I heard can run slightly smoother. The a4983 current is rather low which makes it to have fewer applicabilities in my eyes. About a3984, never actually tried one, but i think i would prefer it to a4983, if it would be a fresh start. But again, that may be just me.by NoobMan - Controllers
Relays in solid state are kinda prohibitive in prices at least to me. Where i live the current *average* monthly salary is ~140eur. Using a fet (or maybe a Jfet or a BJT) as a switch - is already sort of a solid state switch anyway, not much point to double it. Furthermore, i imagine that if the fet (or such ~) on the board would be in a slightly different setup, it could be used directly withby NoobMan - Next Wave Electronics Working Group
Thanks again. I will be working on this then.by NoobMan - Next Wave Electronics Working Group
I was planning to use some relay that i got off some trashed boards. I was feeling that it wouldnt make a good life solution, and after you pointed at it, it became a certitude. So, i am looking for a proper solution, and i would rather do things properly. I am currently thinking of taking the outputs for heated bed, put them in w/e linear voltage regulator (got a bunch), and use its output toby NoobMan - Next Wave Electronics Working Group
I realize it would probably need a diff fet and would be for better practice -sort of speaking- to have the +V line being cut-off instead of having the gnd line being cut-off.by NoobMan - Next Wave Electronics Working Group
I am looking at the heater for heated bed, i think heater 2. I am under the impression that generally speaking, the 12v ~8A is a little too much, etc, so a second power source for heated bed would make more sense. Considering that, i think it would be better to have, just for heated bed, a different configuration for the transistor/fet ending. What i mean is to use it only as a simple switch,by NoobMan - Next Wave Electronics Working Group
Tested and works ok, the bed is heated by gcode and extruder keeps controlling it properly, works ok with host firmware so for the time i am satisfied. I can regard the ad595 again as a thermocouple ic that is compatible with me and mendel. I tested the firmware with ad595 for extruder and thermistor (pin3) for heated bed. So i dont know if the max6675 part works properly in dual sensor contby NoobMan - Controllers
I will then add a firmware here and it will include the firmware for the master, although i think it should work with the current one too. If you get a chance to use it and get it working, let me know.by NoobMan - Controllers
I meant either relay (mech) / opto isolation / or the use of fet (which maybe can be regarded a sort of ~). Good news is, meanwhile, thanks to getting tipped to look into the firmware, i found a way to have it working prorperly and stable. Got to search for related info and got these links and also . There is a sleep_mode() there that is interesting and i was almost close to start learning howby NoobMan - Controllers
I was also talking of a mechanical relay, as i have 2-3 used ones. The solid state are kinda way expensive and havent got to salvage any so far, so out of the question for me atm. Other isolation variants that are in my range (and thinking of general availability aswell) are something like the cheapest optocoupler ever, or even a good led+fototransistor under a bottlecap - or something like thby NoobMan - Controllers
I will take then a better pass over the firmware, triple check everything, and increase the clock timings alot. Next weekend my EC2.2 board will beg for mercy. Also, sir, thanks for this tip, and also for all the others you gave me and for your blog and everything else. Cant say how much i learned and how much i appreciate it all.by NoobMan - Controllers
Yup all i make will be somewhere on the wiki. Although nothing is particular and most certainly all i did already has been done lots of times by tones of ppls, regardless that, i just put it about the way i did it, if it helps anybody, or at least shortens the time others will spend on different matters, like images to etch the boards, few comments, etc. This will be on . About controlling theby NoobMan - Controllers
I am back on it so hopefully i will get to end of it in a few weeks. Yes, i wouldnt say i should draw any conclusions atm, but i am inclined to say at this point that if a dual sensor reading is needed, like in a thermocouple+another sensor, then max6675 would be better because it has its own adc, so in this setup each sensor reading would have an adc to itself. That is for EC 2.2 as in gen 3 (by NoobMan - Controllers
what files are you trying to compile? - coz there is a bunch of versions around, besides the last release or the last nightly build. by the mentioning of "PIDcontrol" function i think you are trying the niglty build, but i cant say for sure. I have even made a kind of stupid version myself (only bang-bang control) by chopping from stuff around, its posted in "Type K thermocouple [...]" named thrby NoobMan - Controllers
owens: - the adc is analog to digital converter, that is a number of 7 (analogue) pins on the atmel168 microcontroller unit ("mcu" - i guess it comes from that), and those pins are tied to a adc "block" or basically some square shape that appears on the internal logical schematic of the ic (integrated circuit); if the adc actually has a square shape or smth i pretty much doubt, but i think thatsby NoobMan - Controllers
I hope my struggle is temporarily as i hope to get to an end with it, as usually its said "the smart one gives up", so all i have to do i to be stuborn and stupid enough to overcome it, which is kinda my specialty Now seriously, I lack the inteligence and education so i have to put more work and more muscle and time to compensate. And tbh, i dont understand what i was writing either, i mix up thby NoobMan - Controllers
