there is no hardware change in mb regardless of what stepper driver boards are used; all you need is to (properly) connect the mb 1.2 to stepper driver boards; just when loading the firmware one has to specify the for each axis, and that depends on: - what kind of stepping the board does (full, half, 1/4, 1/8, 1/16 etc) - drive pulleys being used however, firmware tuning is easy and mandatoryby NoobMan - Controllers
maybe enable pin gets to 5v aswell with the rest - when its 5v, only the power led will be on the stepper board, and the outputs will be disabled i think ramps knows to make it low when it wants to move a motor, but otherwise if its not already low by default / when powered up, you may need an active way to make it low - to put it to gnd or smthby NoobMan - Controllers
Have you done all that is here ? You didnt mentioned anything about the MB jumper, is that set yes? Above the header. Says "autoreset enable" near it. The picture in ladyada forum shows that jumper is missing. Try solder a wire between the pads and see maybe it works. But on long term i think you need a jumper there anyway (in normal operation its off, only on if programming). Since its initiaby NoobMan - Controllers
Have you checked this for arduino mega with db25 for ecm2, with firmware etc: Hydra-MMM /droolby NoobMan - Controllers
I believe it works as intended. As a way of speaking, Z axis takes alot more "motor action time" than the others to move a distance, because of both gear ratio and the fact it uses M8 thread. But its ok because Z is just one layer advance after another, small increments, and there is no need for actual speed on raising the carriage. The motor itself does run "longer" but because its final machinby NoobMan - Controllers
I havent followed exactly everything on the list, but its naturally pretty much the same requirements with the MB2.4 and EC3.6 currently from makerbot. I would check that - its basically a arduino mega board (2560?) with a ec 328. Is there any chance that as a platform may be up to the task - maybe with some changes? If you would go for that, and if you are like within europe, i am planning to maby NoobMan - Controllers
How can one fit a peltier square onto extruder m6 thread? does it works to drill a hole in the peltier module, i meant wont it be damaged?by NoobMan - Mechanics
Since we are actually using 3 (actually 4) stepper driver boards, wouldnt make more sense to have a common rail line dedicated with a small addition of features of protection like over-voltage (/-some bemf at some extent); even maybe one diode for reverse polarity, etc? Can anybody with some inspiration come up with something like that? Further on, would be enough having just one 78L05 for 3-4by NoobMan - Controllers
Jacky2k Wrote: ------------------------------------------------------- > @Korba: About which generation electronics are you > talking? > Somewhere I have a remake (selfmade) of the Gen3 > with Vias sized at least 0,8mm and no via under > any component. Just this way we were able to make > the pcb our own. Is it possible to upload it to thingverse? or to edit this page here andby NoobMan - Next Wave Electronics Working Group
I guess i will have to open my head to pcb milling. Although i am more like traditionalist in the sens of "shortest way is the one i know". I am working on a stiffer cnc router -eta in the spring- and i should certainly test pcb milling on it then. Thanks for the push on that direction, i dont think i would of gone for it otherwise. Edit @Korban: for via 0.5mm is good, but 0.8 should work tooby NoobMan - Next Wave Electronics Working Group
Its extremely tedious process but can be done. But that stuff ends up like being from 60's and pretty much looks ugly . Can make 4-6 layer using '100 cutted single pins between as vias. Internal part needs to be done first, rather in lead free. Making 4 layer is easier with 2 single sided and one double side in between. With 3x double sided, the issue is the back side of the exterior boards whicby NoobMan - Next Wave Electronics Working Group
I find myself also double sided toner transfer very easy. Then why do we bother with single sided issues when double sided has plenty of advantages. Is it worth the complications? Advantages: can get smaller traces lengths, more compact component population, smaller form factor Disadvantages: making some vias (no. of vias can be minimized); eventual increase in milling time (not significant etby NoobMan - Next Wave Electronics Working Group
About usb to serial, how about ATMega8U2 as in the new arduino uno and mega 5th stepper board: as there some peoples discovered a new feasable way to dissolve PLA and make use of it as support material, this could be of more use in the future than previously thought @Lanthan: double sided milling a board - how is it done, is it complicated, is the margin of error too big? i dont have any pcb miby NoobMan - Next Wave Electronics Working Group
Indeed the drivers currents are hard to get, frankly i am no good at the area. I had read that thread with pololu currents and the posts on that debate but i wouldnt allow to adventure myself on the issue since i'm rather noobish at it. I think i was probably unsuccessfully trying to point out that while normally, as an "approach" one would set the driver board around the motor and application (by NoobMan - Controllers
