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I had the same problem and replaced my bed with heat-proof glass
The glass cost 55$AU. I mounted it using some aluminium channel $4.25AU and some stick on rubber strips.
by
Greg Frost
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General
Even if you get granules to extrude, how do you make a filament with a consistent enough diameter for use with a 3d printer?
One method I though of is to have kind of a reverse extruder where the hot end feeds into a cooled PTFE lined tube of the desired filament diameter. The tube would then mold the filament to the desired cross section as it cools. With such a setup, it may not be necessary t
by
Greg Frost
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General
fdavies and jamesdanielv: Awesome thanks.
I now have this in my replace.csv:M101 M105;
M103 M105;
M108 M105;
and I modified RepRapArduinoSerialSender.py as follows:
block=block.replace(' ','')
block=block.replace("\t",'')
becomes:
block=block.replace("\t",' ')
This works great. It is fantastic not having to go through 20 mouse clicks to start a print.
by
Greg Frost
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General
Arvin Wrote:
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> Greg, sounds interesting. Pictures? Especially
> disassembled, would be great!
Here is the carriage with the "posts" (only 1 is really a post)
This shows the hooks on the extruder:
Here is the hook and eye attachment:
by
Greg Frost
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General Mendel Topics
I use skeinforge to slice and want to avoid having to open up the reprap host in order to send gcode to my printer so I wrote a simple batch file wrapper for send.py:
send.bat:
echo %1
C:\Python27\python.exe "C:\Documents and Settings\Greg\Desktop\reprap\skeinforge\fabmetheus_utilities\miscellaneous\fabricate\send.py" -v -p COM3 %1
pause
I then associated .gcode with the send.bat script so that
by
Greg Frost
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General
Sorry. I have moved this post to here because I don't think this was the right forum.
by
Greg Frost
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Skeinforge
0.2 mm layer quality with 0.4mm speed:
and some photos he posted:
by
Greg Frost
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Skeinforge
I just tried using a hole-punch to nibble bits off a milk bottle and it worked quite well. If you constrain the requirements to processing milk bottles I'm sure something far less elaborate would work fine.
by
Greg Frost
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General
www.arqtec.pt Wrote:
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> Hi
>
> Now I start my Mendel.
congratulations and welcome to Reprap
> I see many links to buy the shares of mendel
> someone can suggest me the best?
If you are talking about buying the printed parts, not many rival nophead's quality, However the accuracy of your machine will be more dependent on th
by
Greg Frost
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General
$20+P&H (If I can get it in an envelope it should cost $4.30AU if it is less than 125g or $6.50AU if less than 250g)
PLA colours available: black,green,blue,yellow,red,white,natural, clear.
Check this for my print quality:
by
Greg Frost
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Job Shop: I need stuff made!
I think that this is precisely why it would be better to transfer details regarding step timing to the controller rather than coordinates as is done with the current g-code implementation. Then you could do all of this heavy lifting maths in your PC and just come up with some curve-fitted approximations to the desired step timing sequence. The controller could then implement the step timing synch
by
Greg Frost
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General
What tape are you using? Cleaning kapton with acetone helps improve its stickyness for PLA. You really should heay your bed. If you have the laser cut mendel with the alu print bed, sticking a travel iron underneath is super simple and work a treat.
by
Greg Frost
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Reprappers
I have a lasercut plywood carriage and extruder and I have cutoff m5 bolts and made a slot with a hacksaw (so it is like a grub screw). I screwed these part way into the carriage to make posts that the extruder slots onto. I then have a hook and eye each side of the carriage to hook the extruder in place. The screws prevent lateral movement and the hooks hold it on. This works quite well and it o
by
Greg Frost
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General Mendel Topics
or too much tension can stall the extruder
by
Greg Frost
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General
You should be able to set Windows up so that you can double click a .gcode file and it uses send.py to send it. I will look into this because I hate the hassle of starting up reprap host selecting print gcode and navigating to the file when all I want to do is send the gcode.
by
Greg Frost
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Firmware - mainstream and related support
I dont know how old your firmware is, but at one point I think they upped the default baud rate. This means you need to be running firmware that corresponds with the host software (or change the baud rate appropriately).
by
Greg Frost
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General
expensive? If you print them they cost the same as spur/helical. herringbone has less backlash than spur.
by
Greg Frost
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General
You really are the master of simple comprehensive explanations nophead! Thanks.
by
Greg Frost
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General
nophead: I think you get better results with retraction than most people. Are you using the hotend with the tapered barrel? That may be key. I find if I retract too much I get jams (heat being pulled up the barrel? perhaps my barrel is not smooth enough at the transition zone). If I retract as much as I can to still have a reliable extruder it still oozes a little (although it is much better than
by
Greg Frost
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General
Perhaps it back-flows while it is not extruding meaning that you would need to restart further than you retracted, but your flow rate would be increased for the same stepper rate until the back-flow plug reached equilibrium again. Is your barrel diameter much bigger than your filament?
by
Greg Frost
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General
This can happen if you blow the mosfet controlling the heater. Do you have an LED associated with it? Is it always on (as soon as you power on the system)?
by
Greg Frost
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Reprappers
I adapted a wades extruder for mounting the glass nozzle to and attempted to print something, but it was pretty much a disaster. The heat traveled all the way up the glass nozzle and softened the carriage (which I only had fastened in one place anyway), this caused the (PLA) extruder to buckle and the print became quite inaccurate. I also noticed that whenever the extruder stopped for a while, it
by
Greg Frost
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General
How many samples went out?
How will we coordinate who prints what so that we end up with a full set of parts Mendel parts?
Should we print a Prusa mendel instead of an Ed mendel?
by
Greg Frost
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General
The dc chips seem to work OK for me, but I have done a couple of things to help that.
I found that the drive strength seemed to be pretty variable. sometimes it would work great and other times it would have almost no power. I think this is down to the fact that the software can send commands that control the PWM (which affects the strength of the drive). So depending on the sequence of things th
by
Greg Frost
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General
I still suggest turning off acceleration in the firmware. That solved it for me.
Here is the post I found that suggested it:
Also this forum post describes a more elegant solution than turning acceleration off:
by
Greg Frost
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General
I had to disable acceleration in the firmware because it was trying to do the z move quickly because it was decelerating from a fast x-y move. After I did that I think I saw a post somewhere saying you could do something with a homing code in skeinforge to somehow separate the xy moves from the z moves. I never pursued it because it works fine for me without acceleration. Sorry for the vagueness
by
Greg Frost
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General
The dual shaft ones work fine without getting in the way. All mine are dual-shaft,
by
Greg Frost
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General
The wood would need replacing occasionally. The hotend that was provided with my Techzone Lasercut mendel is an oak block with an M7 threaded hole through it. A teflon tube is screwed most of the way through and the brass nozzle screws in from the other side. Just recently, my hot-end crumbled out of the block for the second time, but it only took a few minutes to cut another block of oak, drill
by
Greg Frost
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General
Basically, your axes need to be at right angles. Other configurations such as deltas or rotating platforms will need special software or firmware.
by
Greg Frost
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General Mendel Topics