My stupidly retarded firmare with only the thermocouple - e.g. one analogRead to do, as standalone themometer (short outputs) : ========================================= Native lib Version = RXTX-2.1-7 Java lib Version = RXTX-2.1-7 comms: G-code: N0 M110 *3 dequeued and sent [0.000s/-1296483042859ms] comms: Response: ok [0.000s/0ms] comms: G-code: N1 T0 *27 dequeued and sent [2.719s/2719ms] cby NoobMan - Controllers
Oh sir, i have read your page at least 5 times top to bottm And datasheet and application notes AN274 and AN369 plus some datasheet and app notes of further analogdevices ics including the new one supposed to replace the 595, there are a few more ideeas about filtering the thermocouple wires noise, rc filter on it, 3-capacitors filter on them, etc, i passed to all that anyway, but i did some hby NoobMan - Controllers
I personally avoided mounting it near the extruder, as typically i dont trust datasheets haha, so i went for the alternative, which i believe is to extend the thermocouple wires by means of simple copper wires (copper should be used for this i think). I mounted the board along with the other electronics alltogether, still fairly close, and having the thermocouple wires cutted down to like 10 cm,by NoobMan - Controllers
In other words, i understand that you want to use a stepper ic /w spi like a3985? or else im not sure what would it mean, coz the mb pins could be enough for multi x for more than 3-4 axis, like hydra-mmm used like 7 or so i think. that could require a more advanced central mcu, so i would check if casianho had any success with porting firmware to his arm; on the overall this could make quitby NoobMan - Controllers
Having a separate stepper board to run the stepper motor, is not because my chip burned (i did replaced it), but because it (at least should) give better results - at least in terms of noise the motor makes, adjusting the values to motor, allows microstep, its simpler in firmware, etc. The stepper board is actually designed for a stepper, while that h-bridge was designed, i believe, primarily foby NoobMan - Controllers
any further testing results / considerations please? i would just love to find out more at this stageby NoobMan - Next Wave Electronics Working Group
to make the 10 pin idc to 3 pin .100" / 2.54mm cable: idc cable numbering starts with 1 being the red wire, the one near it 2, etc at one side: -insert a 10 pin idc cable into a 10 pin connector as normally would; then at some reasonable range, ->pins 1&2 can be kept on the stepper gnd, but not connected to mb gnd, just dont cut them but leave their ends open on noise consideration (bby NoobMan - Controllers
As i understand that you are not sure if the firmware on the board actually has the hack on it, or a way to upload other firmware, nothing is certain. Maybe the two a3949 have some "blowing" marks on them - or maybe you remember if they made some smoke at any point. If none is true, there is no need to call a blow component yet. Even so, determining exactly which one needs to be replaced may notby NoobMan - Controllers
imo, take a look at wade's extruder and it can be given to a machinist to be realised from dur~ aluminium. could use the .stl files even with distances drawn all over as a nice 3d technical drawing. or the main block can even be done "in garrage" from a 4-5-6 mm sheet and a ~30mm square bar. the dificulty resides in the gears, a cutter in modulo 1,0 or 1,25 might be needed depending on the distaby NoobMan - Plastic Extruder Working Group
I dont really have a clue with the temp rise that fast, but maybe the heater is too close to thermistor so thermistor just reads the heather heating up instead of actually reading the barrel temp. I think it should be a couple of minutes, not few seconds, ofc it depends on setup / heater etc, but still a matter of minutes. I think sda is step and scl is dir but better double check that. Have youby NoobMan - Controllers
Havent tried and not on my to do list, but if i would try that, and run into this problem, then i would go for an item i dont really know how to describe: Some cars have a "tube" to mechanically conduct a steel wire from one place to another with across a small drive gap: it is basically a high tensile spring covered in plastic (spring in the inside), usually long like 50 cm - 1 meter, and usuaby NoobMan - Plastic Extruder Working Group
Havent seen this anywhere, but adrian's design suffers from a series of issues: 1) there is always some kind of wobble and high play in the big gear movement possible reasons (even sinergic effects): - the M4 thread used is long (75-80mm) and too weak to have a proper tensile strength and distance from the closest bearing is quite high; - the bearings are not properly constrained (nor radialby NoobMan - Plastic Extruder Working Group
@ Mitch: for testing purposes, if you have MB and EC connected, startup and run the software, and play with "fan" and "heater" options, and you should see the respectively leds lighting up on B and C. You also can put a thermistor leads directly into thermistor connector and you should get some temperature reading, etc. Welcome and good luck!by NoobMan - Controllers
i seen you asked the same on ramps forum again on short, yes you can use any stepper driver chip with basically any of the motherboards either 1.2 or ramps or gen7 or whatever else motherboard setup. motherboard(s) would drive any of the common stepper chips or boards which have step&dir (e.g. not the advanced stepper boards and chips like a3985 etc - maybe not yet) basically you just neby NoobMan - Controllers