017 15:17:27 +0000

I was following the assembly instructions (release rev 21).
When I got to step 9, I noticed that I cannot get the feed screw to protrude 5mm out of the barrel.
I have loosened the clamping screw on the shaft collar.
Nothing tightens the feed screw, I can pull it out.
Yet, when I push it as far in as I can, there is still a good 13.74 mm sticking out. (See attached image.)

Any ideas?