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On my heated bed, I find that NEW Kapton tape always creates bad smelling fumes. After a few hours of heating the fumes seem to go away. In any case, the bad smell led me to build a fume extraction system.
Possibly related: I have a hard time getting the Kapton to stick to ABS for more than one day. The first day, it works great, then begins to degrade pretty quickly. I pretty much have to
by
bothacker
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Plastic Extruder Working Group
madscifi Wrote:
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> This last week I finished my EmcRepStrap build and
> have successfully printed a variety of objects. It
> consists of a geared stepper driven extruder on a
> CNC'd Taig and it is controlled using the approach
> discussed by David Carr (the stepper motor in the
> extruder is directly controlled by EMC2).
&g
by
bothacker
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EMC2
Bruce Wattendorf Wrote:
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> I have been thinking about designing a Motherboard
> 1.2 into a shield for the Arduino-Arduino Mega
> platform.
>
You might be interested in my Seeeduino Shield:
-Tim
by
bothacker
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Controllers
> > Just curious -- What is the official status of
> the
> > RRRF?
>
> Still functioning from all I have heard. You can
> read the changes on their website.
Really? The blog hasn't been updated for almost a year.
-Tim
by
bothacker
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General
Just curious -- What is the official status of the RRRF?
I thought it was useful resource when it was functioning.
Is it worth resurrecting?
-Tim
by
bothacker
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General
Definitely sockets on the backplane, and I like the idea of moving to single 12V supply.
I did a quick part estimate on digikey. There are probably cheaper parts, but for a first cut, here's some numbers:
Connector: 0.1" Dual Row, assuming 72 Pin
header, right angle, dual row S2112E-36-ND 3.42
header, female, dual row S7104-ND 3.59
part cost/connection ~ $7
Something else to consider: I see
by
bothacker
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Controllers
BeagleFury Wrote:
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> bothacker Wrote:
> > I've been frustrated with the shield format for
> a
> > while. I think this would be a big improvement.
>
> Just curious.. what frustrations have you had?
I find that the with shield format, with signal wires around the perimeter of the board, it is awkward to segregate noi
by
bothacker
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Controllers
I really like the backplane approach aka47 proposes. The Arduino Mega exposes around 70 pins, so it probably makes sense to do a dual-row connector. We might consider card-edge connectors. Not having to solder those 70 pins would be nice.
I've been frustrated with the shield format for a while. I think this would be a big improvement.
-Tim
by
bothacker
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Controllers
spacexula Wrote:
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> This forum has the ABSOLUTE worst software I have
> ever seen for a forum.
> -No Avatars
> -No imbeded photos
> -No imbeded video
> -No new posts link
> -No new thread link
> -No "ranking" of posters
Hear, hear!
Does anybody actually use the web interface to read new posts? And havin
by
bothacker
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Administration, Announcements, Policy
ryangeorge -
I'm not sure what my machine cost -- I've never added it up. The aluminum is fairly inexpensive from McMaster. The main cost for me was the time I spent designing and building it, which was significant. But I had fun doing it. I used a Taig CNC mill for stuff like the stepper mounts, and a lathe for some of the axle/drive parts. And I spent a lot of time in front of the drill pr
by
bothacker
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General
I wonder if as a non-profit, open source project, we could negotiate some low-cost licenses to SolidWorks (or other) CAD? Something similar to the academic licenses that they have.
-Tim
by
bothacker
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3D Design tools
Since you asked...
I've almost completed an aluminum t-slot RepStrap design using 80/20 parts.
I'll try to post some info later this week.
-Tim
by
bothacker
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General
I've been using EasyDriver boards from SparkFun, and they work great.
I made a separate receiver board to hold 4 driver boards, with RepRap compatible connectors. Makes using them plug-and-play.
-Tim
by
bothacker
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Controllers
Since the core team is based in the UK, I think it would make sense to hold it there.
-Tim
by
bothacker
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General
Has there ever been a global meeting/conference of RepRap users & developers?
If not, I'd like to propose that we organize one!
Would anyone else find this useful?
-Tim
by
bothacker
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General
I've always found it impressive that the 5D code included a G-code interpreter. What a cool capability for our little Arduinos!
