It's important to see and understand your setup! Thanks. You really look like a "madscifi" :-)by casainho - Powder Printing and Selective Laser Sintering
madscifi Wrote: ------------------------------------------------------- > Dalek producing single drops of water, pointing > down (the animation is a fairly accurate record of > the orientation), 31 volt, 500 us pulses. Great work on recording that!!! Thanks for sharing and helping us to "see" :-)by casainho - Powder Printing and Selective Laser Sintering
I also think that heater brass barrel N-RR2 is the best, because is longer and so PTFE can get cooler, also Mendel X carriage is longer and so barrel need to be longer! But I THINK THAT N-RR2 is wrong on the face that screws on PTFE! That face needs to have thread and not like as actual, were hot/melted plastic can go between PTFE and brass barrel, ended up like on this picture:by casainho - For Sale
Good!!! My port is working for enable with host software the heater and reading the temperature. I am still receiving this error from host software. I need to work this error!! After I need to start testing the stepper motors, but for that I need to wire them to the board.by casainho - Firmware - experimental, borrowed, and future
Just to say I ceased to idea (for now) to use this head for PCB. I found that using a 1000€ 40W CO2 laser may give the results I am looking for. I am still interested on this work and I am following this forum message. And as you may know, Makerbot and RepRap, both have now software and heads for pen plotting! Later, if this piezo print head works, it may exchange the pen plotting technology, siby casainho - Powder Printing and Selective Laser Sintering
reifsnyderb Wrote: ------------------------------------------------------- > At the present, I haven't had any plans to make a > heater block, similar to Nopheads design. I have > made some brass heater blocks, with a heater > resistor installed, but they are very experimental > and I don't advertise them. The heater block, > that I have made, is basically a block of brass >by casainho - For Sale
Traumflug Wrote: ------------------------------------------------------- > Even better would be to tweak RepRap Host to be > more tolerant on answers. No way, I want the board to be perfectly compatible with RepRap software. I prefer to just need to tweak firmware instead of firmware + software. My idea is to make something that "just works" so everyone can access to/use it.by casainho - Firmware - experimental, borrowed, and future
I got comms working, at least I believe so. I need now to start testing and see what is missing, since I didn't wrote any drivers for my board.by casainho - Firmware - experimental, borrowed, and future
Triffid_Hunter Wrote: ------------------------------------------------------- > I highly recommend you ignore all that for now, > and wrap your head around the ringbuffers (serial > tx/rx buffers and dda queue are both ringbuffers) > and gcode parser I were able to build all the code, but for some reason the communications with software do not work correctly, although I can see the mby casainho - Firmware - experimental, borrowed, and future
sersendf() is working. I am now trying to understand DDA code. I am sending a screenshot while I was doing debug/verifying program running:by casainho - Firmware - experimental, borrowed, and future
System should be able to measure sensors without heaters, like for measuring the temperature of Heated Room. On Heated Room. One can use a fan or not to remove the heat from the room.by casainho - Firmware - experimental, borrowed, and future
I am trying to understand the code, trying to build it for ARM. I have many questions and I would love to chat in real time with one of you both. Can we chat on IRC RepRap channel? or maybe on gmail chat? (my e-mail is casainho gmail.com). Thanks.by casainho - Firmware - experimental, borrowed, and future
> All you need to make your own is a saw, a drill > and a tap. There is no lathe work necessary. Thanks for the idea/info. I have all of that, less the tap. I have to buy the aluminium + tap. Yeah, I don't have a lathe, sure :-) > > Hmm, I did that in past. I still believe that a > > cooler PTFE/PEEK is important. Would be great > if > > brass get cold in the end! &gby casainho - For Sale
nophead Wrote: ------------------------------------------------------- > Why don't you just use Brian's hybrid insulator > plus the heater block? You then don't need wires, > nuts and washers. The PEEK outer casing is strong > enough and the PTFE liner keeps it slippery. ?? You are saying this, but did you have one and are you using it daily? > Rather than more power you shouldby casainho - For Sale
reifsnyderb Wrote: ------------------------------------------------------- > Hello, > > Is it possible that the brass barrel got loose? I > would try to tighten the hose clamp a little > more...maybe even when the PTFE is still warm. Sorry, didn't understand what you mean. > I have not pursued making another type of extruder > hot end as both the Mk5 is out and there reaby casainho - For Sale
Hello :-) I do need a reliable extruder and looks to me that the way to go is "PTFE inside brass barrel" :-) I did rebuild my extruder with your "power resistor heater block" and it works very well!! Is much better than using nichrome wire. Just the power resistor needs to have lower value, lower than 5R6, maybe 4R7. My problem is now backflow of ABS or PLA, and it even flows between PTFE aby casainho - For Sale
