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I come here after seeing Bre blog message. I hope Kimberly release the source files.
by
casainho
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For Sale
rocket_scientist Wrote:
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> casainho,
> have you already forgotten my post on page 5 of
> the heated bed discussion?
>
> 16 x16 zone heated bed.
>
> My idea was to attach large numbers of resistors
> in columns and rows to small blocks of aluminum.
> The use a high temperature glue to bond the whole
> lot to a
by
casainho
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General
mccoyn Wrote:
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> This could be a good idea to return to the idea of
> multiple heated zones. Print a part in zone 1,
> then let it cool while printing in zone 2. If you
> have a large part, it can cross multiple zones and
> use the entire bed, but you will have to wait for
> it to cool before you can print something else.
by
casainho
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General
> Today I removed with easy another piece, but this
> time I let the heated bed to cool. Last time I had
> problems to remove, I didn't let it cool... maybe
> we need to let the heated bed cool before try
> removing the printed piece.
And yesterday I let one big piece cooling during all nigh. This morning it was to much easy to remove it :-) -- I think that having a removable heat
by
casainho
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General
nophead Wrote:
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> It can be hard to remove ABS from Kapton. That is
> why I mount the Kapton on a flexible steel sheet
> held down with magnets onto the aluminium. Before
> that I had to knock the parts off with a piece of
> wood and a hammer!
>
> Lower bed temperatures make the object stick less
> well and warp more,
by
casainho
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General
VDX Wrote:
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> ... i think ataching a focussing lens and cutting
> is simpler than the powder-handling for
> sintering.
>
> For testing it's comparable ... but with cutting
> you have much more toxic gases you have to vent
> ...
Maybe have the machine near a window?
> Here in Germany i can give away a 'naked' diode
by
casainho
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Laser Cutter Working Group
I think that electronics are easy for us, DIY. And since we have already the Mendel/any other CNC, should be easy to mount the laser fiber on the head.
Price of the system is very important...
What do you think would be easier and cheap to do, laser powder 3D print or laser cut?
As for laser powder 3D printing, we have the difficult to find PLA/ABS powder and to build the need structure for th
by
casainho
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Laser Cutter Working Group
I still don't know what I do like more, ABS or PLA. I think I prefer PLA because of its biodegradable... and I would like to know what is more toxic when we are printing.
PLA is better for printing, less warp and less power needed on heated bed. Also it is easier to remove from heated bed.
by
casainho
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General
VDX, when you have something working, I may follow you :-) -- so please think on something very simple to start, and you may have a few more people working with you :-)
I am interested on laser powder 3D printer and laser cutter.
by
casainho
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Laser Cutter Working Group
VDX Wrote:
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> ... i've received some 5Watt-diodes, soldered a
> simple driver and made some images with an
> unfinished (rough breaked) fiber emitting 2Watts.
>
> The LaseCutter-Wiki is updated and atached is a
> photo showing how 2Watts power without any
> focussing burns POM in 5mm distance from the fiber
>
So you
by
casainho
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Laser Cutter Working Group
mccoyn Wrote:
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> > Yesterday I printed a relative big piece for
> Mendel Z axis. It was very hard to remove it from
> Kapton tape... and I used 110ºC on Heated Bed.
>
> Did you allow the part to completely cool before
> removing it? As I remember, Forest did this and
> the ABS shrinks as it cools, breaking it free fr
by
casainho
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General
JohnWasser Wrote:
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> I found out the hard way that the MOSFETs on the
> Extruder Controller (V2.2) cannot handle 3A @ 12V
> for more than about 20 seconds before they
> overheat and shut down. They work fine at 2A but
> with 6Ω of nichrome (two stretches of 12Ω in
> parallel) my heated bed is taking a LONG time to
> heat
by
casainho
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General
Cefiar Wrote:
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> Any chance of doing some measurements over time
> with lid vs not? It'd be interesting to see the
> sort of difference it makes.
Sorry, I have other much more important problems to resolve now, like non working extruder heater -- I am being printing my Mendel parts :-)
> Also, what did you use for the lid? Size
by
casainho
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General
Hello :-)
I think many of us would like to have a few extruders, so we can quickly change from printing PLA to ABS, etc. Also changing the nozzle hole size would let use printing with more quality VS printing time.
If someone could build a system where nozzle is quick replaceable (and no need to change the thermistor) ...
NOTE: Makergear have one kind of thing for the heater.
by
casainho
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Plastic Extruder Working Group
rocket_scientist Wrote:
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> casainho
>
> Those look like very nice boards to start working
> with. However, every time I try looking for
> products with the numbers you gave, all I find are
> processor ships (at surprisingly low prices! But I
> would like to work with one of the breakout
> boards, especially the one
by
casainho
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Controllers
There are two a wiki pages that you should read before making/assembling/use your extruder - 1st: Mendel Extruder and 2nd: Mendel User Manual: Extruder.