But lately I'm less convinced that the interpreter should be included in the firmware. I've been looking towards getting proper acceleration code working along with microstepping, and I'm feeling very limited by the available CPU cycles. Spending CPU cycles parsing G
by
bothacker
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RepRap Host
I used aluminum tubing and channel for my repstrap. Check this post for some pics:
Architectural aluminum is a great building material, and it usually available at your local hardware store. I found that the 1/16" walled stuff was plenty strong enough, and much lighter than the 1/8" walled. The one benefit of 1/8" wall is that it is thick enough to tap, so you can connect parts with fewer fa
by
bothacker
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CNC Routers, Mills, and Hybrid RepRapping
Ian,
First make sure you are using the latest Skeinforge. Enrique fixed an inset infill bug in the last release.
If that doesn't fix it, "Infill perimeter overlap" should be what you are looking for.
-Tim
by
bothacker
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Skeinforge
When I ran Skeinforge on the new Mendel extruder stl file, the slicing was performed on the wrong plane. Is there a way to change the slicing orientation in Skeinforge? Or do I have to regenerate the file (somehow) in a different orientation?
-Tim
by
bothacker
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RepRap Host
Questions for the core team:
* What is the development roadmap for the 5D code?
* Are there any plans to unify the 5D and Sanguino3G codes?
-Tim
by
bothacker
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RepRap Host
I haven't been doing this long, so I'm still trying to get this all sorted out in my head.
The Gen3 Firmware wiki page seems to indicate that Gen3 firmware should utilize the Gen3 communication protocol.
Looking at the 5D code, it appears to have GCode interpretation on the master, and thus doesn't use the Gen3 communication protocol, so I mentally labeled it Gen2 (correct me if I'm wrong!)
T
by
bothacker
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RepRap Host
I spent some time today looking at what it would take to port the 5D (Gen2) code over to the ReplicatorG/Gen3 environment, and it got me wondering about the future of the JavaHost/Gen2 codebase.
With the Gen2 firmware still being actively developed by Adrian's group, do they have any plans to move to Gen3? Or are they looking beyond it?
And is anyone working on porting the 5D stuff to Replicat
by
bothacker
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RepRap Host
For that M107 I'd check your Cool prefs. There are options for turning the fan on and off.
-Tim
by
bothacker
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Skeinforge
Ok, one more question and I'll go away
To calibrate some speed and oozebane settings, I've been printing an unfilled unit cube (10x10x10).
Here is a pic of one of the midlevel layers from skeinforge:
The thread starts in the top left corner. Every layer (except base) is identical to this. You can clearly see the early shutdown of the extruder at the end of the thread.
What I'd like to do
by
bothacker
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Skeinforge
Enrique-
Thanks for the quick fix!
One other issue I've been having is getting the 'First Early Startup Distance' to trigger. If I understand correctly, this setting should cause the extruder to be turned on early leading up the to start of the first thread. Playing with the settings, I can't seem to get this to happen.
Could someone check if this feature is working?
-Tim
by
bothacker
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Skeinforge
I'm having a problem with the separation between the perimeter loop and first interior loop being too small. Here's a pic:
I think I've tweaked every parameter to try to change the separation, but have had no luck. Could someone point me to which parameters would affect this separation distance?
I'm running the latest skeinforge (posted above).
Thanks!
-Tim
by
bothacker
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Skeinforge
Looks like Geert and I are working with the same extruder design (mine a copy of the Makerbot plastruder).
The slow response time Geert and I are experiencing is definitely an impediment to improving the bang-bang controller. In the plots I showed, the temperature readings can continue to rise for more than 5 seconds after the heater has switched to low or zero power.
Nophead has got me wonder
by
bothacker
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RepRap Host
I've been experimenting with PID control of the heater element, with some success.
Details can be found here:
Would love to get some feedback...
-Tim
by
bothacker
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RepRap Host
Thanks for the great replies!
We might consider adding a second RS485 connector to the extruder controller so that we have the option to use the parallel bus configuration. Given that multiple toolheads would probably be situated near to each other, the chained wiring would be very clean.
-Tim
by
bothacker
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Controllers
Looking at the Gen3 motherboard, it looks like it was designed to use RS485 in a star topology. As I understand it, this is generally not recommended.
At our baud rates and cable lengths, is this just not an issue? And if not, what is the recommended configuration for the termination resistors? For a single toolhead, termination on the toolhead and the motherboard makes sense, but for additio
by
bothacker
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Controllers
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Pages: 12