What is for the code on "copier.c" and "copier.h" files? About PID values, is the RepRap Mendel software/firmware using a GCode to save that values on hardware/firmware? if not, what others softwares do it?by casainho - Firmware - experimental, borrowed, and future
Traumflug Wrote: ------------------------------------------------------- > I've just removed that, it was unused. Good. There are other files with them. Who are the ones developing and testing this code? Later I would like to have beta tester of my electronics, if I ever produce them. I would love to provide the electronics to the developers of this code, at a small cost. It's really goodby casainho - Firmware - experimental, borrowed, and future
Traumflug Wrote: ------------------------------------------------------- > There is (almost) no library usage at all. Just > the bare metal. But mendel.c inclues: #include stddef.h #include stdint.h #include string.h I guess it's header files for a avr-libc, right? My problem is getting a working libc for ARM... emt Wrote: ------------------------------------------------------- >by casainho - Firmware - experimental, borrowed, and future
Triffid_Hunter Wrote: ------------------------------------------------------- What are the external libs you are using? just AVR-LIBC? I am having problems with ARM toolchain libc... but I have Serial.print() (and other Serial methods working). I may switch to your code, the disadvantage "and doesn't yet support a diverse range of hardware configurations" it's not for me, as I want to focus juby casainho - Firmware - experimental, borrowed, and future
I am using 5D (original RepRap Mendel firmware) with acceleration and I like it. Seems to work good.by casainho - Firmware - experimental, borrowed, and future
I am trying to port the RepRap firmware for ARM Cortex-M3... but I am having problems because of Arduino libs and C Lib I have. Luckly I have JTAG debug which helps me a lot ;-) I like your code, it's more easy to me to understand and hack. What are the disadvantages of your code when compared with "official" one? does the print quality is worst or something?by casainho - Firmware - experimental, borrowed, and future
reifsnyderb and VDX, I believe we should be able to print in plastic ABS the piezo housing. We then need some kind of nozzle or metal sheet with one hole of 0.1mm (or no more higher than 0.25mm). If any of you can provide it to us, would be great. I just can show the pictures from johnrpm and madscifi prototypes that did printed, you can take ideas and make something near to that: FULL SIZE imby casainho - Powder Printing and Selective Laser Sintering
VDX Wrote: ------------------------------------------------------- > ... i'll try with the 0.3mm-sheet - i can mill > squares or disks out of the sheet, what's better > for you, and which size/diameter? 0.3mm sheet? I would prefer some brass or aluminum of 2 or 3mm thickness. Since it is to glue to print head body of ABS plastic, that both materials may not be well glued, right? anyoneby casainho - Powder Printing and Selective Laser Sintering
VDX Wrote: ------------------------------------------------------- > ... i've already milled 2mm POM, 0.5mm aluminium > and 0.3mm brass with the 0.3mm-millbits ... and > drilling should work until maybe 3mm (max. length > of the threaded piece). Would you be able to provide us a nozzle of 0.1mm diameter hole, in brass, just like the one johnrpm did for his acrylic piezo housing? (sorby casainho - Powder Printing and Selective Laser Sintering
johnrpm Wrote: ------------------------------------------------------- > > > casainho Wrote: > > > 0.343mm? -- it's nice to know you can drill > such > > small hole, because before we would need to pay > > $150 for 10 nozzles of 0.25mm just for try make > > the same you just did :-) > > > 0.050mm not 0.25 Yeah, sorry my mistake/forgot. Even thatby casainho - Powder Printing and Selective Laser Sintering
madscifi Wrote: ------------------------------------------------------- > casainho Wrote: > -------------------------------------------------- > > Ok, but can you guess the size of hole you did? > > and the size of drops? > > > > A #80 drill bit is about 343 um in diameter, so > the hole will be somewhat larger than that. I did > a quick test and captured soby casainho - Powder Printing and Selective Laser Sintering
madscifi Wrote: ------------------------------------------------------- > I used this design to covert the output of a > variable dc power supply to a high AC voltage, and > a standard diode bridge and filter capacitor to > convert back to high voltage DC. Nice! This are cheap and simple electronics :-) It's very good to couple to any other board, because we can just use any microconby casainho - Powder Printing and Selective Laser Sintering
madscifi Wrote: ------------------------------------------------------- > 1) The driver for this device uses a "high" > voltage power supply and a mosfet to drive the > piezo directly, so the pulse profile is likely to > be significantly different from the profile > generated by a driver design that uses a > transformer to drive the piezo. High voltage here > means 50 to 80by casainho - Powder Printing and Selective Laser Sintering
VDX Wrote: ------------------------------------------------------- > ... we're still at the inkjet head, but there are > many methods firing droplets out of a nozzle ... > some, like piezos, are a bit more complicated, > other, like heated micro-bubles (with a resistor > or even a laser), are something easier to realize > Because after seeing the video registered by johnrpm prby casainho - Powder Printing and Selective Laser Sintering