And please, if you had a problem and a solution, write it on 2nd page: Mendel User Manual: Extruder! If you just have a problem, ask first on this forum or IRC channel for a possible solution/ideas.
Thanks.
(TO ADMIM: can this message be on to
by
casainho
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Plastic Extruder Working Group
Hey, nice! Thanks for sharing :-)
Could you please write/resume this info on the wiki page Help for Extruder?
by
casainho
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Plastic Extruder Working Group
Cefiar Wrote:
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> Has anyone thought of putting a lid over a heated
> bed during the initial heating? Could this help
> reduce the initial time to get it up to temp?
It works very well! It is much more quick on my 150x150x15mm aluminium heated bed :-) -- When I have it at 110ºC and ready to print with ABS, I remove the lead and I qui
by
casainho
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General
mccoyn Wrote:
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> How is your extruder mounted to the CNC?
It's fixed. Sorry, I can't explain with my poor english.
> In the Mendel, the extruder is mounted between two
> steel rods. If the nozzle gets stuck on
> something, the rods will flex and the extruder
> will rotate around the X-axis. The result is that
> the noz
by
casainho
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Plastic Extruder Working Group
Tim James Wrote:
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> I would be thrilled if someone would please post
> the Solidworks files for Mendel. Otherwise I had
> planned on reverse engineering the files from the
> .stl files. Native files will allow us to run FEA
> on parts run kinematics models. Look forward to
> seeing the native .sldprt and .sldasm files!
by
casainho
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General Mendel Topics
james glanville Wrote:
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>
> -heated-bed.html
>
> Here's my blog post on the subject, the photos
> aren't great because I tend to work on my printer
> at night when the light is terrible.
Ok, thanks! And I added a link to that blog message, because your heated bed is almost near the one described on RepRap wiki.
I also ad
by
casainho
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General
james glanville Wrote:
I had a
> free sample MAX6675, and the thermocouple was only
> a few pounds, and I'd like the flexibility to try
> reflow soldering on it, and the TSIC101 would burn
> out at those temperatures. I use an arduino for
> extruder and bed control, with a 16x2 lcd so I can
> see what's going on. I'd post my code, but its
> probably useless as most of it is
by
casainho
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General
MarcusWolschon Wrote:
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> casainho Wrote:
> > 12V/108W from a PC PSU? I was afraid it would
> not
> > work... maybe there could be some problem, I
> don't
> > know...
>
> 15-24V(manually adjustable) 120W from a universal
> laptop power supply
> for 40eur (in an expensive shop).
> Works well.
And I am
by
casainho
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General
james glanville Wrote:
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> My heated bed doesn't differ too much from that
> one, mine is 2mm aluminum,
You didn't bloged yet as you promised, right? ;-)
Your 300X300 aluminium sheet is for Mendel? in what printer are you using it?
Could you get me a sheet of 4mm, of the size for Mendel? looks like is relative cheap... I can't find on
by
casainho
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General
james glanville Wrote:
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> I think its important to be able to able to
> maintain working temperature with a small fraction
> of maximum power input, so you're not waiting for
> ages. I'm using 12 1ohm resistors in a 3x4 array,
> 1.33ohms in all. At 12V, the 108W still takes a
> minute or two to get to 55 degrees, I'd recomme
by
casainho
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General
> Has anyone thought of putting a lid over a heated
> bed during the initial heating? Could this help
> reduce the initial time to get it up to temp?
I didn't remember to do such think but I will tomorrow :-)
by
casainho
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General
Ok, I went and did build it:
Since my prints have blobs and springs, sometimes the extruder noozle was going against them and causing problems, like changing the noozle position. I decided to try make a kind of flexible extruder, using springs.
It works perfectly! If there is something in the path of extruder, it simples goes over some side or go up, then the springs returns back the extruder
by
casainho
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Plastic Extruder Working Group
VDX Wrote:
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> ... marginal update: - the shipment of the
> 5Watt-diodes delayed, so i tested soldering and
> wire-bonding with my 50Watt-laser at 5 Watts and
> 10 Watts with defocussed beam to get nearly the
> same conditions as with a diodelaser.
>
> 5Watts CW at 1070nm (diodelaser=975nm) is enough
> to melt a 0.5mm
by
casainho
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Laser Cutter Working Group
grael Wrote:
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> At some stage, I want to do a first revision of
> the board, and would welcome suggestions.
I think that we should go with cheap and powerfull (than actual AVR Arduino) ARM Cortex M3. NXP LPC have a few ones, ST also. Xduino is a Arduino using ARM Cortex from ST :-)
Why can't we develop our hardware and put the PCB on
by
casainho
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RepRap Host