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Try and play here.
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That makes sense. Thanks.
by
madscifi
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Printing
So you fixed the problem by switching the driver board for one that support 1/32 of a step? Or something else?
by
madscifi
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Printing
What you've described and what appears in the pictures could be caused by the stepper motor configuration for the extruder stepper. It looks as though the stepper is not microstepping properly.
Some questions:
1) What stepper motor controller are you using?
2) What is the number of microsteps that you have configured on your stepper controller?
3) What is the current that you have set on your st
by
madscifi
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Printing
Depending on where you are in Orange County it might be a bit of a drive, but there is a small chance that Deezmaker might have some the could sell you. Definitely call ahead and check. They are open on Sundays the last time I checked.
by
madscifi
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General Mendel Topics
Color XT is not PLA, which probably explains why PLA is not behaving as expected. ColorFabb says (Color) "XT was developed to be an alternative to our PLA/PHA range." The Ultimaker community forum heading is incorrect.
by
madscifi
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Printing
Martino, very nice work. Another thing you might try to help address the leakage problem is to make your nozzle in something that is strongly hydrophobic (Teflon or polystyrene, for example). It is also possible to coat metal nozzles with Teflon. You'll still need to control the water pressure either by controlling the height of the water column above the nozzle or creating a back pressure (as yo
by
madscifi
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Powder Printing and Selective Laser Sintering
I've been a user of Thingiverse but I have some issues with the new Terms of Service and I'm interested in what others think. I asked the following questions of support@makerbot.com (as suggested in the Terms of Service) and was essentially told to go ask a lawyer.
Section 2.1 (Site-License) allows onl
by
madscifi
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General
Peter, Thanks.
I'm getting much better results with the opaque yellow. One thing that is curious is that even with 0.2 mm layers the surface of the objects show very little stair-stepping. I'm assuming that means that I have not cured the resin sufficiently, but that is just a guess at this point.
I have also learned that resin containing pigmented dyes needs to be stirred just before prin
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madscifi
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Polymer Working Group
Spacexula - it is very sad that you were personally attacked. The community has lost a deal due to this. I hope you reconsider working on the front page in spite of the trolls. Sadly, in any open community like this, the trolls often drive out very good people. It is especially difficult with private emails as the community does not have a chance to make it known that the unreasonable opinion is
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madscifi
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General
spota Wrote:
-------------------------------------------------------
...
> Adding dyes may become necessary for having a
> better control of voxel dimentions. There are some
> succesful tests that have been made using Castin'
> Craft Amber and Yellow resin dyes. We have
> achieved 0.025 -0.045mm resolution with those on a
> DLP printer setup:
...
Spota, have you actually been a
by
madscifi
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Polymer Working Group
The purpose of D2 is to act as a short in the case that the 12 volt power supply is connected to the RAMPS board backwards. In this case the short will draw excessive current causing the resettable fuse to trip. The goal of all this is to protect the rest of the circuit from the reverse voltage.
If you are certain that you will not connect the 12 volt power supply backwards then you can safely l
by
madscifi
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RAMPS Electronics
If you can know the manufacturer of the specific disks you can probably find their recommended soldering instructions.
Here is a link to the instructions provided by PUI Audio:
A link to Murata's instructions:
by
madscifi
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Powder Printing and Selective Laser Sintering
Welcome aboard and good luck.
Some comments about things that might not be clear from reading this thread:
1) 30-40 volts or so is good for driving the piezos (I don't know if you can use such a voltage with the board you have listed or not). Higher voltages might be useful just while starting out, but the higher voltages damage the piezos rather quickly.
2) Piezos on thinner plates seemed to
by
madscifi
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Powder Printing and Selective Laser Sintering
You absolutely can sell a product that is licensed as GPL. What you cannot do is restrict the buyer from exercising any of their rights under the GPL - giving away what you sold them, for example, or making their own derivatives. That usually makes it hard to find buyers as there is usually someone else willing to give away their copy. Commercial companies that make money off of GPL licensed code
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madscifi
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General
A Taig works fine as a printer - I used one to print out the parts for a Mendel. It took a long time, but that is really the only complaint I have about the setup.
by
madscifi
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Developers
"Needed," in this case, is not something that can be demonstrated by simple testing. If interrupts are enabled between the return of setTimer and the return of the interrupt invoking daa_step, then it is possible for an different interrupt to delay the return from interrupt. If this turns out to be long enough that the step interrupt fires again then you've taken the first step toward smashing th
by
madscifi
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Firmware - experimental, borrowed, and future
Although setTimer contains a cli, it restores the interrupt state via SREG rather than simply enabling interrupts as it can be called from both inside and outside of an interrupt. I'm pretty sure that cli in dda_step should be inside of a
#if STEP_INTERRUPT_INTERRUPTIBLE
#endif
conditional, as it is only needed when running under the interruptible configuration. However, in that configuration
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madscifi
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Firmware - experimental, borrowed, and future
Yes. Spiral printing has been done, however you'll have to write custom GCODE (or a program to generate custom GCODE). This only really works with single wall, unfilled object - pretty much exactly what you want for the body of a model rocket.
