<![CDATA[SoliForum - 3D Printing Community — Very slow extrusion]]> https://www.soliforum.com/topic/7075/very-slow-extrusion/ Fri, 15 Aug 2014 01:19:34 +0000 PunBB <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63324/#p63324 Lyman's original winder cost me about $80 to build.  It doesn't have any way to coordinate with the extruder, so you have to let the filament pile on the floor for a few hours and then start the winder and hope it doesn't catch up to the extruder and start stretching the filament.  You can use it to pull the filament directly from the extruder and set a speed that stretches to the diameter you want, but the tolerance won't be better than about .15mm assuming you use a stepper rather than a gear motor.  There is some variation in extrusion speed from the filastruder, and if the speed of the puller isn't changing with it, the diameter changes instead.

]]> Fri, 15 Aug 2014 01:19:34 +0000 https://www.soliforum.com/post/63324/#p63324 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63322/#p63322 Lyman's winder is around $250. I haven't seen any results of it with PLA.

]]> Fri, 15 Aug 2014 01:01:09 +0000 https://www.soliforum.com/post/63322/#p63322 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63320/#p63320 elmoret wrote:

The vibration motor is only needed for vertical hoppers.
What temperature are you extruding at when you find the extrusion is slow?

160 for PLA,190 for ABS.
I tried lowering the temp down to 150 to fix the diameter but the more i waste PLA pellets the more i realize that gravity ruins it all.
Its near perfect when it comes out, but once it start to gain weight and starts pulling its self down, game over.

I bet filawinder is the solution, but i dont like its curent state of development or its price so ill have to wait for change or someone to reply me with price on lyman's winder.

]]> Fri, 15 Aug 2014 00:42:31 +0000 https://www.soliforum.com/post/63320/#p63320 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63316/#p63316 Is that on the larger nozzle? I'd back it down to 185 or so to keep your diameter variation in check. You shouldn't give up much speed, maybe a few ipm.

You can get fiberglass header wrap from Amazon, or pipe insulation like what I send with the kits from McMaster.

Glad its working out smile

]]> Fri, 15 Aug 2014 00:18:12 +0000 https://www.soliforum.com/post/63316/#p63316 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63314/#p63314 1.60mm

]]> Fri, 15 Aug 2014 00:08:01 +0000 https://www.soliforum.com/post/63314/#p63314 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63311/#p63311 What kind of diameter are you getting at 190?

]]> Thu, 14 Aug 2014 23:46:16 +0000 https://www.soliforum.com/post/63311/#p63311 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63308/#p63308 YES!! 16 inches per minute. I am running at 190 with a fully insulated barrel (some rags). Only problem now, is I need to print more spools...

I will edit this post later with some pictures.

]]> Thu, 14 Aug 2014 23:40:58 +0000 https://www.soliforum.com/post/63308/#p63308 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63307/#p63307 The vibration motor is only needed for vertical hoppers.

I assure you the shape of PLA pellets is not an issue. I have extruded PLA quite fast, though tolerances were not good. What temperature are you extruding at when you find the extrusion is slow?

http://www.soliforum.com/topic/4108/my- … s-and-pla/

6ipm with PLA due to running lower temperatures. Note that he had a different model temperature controller, 140C on his controller is 155-160C on ours.

The ABS I ship with kits is optimal because of its MFI, not its pellet shape. Search the internet, you won't find anyone complaining about the shape of pellets.

Stand on the shoulders of the giants that came before you...

]]> Thu, 14 Aug 2014 23:09:24 +0000 https://www.soliforum.com/post/63307/#p63307 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63306/#p63306 LOL
ABS pellets that filastruder ships with the extruder are the best because of their shape.
Virgin PLA bb's suck. They are rounded and slip thru very easy making extrusion very slow. I have no idea what to do about that. Maybe i can regrind them into smaller pieces ? Will see.

What vibrator did you use, can you share a pic ?

]]> Thu, 14 Aug 2014 23:05:11 +0000 https://www.soliforum.com/post/63306/#p63306 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63246/#p63246 Thanks for the info.

For me the problem was that the plastic palettes were not flowing into auger freely. constantly shaking the pallet holder helps. We put a small vibrator to fix this issue.

]]> Thu, 14 Aug 2014 11:34:08 +0000 https://www.soliforum.com/post/63246/#p63246 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63241/#p63241 Agreed.
I highly suspect feeder screw being too close to the nozzle. Mine is at 1/4 of an inch, used to be like 1 inch or more.
According to assembly, heater should gofurther away from the nozzle. To me it says: (pre-melting too close to the nozzle is no good). Based on that i figured if i have my feeder closer to the tip, i would have more less of melted material inside but looks like its the opposite.

Perhaps pre-melted plastic is moved not so much by a feeder screw but pellets that are pushing it from the back.
Correct me if am wrong.
If i am correct, then moving feeder screw further away from the nozzle (creating more pre-melting area) would increase the flow.
Assembly instructions 95mm from face of the collar to edge of the feed screw
http://www.soliforum.com/misc.php?actio … =6792t7075
But the importance of it is not here, but at the nozzle and how much of pre-melt you get.

Anyway. After moving the collar more toward the front of the feeder screw (toward the nozzle or 95mm per instructions) 10 minutes after i noticed extrusion finally picked up. Keep in mind that i had my heater close to the nozzle (not per assembly instruction). Moving it back away from the nozzle slowed down extrusion to near zero, and moving it forward picked it up almost instantly.

Try that first: 95mm collar distance and heater closer to the nozzle. Wait 10 minutes and check.

And why no one sleeps at this hour anyway ?

]]> Thu, 14 Aug 2014 07:33:59 +0000 https://www.soliforum.com/post/63241/#p63241 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63237/#p63237 I saw a pic somewhere on here of auger and it looked like lots of rough places to grab plastic. its just a large ship auger drill bit which are made by several companys with different tooling some smoother some with thicker shaft and shallow ribs/fluting than others and prices are all over from cheap to way over $100 for these large ones. the objective here is for the auger to just feed pellets through and out as sized plastic string fast as can be done properly without melting back to hopper or sticking to auger. while filtering particulates and not burning plastic. so the better we determine problem the less expense wasted fixing it.

]]> Thu, 14 Aug 2014 06:54:50 +0000 https://www.soliforum.com/post/63237/#p63237 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63236/#p63236 What is the optimal distance from tip of the feeder screw to the nozzle ?
I get 1 inch per hour LOL after moving closer.

I understand that there were specs on how far it needs to go from the back to the locking collar etc but no specs from top of the screw to the nozzle or heating area.

Any ideas ?

]]> Thu, 14 Aug 2014 06:51:55 +0000 https://www.soliforum.com/post/63236/#p63236 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63235/#p63235 Have you tried all of the above? What were your results?

]]> Thu, 14 Aug 2014 06:35:55 +0000 https://www.soliforum.com/post/63235/#p63235 <![CDATA[Re: Very slow extrusion]]> https://www.soliforum.com/post/63233/#p63233 How would I go about getting a new auger and barrel?

]]> Thu, 14 Aug 2014 06:14:18 +0000 https://www.soliforum.com/post/63233/#p63233