i have been reading up those @ CNCzone forums. they are not cheap, unless you DIY. i hear they go for USD3k? they call it ATC (automatic tool changer). i have been hunting around too, i think CNCzone forums have more answers.by redreprap - CNC Routers, Mills, and Hybrid RepRapping
yes some tomatoes were "killed" in the process without proper mills, flat bed cutting tools, etc ... making this is quite a challenge the rail length is 750mm, total movement accessible is approx 660mm. calculated per step movement is roughly 5microns ++. but with wood flexing and play, i wouldnt know until i get my hands on a dial (which is coming in next month i think, even so i think wood fby redreprap - Developers
yea with that kind of equipment, you definately wanna put on some HIWIN rails ! give everything zero friction where possible, slick "pornographic" equipment !!! i have no idea how these 325V things work, i read some CNCzone stuff, but still ... i just dont think i can buy more stuff to play with LOL .... or else i have to give up my bed space ! VDX Wrote: --------------------------------------by redreprap - Developers
hey isnt this getafix !!! from asterix and obelix? hahaha !!! i love their cartoons ! VDX Wrote: ------------------------------------------------------- > ... made a test for timing/homogenity with the > 'only_red'-modified Casio-beamer and a 10cm tall > A&O-figure. > > - setup: > > > ilename=Miraculix-setup.jpg > > > > - result - the figure is 100mmby redreprap - 3D Scanners, Book Scanners, and Optics
ic, i have been keeping a lookout for cheap scanners. did you see the 1 on kickstarter? i think it was going for US$700 odd. not sure about the accuracy tho. it will be fun to scan thing into blender and muck around ... then print em :pby redreprap - Developers
oh my, dental mills. so now instead of FFF, a precise machine could just mill a block of wood straight! that will be really cool aha the Z thread. i have a sample of 2 steppers coming in, the factory installed the threads as part of the shaft, the are 150mm run length. i was recently drawn into smaller and smaller actuation lengths because i got hooked into PCB milling (even before i finished mby redreprap - Developers
i see, its much like those commercial super mills. XYZ arm plus rotary axes on the tooling platform or something. like this? lol ... ima buy 1000 if its 400E !!! ... but then again ... the fun is in the making of it, it is going to be totally pornographic to make such an armed printer !!! btw how did you achieve 12micron with 1/2 stepping? really small pulleys? or gears or gear reduction?by redreprap - Developers
haha i though 325v was volts. then i had a peek in ebay. so its a endless loop feedback. it must be really precise !!! im not sure what simultane is, google doesnt show me anything, wad is simultane? but these things look so ex, how isit able to reach below 400e ?by redreprap - Developers
hmmm a CNC beast VDX ?by redreprap - Developers
microstepping is not overkill my friend, it is 3d printing porn ! lol (my gut feel) when done right, we all do not need to "smoke" our ABS models in acetone to get shiny finish :p (but then again, having a fine finish AND smoking acetone ... even better ! haha) finer and finer accuracies i believe is what will make it better ... or at least i assume. while bigger NEMA23 can get you brute force,by redreprap - Developers
side tracked ... the bloody RIGOL DS2072 scope is asking me to buy it ... damn electronics toys ... WHY DO THEY BULLY ME !by redreprap - Developers
aha, i think mechanically, every stepper is made in a std way with std grooves (i assume from pictures i have seen). how identical are those grooves i guess would be the answer to how "linear" is the result of each step (i assume again) as it move and stop and move and stop. say for a certain motor to achieve perfect movement, it has to have 1A and 10volts drive. for a stepper driver to "know" iby redreprap - Developers
like you said, the motor has its own inertia to overcome, and like nophead has explained in his own findings, each model of motor needs a specific drive to get it to work optimally. otherwise, you get miss steps or steps skipping. (you prolly need to see my blog #006th post) nophead suggested to use a laser device to ascertain the real accuracy of the perstep movement, unfortunately, that deviceby redreprap - Developers
are you already trying out the driver? 128th step is quite a feat. cos even now it seems at 1/16th step, not all steppers are getting it right. ill be happy to try some 1/128s :p. speaking of which, @ 128x ... the Gcode load will be 8x more yes? in that case, the STL file will be like really huge eh?by redreprap - Developers
so what happen to OILON? TBH, like simba said, once it wears out a little, the play comes in and ... i wonder for light duty apps, will teflon do its lifespan any good?by redreprap - Developers
i guess if things get any more complicated ... most likely whoever that is going to implement it will be closed sourcing it ...by redreprap - Developers
if you have a voltmeter of some kind, you should probe the resistance of the heater bed and work out that power consumption and see if it is the bottleneck. if the power numbers are approx correct then, you should lower the resistance of the heater to get more power in and so raise the bed temp.by redreprap - Controllers
i believe i searched for something, but the search text does not appear in the search input area in firefox. maybe you can have a lookby redreprap - Developers
yea, now i wish i am making a rostock hahahaby redreprap - Reprappers
ahhhhh thats the relation i was trying to link tyvm.by redreprap - RAMPS Electronics
mmm i did measure the step once on a scope, i cant rem exactly but i recall it has a weird duty cycle of over 90% ...by redreprap - RAMPS Electronics
yeowch ! its a good idea to home to the top. yea i rem that page nophead did, fantastic, with the wipe action before print action ! ima start looking at firmware mods ... just curious, can 2 Z limit height be set in the firmware? is there such an allowance?by redreprap - Reprappers
yea its ok, imagine a DC motor, reverse the cables to reverse the rotation. its the same, just dont mess up the order. and power down to do it, doing it with power on = fried electronics.by redreprap - Controllers
in my bid to mod the stepstick, i think the place where i could find these SMD trimmers are element14 (in my local)by redreprap - Controllers
plug your steppers into the ramps (that 4pin thingy) the reverse way (1234 --> 4321), it will move in reverse and it should make the endstops "see" it in the correct direction. is your extruder stepper the same size? the drive frequency of steppers may hit audible range, it is quite normal, there are ways to make the frequency higher (inaudible to us, but your dogs may go crazy)by redreprap - Controllers
fwoooo this is very interesting for me ... wad a nice machine !!! and the belt doubler idea is very nice was he trying to play a song from the motor noise? with that, it also almost effectively doubles the amount of torque of a smaller motor !!! vive la NEMA 17 !!!by redreprap - Controllers
the R of the heater bed is low, u measured that? over current situations, some PWM shutsdown. there has to be some extra resistance in the PCB to justify it working though. cheapest PSU? any china computer PSU 300w, new or old.by redreprap - Controllers
i guess 0.7v will work too (1.7A drive, about 2/3 the torque i think). but it is always good to find out what the Rsense are. if you have a chance to spot a certain digital multimeter Uni-T UT61E, it measures down to 0.01ohm, and you need to have 1, go grab that. it should not be more than US$80 in stores. Ohmarinus Wrote: ------------------------------------------------------- > Hey, thankby redreprap - Controllers