rhysjones Wrote: ------------------------------------------------------- > Casainho I don't see how someone being a beginner > or having access to another printer is relevant. > If something isn't circular its fairly obvious and > easy to measure. Also, many experienced people > have said they don't have this issue. I'll stand > by what I said on the wiki, If it was a design &gby casainho - General Mendel Topics
brnrd Wrote: ------------------------------------------------------- > I'm just a beginner compared to most people in > this forum. I started building in December and I > was able to produce working parts in less than a > month that I have been using for my research. > Thanks to the efforts of people like you in paving > the way and sharing your experience online. My > softwby casainho - General Mendel Topics
Buback Wrote: ------------------------------------------------------- > both your CNC machine and the UP printer use > different software than a mendel. have you tried > multiple software solutions? I used the same software on my CNC -- Skeinforge. Also Skeinforge simulation and RepSnapper shows me round holes, so, the problem is for sure mechanical.by casainho - General Mendel Topics
Buback Wrote: ------------------------------------------------------- > What exactly do you think is the issue that is > preventing you from printing successfully? If we > can fix your issue it will help everyone else. I have a CNC from which I printed my Mendel parts. I also have an UP printer. Both of them do that same holes round. I see others with the same problem as me and withoutby casainho - General Mendel Topics
brnrd Wrote: ------------------------------------------------------- > > I have the same problem, circles not being > circles and straight lines not being straight sad > smiley > > > How fast is your feed rate? Does it improve if you > slow down? Feed rate = 8mm/s. It is slow already so I didn't went lower, since I print other layers at 25mm/s.by casainho - General Mendel Topics
nophead Wrote: ------------------------------------------------------- > Just because you are too stupid to make your > Mendel print circles doesn't mean there is > anything wrong with the design of it. Mine prints > hundreds of circles a day and they look pretty > round to me. You mean me and all others (the ones that started this message for example, Leonardo, etc) are all stupiby casainho - General Mendel Topics
After many hours trying put my Mendel printing correctly, I quited. I were also in chat with Leonard from Portugal, because he were also having the same problem and tried to figure it out. Seems there are no solution or it is very hard for a person with my knowledge/technical to put it working. I just wrote a warning about this problem on Mendel 1st page: I wish I did know about this before deby casainho - General Mendel Topics
Triffid_Hunter Wrote: ------------------------------------------------------- > yeah we have lots of issues with host software all > having different but very particular expectations > of what firmware should say.. I hope Libreprap will help on this question. When porting this firmware to my ARM board, I found that I couldn't put my firmware working with RepRap software and RepSnapperby casainho - Firmware - experimental, borrowed, and future
nophead Wrote: ------------------------------------------------------- > > > Too little motor current. > > > > I guess not, because that would mean missing > steps > > by motor, right?? -- if was missing steps on X > and > > Y, then on layers after (Z increase) I would > not > > get almost the same X and Y "plotting". Yeah, I > > didn't saidby casainho - General Mendel Topics
nophead Wrote: ------------------------------------------------------- > You have backlash on your X axis. Ok, good! I see now that circles at Y movement are all perfect but on X part movement they are all bad! Ok, monday I will see this and I will post the real problem/solution. Then I may also write this on Mendel Manual: You should be > able to see it just by turning the motor by hby casainho - General Mendel Topics
I have the same problem, circles not being circles and straight lines not being straight Here is the gcode seen on Skeinforge: And just the first layer plotted with a pencil: My X and Y gears were printed with highest quality of PP3DP UP Printer, with 0.2mm layer. Before I had other gears which were far from perfect/round and I still had this kind of problems. My belts are tight to avoid baby casainho - General Mendel Topics
Traumflug Wrote: ------------------------------------------------------- > There are quite a number of people apparently > using FiveD on Arduino successfully now (including > me), but all these combinations of electronics and > firmware are somewhat unknown and fail on slightly > different combinations. Even minor > incompatibilities tend to drive people away pretty > quicklby casainho - Firmware - experimental, borrowed, and future
Architect Wrote: -------------------------------------------------------I > have 2 pololu steps at 1/16 steps using normal > Mendel gears and a T5 belt, I also have my z axis > and extruder on a 1/8 step Sparkfun "easydriver" > can anyone who has done the work in their config > tell me what they have their STEPS_PER_MM and > MAXIMUM_FEEDRATE are set at? I'd appreciate the > hby casainho - Firmware - experimental, borrowed, and future
madscifi Wrote: ------------------------------------------------------- > Thanks. > > My immediate goal is to get the Mendel I've been > constructing working with some sort of gui > interface. Once that is achieved I'd be interested > in working on new firmware, but at the moment I > want something that is known to work. Trying to > debug firmware and stepper drivers andby casainho - Firmware - experimental, borrowed, and future
aka47 Wrote: ------------------------------------------------------- > On Bootloader versus programmer. My board have that addressed, using USB bootloader that works as a USB Mass Storage Device on PC, just like a USB flash drive. User just copy-paste the firmware to board :-) Read more here:by casainho - Firmware - experimental, borrowed, and future
