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Printing issues ...
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No, not normal. You should be able to push it through with your hands.
Have you verified the temperature you are reading is correct?
My first guess would be your thermistor table might not be accurate.
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slauziere
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Plastic Extruder Working Group
A couple thoughts as I have had similar issues:
-check your extruder steps calibration...could be too much plastic
-check to see when the blobs occur; i believe those may be occurring after the completion of the perimeter and before moving to infill. If so, a fan may help (still testing this myself). hard to tell how much infill is in that model as i havent printed it myself.
If the blobs aren'
by
slauziere
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Printing
i had same problem with abs (worse with PLA actually). first couple layers looked good; then had issues as shown in his photo. I found slowing down, and printing multiples both helped. I'm still working on the fan, but I believe that should help as well as others have said.
by
slauziere
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Printing
what type of printer?
which slicing software and layer heights?
first place to look is z axis. Assuming some sort of prusa design, is your z axis constrained?
by
slauziere
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Printing
xiando,
looks like you have the more expensive, 'harder' version, of 8mm stainless rod. you should be fine. you could save a few dollars ordering the other part number.
biggest issue i would see is trying to use 5/16 with 8mm bearings. Even with 8mm rod, my ebay bearings aren't exactly smooth as silk.
by
slauziere
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General Mendel Topics
Melzi electronics? Not familiar myself, but I would do a search to see what others are doing with it.
What firmware are you trying to load?
What problems are you having? Just getting the firmware to compile/upload from the sketch?
I imagine they sell the kit with a recommended firmware...at least I would hope.
by
slauziere
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General Mendel Topics
I'm in Ashburn. A bit north of both of you.
I have a prusa up and running, but don't mind helping others...and of course I'm always looking for ways to improve.
by
slauziere
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Northern Virginia RepRap Usergroup
I am trying no restart on the retract, just to look at the differences. I am changing a couple variables at a time, which I guess I can do since it is a hobby. Still feels wrong though . I moved my psu, and had less strings, but I need to print the same object as before.
Also, I noticed that the blob isn't ocurring on the layer start. It is after running 3 perimeters, and then when it makes the
by
slauziere
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Printing
What print speeds are you running?
For troubleshooting that problem, I would slow it down. I agree with the others that it appears to be something loose.
by
slauziere
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Printing
B4Me,
I assume you are talking about the artifacts on the layer starts. What sort of retract settings are you using?
Polygonhell,
Thanks for the input. For the strings, I will try a few prints tonight. I think you are right is either mechanical or temperature related.
I realized that the inside walls of the cylinders do not have strings. So to me that rules out mechanical for now. It appears t
by
slauziere
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Printing
No, don't have a fan hooked up.
This is PLA printed on heated glass. I was thinking of adding a fan; haven't yet though.
This stringing is consistent on the last 10-15 objects I've printed. Depending on the object, it is more or less. Cylinder is the most.
I've attached a picture of the strings_block_and_cylinder to show a comparison. The objects were printed in that orientation (at different
by
slauziere
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Printing
I figured I would combine my two problems in one post.
I am running a RAMPS, Marlin, Slic3r 0.9.1, J-Head 0.35 system.
First, I've been printing some cylinders, such as this standoff on thingiverse. It appears the start of the layer causes a small blob to appear, almost like the nozzle is shifting over momentarily. I'm going to try and capture it on camera.
I dont have this issue in straight w
by
slauziere
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Printing
Just curious where your build stood with respect to a reprap capable of cutting attachments.
I am trying to decide what type of machine I want to build, and if I want to undertake the challenge of have a multi-tool cnc capable of 3d prototyping and also cutting tools.
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slauziere
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Baltimore/Wash. DC (and environs) RUG