Could you help me debug this print? :)

[daniel...@gmail.com]

Hey :)

Can someone help me debug what's wrong with this part?

I have printed this on a Makerbot Rep 5th gen. Note the marked area on the first pic, where the print is wawy - the plastic is actually translucent there, ie. it's spongy.

This part was printed with Dynamic speed turned on - a previous print without Dynamic speed was also somewhat under-extruded, but dynamic speed actually made it **worse** as opposed to better!

Here is the part printed without dynamic speed. The circular walls are still spongy at the top, and the axle is weak and brittle, but the sides of the walls are all solid.

Also, to complicate things, the axle looks and feels a lot better on the dynamic speed one.

[Joseph Larson]

All your images are broken, so it's kinda hard to help.

[Ryan Carlyle]

Inconsistent extrusion. Quite common on the 5th gen. Look for the various tips/tricks threads here and on the olds Makerbot Operators group.

[daniel...@gmail.com]

It seems to work fine on the web interface... Anyway, here's the URLs:

With dynamic speed:

http://s7.postimg.org/3u7aw7wq3/IMG_0781.jpg

http://s29.postimg.org/ycs31cy47/IMG_0778.jpg

Without:

http://s4.postimg.org/54pq23e1p/better.jpg

[Dan Newman]

On 29/09/2014, 8:02 PM, daniel...@gmail.com wrote:
> It seems to work fine on the web interface... Anyway, here's the URLs:
>
> With dynamic speed:
>
> http://s7.postimg.org/3u7aw7wq3/IMG_0781.jpg
> http://s29.postimg.org/ycs31cy47/IMG_0778.jpg

Keep in mind that the dynamic speed control in MakerWare is known to
have issues even with MBI's more mature, better behaved Rep 2 and 2X
printers. So that you get better prints with it disabled isn't
much of a surprise. But, hopefully, others here will have some
useful advise on how to tune the dynamic speed control.

Dan

[daniel...@gmail.com]

Thanks guys :)

Anyway, the biggest problem seems to be with small circular areas. Other than that, the print quality is good enough - well not "3 grand good enough", an Ultimaker would blast this thing out of Earth any day, but I didn't pay for it, and it's what we have, and it's quite okay for something I didn't pay for. ;)

So anyway, I read up on the common practices. :) I'll definitely try to feed in the filament without the plastic guide tube. There is definitely far too much friction going on.

As for the homing, I have already discovered that I need to change the center blue tape every now and then, and even so, printing without a raft is pretty much an impossible feat - once again, not motivated to fix it, I'm not paying for the plastic, and neither do I think I'd get approval to replace the plate or something like that.

But still, I have no idea what to do about those circular areas. Dynamic speed only seems to make things worse, and I don't know about slowing the general feed rate down. Is there any documentation or tutorial around for setting speed and acceleration correctly?

D

[Dan Newman]

On 29/09/2014, 8:36 PM, daniel...@gmail.com wrote:
> Thanks guys :)
>
> Anyway, the biggest problem seems to be with small circular areas. Other
> than that, the print quality is good enough - well not "3 grand good
> enough", an Ultimaker would blast this thing out of Earth any day,

An ultimaker would have the same issue on small circular areas EXCEPT the
slicers you can use with an ultimaker *know* that Marlin has difficulty
on small circular areas and will slow down the speed there. Of course,
that's one of the things that MakerWare's "dynamic speed" is supposed
to do as well but isn't for you. And with a Gen 5 bot, you have no
choice but to use MakerWare.

Dan

[Joseph Larson]

What slicer, for those of us using replicators, would you suggest?