Plastic Spaghetti

Andrew_Dowling · 2016-02-12T08:51:54.000Z

I wonder if this just comes down to the raft model spacing… Try bumping that down a bit. Too much and you might get a part that wont come off the raft, but if you get 100% good prints, its a step in the right direction. You might need to bump down the raft model spacing option for smaller prints. Been thinking about it all day, things I have experienced. Makerbot 5th gen is officially on my not recommended list in terms of reliability.

suecottingham · 2016-02-12T12:16:05.000Z

I use the painters tape that came with the printer - I clean it every 3-4 prints with alcohol but not every time. I will start doing that. That is an easy thing to do. Since this problem has started and Makerbot had me level the plate again, I have been leveling it before every print. The thing is sometimes it doesn’t print the bottom layer for it to adhere to and I think that is my major issue.

suecottingham · 2016-02-12T12:17:41.000Z

I only have the makerbot PLA filament from the makerbot site so that is a plus. When it does print it prints beautifully and it appears to be random when it decides to print and when it doesn’t. Some files will turn out just fine and others not.

suecottingham · 2016-02-12T12:19:14.000Z

I have tried to heat the extruder without the filament and it keeps telling me to load the filament. I am doing something wrong there. Test prints from the machine always come out right. I will keep trying.

Thank you for your help

ch4s3r · 2016-02-12T12:21:56.000Z

Hi Sue! I have been wondering what software are you actually using to print? Tinkercad or the makerbot slicer?

3dworldhl · 2016-02-12T14:15:57.000Z

Are you always printing with 0.4 mm layer height at least?

The max layer height recomended for a 0.4 nozzle is 0.36 mm. If the leyer height is higher the layers won’t stick well to each other.

The problem will be worse and much notable in models with smaller surface (as shown in the pict.).

Reduce the layer height to 0.15 mm (even if the prints take too much longer). If it solve the problem, increase gradually your layer height.

Andrew_Dowling · 2016-02-12T14:36:49.000Z

Don’t just math it out. Its not that simple. Things will work - there are other issues going on here. the smart extruder is far from perfect. there are a wide range of values that will work. 0,04 is not statistically significant!

magnacarte1133 · 2016-02-12T18:49:41.000Z

I would disagree (with respect) about the .4 resolution’s significance. It’s too high for printing. For a decent fusing to the previous layer not enough surface area would, at default printing speed, would have the time to fuse (I hope that’s clear(?))

Benefit of saving time wouldn’t be worth the trouble.

Even if printing speed was slowed down, it would defeat any attempt to save time.

I her case, I’m not convinced the problem is the extruder. And if her printer is less than a year old she’s working with a later version of the extruder - a 2.0 so to speak - and most of the glitches with that version had to do with operator error.

I’ve ordered the newly release Smart Extruder +, massive testing and collaboration with Stratasys went into this one.

Can’t Wait!!

Respects,

magnacarte1133 · 2016-02-12T18:54:22.000Z

Don’t for get about the “integrity” of the files created by your students. Have you changed any techniques, methods, modeling software recently?

I use Meshmixer quite often to analyze an object for defects in the model. It’s open source. People also use Netfabb (sp?) to do this.

magnacarte1133 · 2016-02-12T19:02:53.000Z

Double check to make sure the filament IS PLA. I made a mistake ordering without check to make sure of that.

After a few prints, the points where the extruder checks for leveling will develop divits, or even holes in the tape, screwing up subsequent points the extruder checks for leveling. You can save on tape if you simply carve out a section - a square - around that and or other check points and stick another piece of tape in it’s place.

suecottingham · 2016-02-13T16:04:04.000Z

I only have Makerbot filament. I keep it in the plastic bags with the little silicon packets to keep it dry when not in use. Even though I didn’t know any better until reading everyone’s posts here, I figured there must be a reason they are shipping it in bags with absorbing packets…lol. Common sense can go a long way sometimes. I can easily change the tape I have tons. I will do that Monday when I get to school. Easy enough

suecottingham · 2016-02-13T16:39:06.000Z

Design on tinkercad and print on makerbot

suecottingham · 2016-02-13T16:39:55.000Z

Thank you. I will do that.

suecottingham · 2016-02-13T16:46:06.000Z

The printer was purchased in october 2015 and delivered in November. Makerbot is is looking at replacing the extruder and has asked for my logs and since the new 1.9 download they have found a few errors in the log. Now I don’t know what that means, but probably not good.

suecottingham · 2016-02-13T17:07:21.000Z

I have no idea where the screw is. The new update wiped out every setting. They are all on zero so you are probably correct there. I found a button that says restore defaults. Would that turn it all on? I only have 1extruder now but know I need more. The school doesn’t provide this I have to so I am saving for that because I need 3. I keep the filament in the bags with the silacon beeds to keep them dry when not in use. They are kept in a drawer of the science counter. That is all i have right now.

magnacarte1133 · 2016-02-13T17:28:04.000Z

Don’t worry about the error. It’s best to have one if you think about it. Since you uploaded the newly released 1.9, try uploading the version before this last one. Plus, uninstall MB desk top and download it again. We want to start fresh. Regardless if they replace the extruder, i would recommend getting the new Smart Extruder + before Feb 29. It’s been extensively tested and the promo of $99 end. After Feb., it’s $199.00. But Don’t regard this response as a pitch. I’ve got two i use for demo’s and I’m very satisfied.

Andrew_Dowling · 2016-02-14T05:31:21.000Z

There is a switch. It is there to stop the print when you run out of filament. On a home made 3d printer, when you run out, it just keeps going. You get a half done print. Makerbot added both a switch, and an encoder wheel (the wheel spins, it expects 5mm of filament to move, the wheel can measure 5mm, if 3mm or 8mm moves, it trips an error and stops the print “filament jam detection”). That is the “smart” part of the smart extruder. People keep posting on here - even though they CLEARLY don’t own a makerbot 5th gen. The 5th gen is a completely different type of beast. Its not a replicator 2. Its not a reprap. Its a 5th gen. And there is a reason there is one nailed to the wall of almost every makerspace out there. I got 2 years with mine - and I have learned to love to hate it. You have to treat the 5th gen differently.

Andrew_Dowling · 2016-02-14T05:33:11.000Z

It wont post the same error. The control board, wiring and, well just about everything is different on the 5th gen.

Andrew_Dowling · 2016-02-14T06:07:55.000Z

I am willing to bet she has the old smart extruder. I still have the old one. I get the feeling makerbot keeps the 3d printers in a warehouse, and hers is probably a year and a half old as of today. I agree with the get the new extruder idea. The PTFE tube the stuck inside the thing is something they should have done out of the gate. I still hate their extruder design in general though. Even the new one is still a terrible design. But its a huge step in the right direction.

Andrew_Dowling · 2016-02-14T06:18:49.000Z

Never mind the filament jam detection. If you didn’t mess with it, its on by default. Call makerbot and ask nicely. You might be able to get a second smart extruder for free. Good job on keeping the filament dry. Fresh filament is the best kind. You can dry it a 60C in an oven of some sort. Also be sure to keep it clean when its on the machine. Dust gets all over filament.