Nophead is right, i think his approach is a better perspective. I avoided setting the max current because with overkill heatsinks and a3977 allowing slightly bigger max currents, the motors were kinda much too hot to my appreciation, so i positioned myself relative to that aspect alone. For myself i just roughly appreciated half current - half torque thingy out of like ~0.4Nm to get half currentby NoobMan - Controllers
Imo, those 3d commercial printers selling under 1200$, are not reprap's competitors, those are actually derived from repraps. The way i see it, they follow reprap (not vice-versa). ECM is great, and a board with linux as reprap controller is godlike - and i would say it has the potential to simplify many current issues, and to develop areas wich can only be dreamed of today. Its *the* way to go,by NoobMan - Next Wave Electronics Working Group
I would say it depends on what motors you have - e.g how much current you set for them to get the desired torque. The point is to run the motors with the lowest current possible, to avoid motors getting too hot. As a result of that, the driver chips wont heat up much either. I have 12 pololu driver boards but never used any, not even so much as for testing - yet. Instead, i use the stepper driby NoobMan - Controllers
I think there are some arduinoscope(s) - - Havent tested them myself, just something on my to do list sometime, so couldnt say much about them atm except that depending on what is needed, they may look acceptable.by NoobMan - Controllers
it may be just me, but the current extruder technique seems rather wrong in several aspects, and needs improving it can certainly improve for reliability, although not sure it can improve in quality too much, in the context where every single extruder is made basically only from what is available to a person, rather than best choices mats heard a nice comment in some movie with austronauts on tby NoobMan - Mechanics
alternatively instead of changing the 7805 regulator, using a resistor right after its 5v out, for the entire board, would that work? and what would be the value 10k, 100k? how much logic current a chip should use overall?by NoobMan - Controllers
No, the picture with the hole in the trace is the 3.3v stepper driver board, shown on this page . As off-topic, incidentally i also need some tuning help on the board in picture here I have tried 3 different motors on it, and while i found that getting them to run acceptable isnt really hard, but getting correct math values seems to be. I have some points where my theory results seems to have noby NoobMan - Next Wave Electronics Working Group
I do need some help here about how to tune / set correct values for offtime and decay mode for different motors. I have seen and read quite a few times all the posts of Mr. Nophead, but my monkey brain cant seem to put all individual bricks together to get the construction. What i would like is a noob proof way to determine correct values. Basically getting the correct RC values and then settiby NoobMan - Controllers
Honestly, ensuring very good grounding on any single electronic or electric random piece + their mother in law, is just normal good practice, nothing special about it imo. If i am not mistaking, currently mb also takes some logic supply from steppers via the connections to the gen3 stepper boards, so mb led still lights up and actually doesnt go off when usb is disconnected and steppers stillby NoobMan - Next Wave Electronics Working Group
As i am a toner transfer noob, i want to ask if the board is intended to be suitable for diy purposes. If so, from a more practical point of view, i would like to point out to situations like the red circles in the picture and its fairly usual that the drill holes almost cut the traces they are onto. At which degree that can be regarded as an issue that remains to be decided for each individuaby NoobMan - Next Wave Electronics Working Group
I would love to test something like that, once the soft part would be fixed. Again one of the times when i feel bad about the fact that a monkey new born baby is better coder than me.by NoobMan - Next Wave Electronics Working Group
when some1 occasionally asks me when i need some stuff done and i reply: "yesterday" ... i never would of figured that it will ever happen to be done "the day before yesterday" .... (we are now on 30th) .... hahaha now that was fast !!!by NoobMan - Controllers
Can somebody please make a note on that page saying that to run a stepper one needs to add sda/scl for dir and step? Because this seems to be a somewhat repetitive issue. So we can avoid this in future.by NoobMan - Controllers
About the tutorial, i made that comment more like a "methodics" note. It shouldnt be regarded as difficult, but at same time i wouldnt want to have new ppls think that is a prime way to go, for several reasons, among which: -around open source there are alot of ppls actually trying to make a buck which they hardly deserve (/respect for the hard work of all the devs) and i wouldnt want to undermby NoobMan - Controllers
I got almost the same thing when did my board (which worked initially): basically didnt had a motor connected and turned the 10k pot towards its max setting, and turning a test move that burned the top h-bridge - replaced it after and never tried the max setting of the pot again; in retrospect i think it is pretty easy to burn those chips, the hack doesnt seem to be too efficient either, so i madby NoobMan - Controllers
i use google translate, in most of pages works at some extent for me at least no ideea if it does in this case tho |en| copy-paste the web link into the square field gives smth like thisby NoobMan - Controllers