See this python script on github as a starting point.
The alternative is also doable. Take a look at the Jitter module.
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madscifi
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Skeinforge
While that is a nice board it is really not capable of doing 3d graphics or of super fast math. CPLDs just don't have the functionality. What you want to do those types of functions is a FPGA and possibly some additional ram. Papilio for Arduino looks like what you are looking for, but it does not look like it is going to reach its funding target.
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madscifi
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Firmware - experimental, borrowed, and future
I've run into one issue and I cannot decide how to deal with the problem.
Problem: The values specified on the Dimension tab of Skeinforge for the extruder retraction/restart are both distances. I think they should probably remain distances as I expect that the distance used for retraction/restart with a 3mm filament is about the same as with a 1.75mm filament. Can anyone confirm or deny this? I
by
madscifi
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Firmware - experimental, borrowed, and future
I don't envision this proposal as a replacement for Sprinter's M92. I'll try to include an implementation of M92 when I submit these features (assuming someone else does not beat me to it). While it is true that all of these functions can be replicated with M92 and some functions in the client I still think these provide a useful abstraction of two related problems - variable filament diameter an
by
madscifi
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Firmware - experimental, borrowed, and future
This proposal was originally posted on the main Teacup thread. However, the main developers of Teacup don't really care for the idea so I've created this thread for any additional discussions.
The original proposal can be found here.
At this point I imagine the following MCodes (I'm somewhat thinking out loud at this point):
M210 - E Volume Compensation Setting
Sn - The diameter of the filamen
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madscifi
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Firmware - experimental, borrowed, and future
Volume of a cylinder is: pi * h * r^2, so simply tell Skeinforge that the diameter of the filament is 2*(1/sqrt(pi)) (approximately 1.128379) and the values that Skeinforge outputs are volumes. Hopefully I've not messed up the algebra.
Actually, asking Skeinforge to output the diameter of the filament on which the distances are based as a M Code might be a good way to address the issue. It would
by
madscifi
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Firmware - experimental, borrowed, and future
I see the source of the problem a little differently. I view the E compensation functions much like the tool radius compensation codes (G41,G42,G43) of standard GCODE. The differences between filaments can be viewed as a parallel to the differences between worn tool bits. Skeinforge generates a plan specifying the placement of specific volumes of plastic (expressed as a length). The E compensatio
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madscifi
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Firmware - experimental, borrowed, and future
My repstrap extruder used teeth cut into aluminum in a brutstruder style arrangement. It successfully printed the parts for a Mendel and a large variety of other objects. To be honest I expected that it would not last very long, but it still works well. Note that I've only printed ABS with it, so I don't know if PLA would be an issue or not. On the other hand I've not really used it since it fini
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madscifi
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Plastic Extruder Working Group
M92 is really addressing a different problem, I think. While M92 could be used to make any/all needed adjustments for different filaments, it could also be used to adjust for GCODE that was generated in inches, but I don't think anyone would suggest using M92 in place of G20. I realize the comparison is not exact, but I do think the issues are strongly related.
I do agree, however, that the issu
by
madscifi
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Firmware - experimental, borrowed, and future
I've been working on some new MCode commands and I wanted to get some feedback on the ideas before submitting the changes on github.
Background: The new volumetric E control produced by Skienforge works really well. However, it requires that the GCODE be regenerated if you want to use a different filament that is a different diameter or that is a little harder or softer than that used when origi
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madscifi
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Firmware - experimental, borrowed, and future
This is really a Wiki question, but I could not figure out how to address the issue on the Wiki.
How/Who do I contact to request that a Wiki user be banned for spam? I've already reverted the one spam entry I noticed by the user. Is that all that is needed (that is, will an admin pick it up from that)?
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madscifi
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Administration, Announcements, Policy
There is no question about the IDE and the compiler itself - they are both open source. The only point of contention is the c runtime library. I don't believe that the c runtime is on github. There is nothing wrong, per se, with a proprietary runtime library - lots of open source software has been developed/used on systems with proprietary runtime libraries. However, I'd like to see an opensource
by
madscifi
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Firmware - experimental, borrowed, and future
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