VDX Wrote: ------------------------------------------------------- > ... the 500mW@808nm is good for this too - with > 445nm you have: You wrote advantages: - better visability of the beam/spot, so you'll have better security-relations (security is very important!!!!) - shorter wavelengths, so better focus (important to etch very small lines/dots, higher resolution, more power when betteby casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- i think the absorption with 445nm is > much better than with 808nm or 975nm, so a blue > 445nm or BluRay 405nm diode will work much better > with black paint on copper than IR-diodes ... Ok, but I am seeing 808nm 500mW costs 11€ on Ebay while 445nm and 405nm are much more expensive, like 5x times more! If a 11€ 808nm diby casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > When the collimator arrives, i'll test with other > lenses - i hope to receive then a spot diameter of > 0.05mm, so the energy density and cutting speed > should increase dramatically 0.05mm should be great for PCB black paint etching. And if you can cut 0.3mm plastic with that laser diode then I am almost sure it wby casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > ... try to find a blue diodelaser with 1Watt@445nm > - they'll be sold occasionally around 40 Euros. Right now I just bought from another seller a 500mW 808nm diode, for 11€. It's from Europe and he seems to be very well rated. I decided to invest a bit more on 808nm because I have goggles for it and also I want to comparby casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > casainho Wrote: > > Do you know/have experience of some trust online > shop? > > ... not really - for unknown seller i'm checking > for counts and ratings and sometimes the > content/design of the offers. > > Most business laser-related is performed with > users of specific (sometimes closed) fby casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > Hi Casainho, > > ... ebay is like a lottery - i've bought several > parts on ebay too ... all functional and sometimes > much cheaper too - but you have to find trustable > sellers ... Do you know/have experience of some trust online shop?by casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > Hi Casainho, > > for paper i'll recommend a 445nm-diode with 1Watt > power - i've got one for 30 Euros and you'll find > them in ebay too. You know, I bought on Ebay my diode laser and it do not work... > They are 'bright-blue', so really good visbible > and the wavelength is much better absorbed by >by casainho - Laser Cutter Working Group
VDX Wrote: ------------------------------------------------------- > Update: > > ... i've sold my first housed 5W-module - it's > similar to the one in the last linked image with > switches connected to the LM317-jumpers, so i can > select max. oputput easy from 1Watt to 5Watt in > 1W-steps. I am looking for a cheap laser that be able to cut paper, etch black paint, just liby casainho - Laser Cutter Working Group
Triffid_Hunter Wrote: ------------------------------------------------------- > My firmware can do that without floating point, And my code is a port of "FiveD on Arduino" from Triffid_Hunter (and others developers) -- so, my code is a kind of "FiveD (on Arduino) on ARM" :-) But I added floating point to some places... I don't see the need to go without it on ARM - there are almost no limitaby casainho - Next Wave Electronics Working Group
uSDCard arrives Now there is an uSDCard that stores "config.txt" file with configurations like steps per mm and maximum feed rate of each axis. Now you can configure your 3D printer just by editing a txt file - no more need to build the firmware sources and program the microcontroller. This uSDCard works also as board internal memory and in future will store GCodes files, letting printer workingby casainho - Next Wave Electronics Working Group
nophead Wrote: ------------------------------------------------------- > I can get those step rates with my 25MHz 16 bit > micro so it should be a walk in the park with an > Arm. What step rates? can you please give numbers? ARM maybe be faster than yours 25MHz 16bits, however this ARM will have others tasks as USB, SDCard, FAT, etc... so it needs all that power.by casainho - Next Wave Electronics Working Group
> Question, are you running your pololus at full > step, or microstep? if microstep, how fine? At 16 > microsteps, you will of course need 16x more > pulses to go 1mm, but microstepping makes motors > quiet and happy. At 16. For my motors, they'd move Mendel > at about 40 pulses per mm, so if the current > firmware really can put out 10,000 steps per > second, I'll beby casainho - Next Wave Electronics Working Group
madscifi Wrote: ------------------------------------------------------- > Details are here: > > The "obvious in hindsight" but I certainly never > thought of that solution to the problem of > defining a leak proof chamber by simply using an > o-ring to both seal and define the chamber is > wonderful. > > I would suggest using a piece of transparent > plastic for tby casainho - Powder Printing and Selective Laser Sintering
Original message of Adrian Bowyer on RepRap dev mailing list: I had a bit of a deranged-brainstorm-moment a couple of days ago when I foolishly imagined that it should be possible to make an inkjet head in a RepRap machine with no tricky manufacturing steps. Rather surprisingly, it turned out not to be deranged or foolish after all. It works :-) Details are here:by casainho - Powder Printing and Selective Laser Sintering
Kontraptionist Wrote: ------------------------------------------------------- > Hello, > > This is indeed an exciting project, and is the > answer to many concerns I have, particularly about > the limited number of pulses per second that can > go in to each axis using the Sanguino. I have some > very nice motors that I'd like to get running on a > rep-rap like system, butby casainho - Next Wave Electronics Working Group