have a read [3roomlabs.blogspot.sg] cheers side note : maybe its time some1 came up with a stepstick that has 2 PCB, so that larger caps can be mounted to mitigate noise and enhance drive torque (larger current pooling?). does any1 think this is worth the time to explore/mod/DIY?by redreprap - RAMPS Electronics
hmmm may i suggest you search around your locallity for an item like this. its a normal pulse wave modulated power supply unit. it may come in varying ampere capacity flavors. it is a good idea to have something with higher amperage (approx 10A?)by redreprap - Reprappers
hello folks, i tested a new stepper ordered from a website (wwwonlinesteppers.com , its china i think). i was a sucker at their pricing (and i need some low budget steppers :p ) so just to share some info ... so this little NEMA23 costs about USD21, 400steps/rev. rated @ 0.9Nm torque (not huge), 12v @ 0.38A on paper, operated @ 0.5A 22v (Vmot). using an old cheapo (china) A4983. the 1/16 stepby redreprap - Stepper Motors, Servo Motors, DC Motors
hi, i use sanyos ( or rather, still testing) mine are 9v, .85A i use 4983, they seem to skip less steps than 4988 (still not sure why) did you calibrate the drive current? when mine is almost calibrated, i measured a casing temp of about 45-50degrees. just fyiby redreprap - Stepper Motors, Servo Motors, DC Motors
currently i am testing what a manufacturer claims to be a NEMA 23 400step/rev 120 oz-in stepper. it is worse than my NEMA 17 42 oz-in sanyo. i have tried voltages ranging from 10- 26v and all current ranges up to 1.2A (the stepper is rated @ 0.4A 12V) ... im wondering if i missed anything. or its just my luck my first try at other motors and its a lousy motor factory? my thinking about 400step/rby redreprap - Stepper Motors, Servo Motors, DC Motors
this is what i tried currently [3roomlabs.blogspot.sg]by redreprap - Stepper Motors, Servo Motors, DC Motors
i got mine from ebay, but i got them from a US surplus. a whole lot of 20 pc LOL! then i ordered some more from odds and ends to try diff kinds of steppers, and like you say, yea ... they like to ship them on boats powered by snails. anyway, i have spare motors, they are sanyo. i have about 10 spares atm. if any1 needs some.by redreprap - Stepper Motors, Servo Motors, DC Motors
i think when this is ready, i am going to kill myself calibrating it ... LOL [3roomlabs.blogspot.sg]by redreprap - Reprappers
yea i was really impressed with ultimaker. but have you seen those UV cured photo-layer printers? i blame ultimaker for getting me into this very nice mess of a hobby LOL !!!by redreprap - Reprappers
i think, when the belts get tensioned up, and if the bearings that acts as idlers are not perpendicular for some reason even if very slight, as the belt rolls, it will start to drift. even gravity pulls them, dont forget that. and the belt needs to be really setup straight so if you give it a free roll by hand, the belt should move in a straight line and not be ajar slightly in any direction, i aby redreprap - Reprappers
im going to try and use 400step/rev steppers on a direct Z-drive. but using 4 steppers. 1 each cornerby redreprap - Stepper Motors, Servo Motors, DC Motors
any1 tried incorporating an encoder into any ramps? etc?by redreprap - Stepper Motors, Servo Motors, DC Motors
u need bearings with flanges ... im guessingby redreprap - Reprappers
well then you guys have to consider that your steppers are truly stepping really evenly at1/16 ... as i have found (nophead has alot of experience on this) ... i have done trials with 2 drivers (a4988/4983) .... seems that if the drive current setting (including the R sense) is not build to fit the stepper, the motor will not step 1/16 in equal steps.by redreprap - Stepper Motors, Servo Motors, DC Motors
ooo yes ... rotate the model onto its side ... konwiddak Wrote: ------------------------------------------------------- > You could put the model on its side, then use > support, but limit the support to only the first > 10mm (there is an option somewhere in kisslicer to > do this as a one off in one of the drop down menus > at the top of the window)by redreprap - Reprappers
nice ... i wish i could finish my printer soon lolby redreprap - Reprappers
few weeks been away ... n wow nice ... n wow drv8825 !!!by redreprap - Reprappers
oh my ... i guess this is one of those that we are all afraid of ... suppliers that do not supply what it is suppose to be ...by redreprap - Reprappers
LOL windows 8? ... isit good? ... been using windows for a long time ... and my fav was windows2000by redreprap - RAMPS Electronics
hmmm stepper motor energizing voltages are not exactly DC ... they are kinda mini DC pulses ...by redreprap - RAMPS Electronics
errm i paid some attention to the torque they give.by redreprap - Reprappers
hmmm roller painting .... paint feed mechanism will be interesting ...by redreprap - Reprappers
wow thats cool. FYI i bought a 2000g china made scale for abt USD8. but im no where near to executing mods. Simba Wrote: ------------------------------------------------------- > RESULTS: > > I was able to build a load-cell arduino > combination that works. Specifically, a loadcell > from a 5000g kitchen scale with 1g accuracy, you > could in theory weigh about 0.3g. Howeveby redreprap - Developers
try B & B manufacturing. i got mine in 30 days where others took nearly 3 months but the ones i got are XL belts. the guy who helped me thru email was quite fast on replies so you might wanna try it.by redreprap - Stepper Motors, Servo Motors, DC Motors
oo ... black edition ... the 1 with dual VR? yes? well my cheapo china A4988s dont work well with my motors. it happens that A4983 with 0.2ohm sense are so much more reliable in terms of very nice 1/16steps achieved. in terms of heat sinking, i have managed to improve heat transfer by super-gluing the heatsinks instead of the stock tape etc. anyway. i have destroyed 4 A4988 from RRD, and i dontby redreprap - Stepper Motors, Servo Motors, DC Motors
this is what that works for me .... strangely, any way that i try to communicate with ardy+ramps on first try, will fail. after removing the USB from the ardy, replug it in (xp signals it recognizes it) ... rinse repeat that 2 more times ... and i get to upload stuff. strange but works for me.by redreprap - RAMPS Electronics
hmmm intrigues me still ... i cant get my brains to think abt what could be a solver lolby redreprap - RAMPS Electronics
hmmm yea, that would be the nominal start up method. for me, i use my fingers to apply some force on the pulley, then adjust VR (without any mechanics loaded on the motors), so from there i will find out at which point is the least torque and the most torque, where torque starts to build up, then i try and find a point that is a "firm" torque. un-orthodox method, cos you need to know how much "by redreprap - RAMPS Electronics
k im just intrigue by this part ... how does 1 use this? if i guess ... there is 1 pin thats a trigger ... G29-G32: Bed probing G29 Detailed Z-Probe probes the bed at 3 points. G30 Single Z Probe probes bed at current XY location. G31 Report Current Probe status reports whether Z probe is triggered. G32 Probe Z and calibrate with FPU probes the bed at 3 points and updates transformation matrixby redreprap - RAMPS Electronics
did u "tune" the stepsticks? current drive pot/VR?by redreprap - RAMPS Electronics