The cooling would be as good (probably even better) if you finish the layer completely for each object before moving to the next one, and there will be less risk of oozing.by nikbjo - Slic3r
I just tried printing 5 objects when calibrating the printer and i noticed that slicer first printed the inner perimeter (a hollow cube with 3 perimeters) for all 5 objects, then the middle for all 5 objects and last the external perimeter for each layer. Is there any valid reason to do it this way instead of finishing the layer for one object at a time? Btw I'm using slicer 0.9.10bby nikbjo - Slic3r
How does the firmware used for delta robots work? Do they calculate accelaration etc. correct? Or do they just calculate the moves/acceleration for an ordinary xy printer and "convert" them to delta geometry?by nikbjo - Delta Machines
Do you have any estimate of how long it would take to print all parts?by nikbjo - Delta Machines
when adding multiple extruders wouldnt the math be much more complex since the arms isnt "rotating" around the center of the head, making the lenght from the "knee" to the hotend different on different places on the plattform.by nikbjo - Delta Machines
Would it be difficault to adapt it to use square aluminium profiles insteadt of the t-slot ones?by nikbjo - Delta Machines
If you look at the description at thingivers it was printed with a feedrate of 120 mm/s and you are using between 15 and 30 so if we assume you have an average speed of 20 mm/s your print would take 6 times as long. The max speed you can run depends on the printer, but you should probably be able to run alot faster than your current settings. You can try with the speeds from the tutorial to startby nikbjo - Slic3r
I already has some nema 14 motors (rated as 1400 g-cm (20 oz-in) when driven with 1000 mA / 2.7V) so they are much cheaper than anything else... Many of the nema 17 i have seen are speced for higher amps but most ppl seems to run them at 1A (with pololu) so the torque would most likely be lower than the specified.by nikbjo - Delta Machines
Has anyone tried building a rostock (or derivate) using nema 14 steppers? I have 3 spare ones from a huxley, and it would be nice it it would be possible to reuse them.by nikbjo - Delta Machines
How big difference is there in torque on a nema 14 compared with a nema 17 stepper if they are driven with the same current (for example 1A)?by nikbjo - Stepper Motors, Servo Motors, DC Motors
It seems like some ppl have had better result vid slower retraction speeds When i have tried OPS the result isnt as good as slic3r and i think its because of the speed since that should be the only difference (have tried "classic" mode with same retraction distance as in slic3r)by nikbjo - Repetier
Is it possible to add a setting for speed used during retraction when using OPS?by nikbjo - Repetier
Try and see where you get better result, i have tried both OPS and slic3r and get better result with slic3r with the same retraction length. Might be because repetier always use maximum speed for retraction.by nikbjo - Repetier
Axis Wrote: ------------------------------------------------------- > @nophead: If I mark it at 120mm, how come I'm > telling it to feed 100mm instead of 120mm? If you feed 120 and it feeds 125 mm the mark will be inside the extruder so it will be difficult to measure.by nikbjo - Printing
Since i have had trouble finding any good source for ptfe tubing in sweden i decided to try ptfe insulation hose for electric cables, it has a little bigger inner diameter (2.16 mm) and thinner walls (0.31 mm) but it works just fine. The one i use can be found here and cost 2.11 euro for 1 meter.by nikbjo - Huxley
the code for calculating motor angles for a certain x,y,z position needs (for each motor): 6 substractions 9 additions 12 multiplications 4 divitions 1 sqrt 1 arctan and 2 if's Do you think that its possible to do without beeing to slow?by nikbjo - Repetier
Can repetier firmware handle a true delta design? Or only the rostock variant.by nikbjo - Repetier
Check the wiring to the endstops so that they isnt to close to the motor wires, the "noise" from the motor wires can give a false signal from the endstop.by nikbjo - Repetier
When printing an extruder gear i noticed that slic3r does a "bad" job of ordering where to extrude, when extruding the inside of the spurs it is done in decreasing y-order (down the y-axis) which makes alot of extra moves compared to if it was extruding the closesed unextruded part.by nikbjo - Slic3r
Sublime Wrote: ------------------------------------------------------- > nikbjo Wrote: > -------------------------------------------------- > ----- > > It's a loot easier to do in the slicer than in > > firmware since you have to analyse the > extrution > > and its even if it could possible be done with > > look ahead functions in firmware you have alot > ofby nikbjo - Slic3r
You migth be missing steps on the "horisontal" move, since the error seems to accure after the sideway move.by nikbjo - Huxley
It's a loot easier to do in the slicer than in firmware since you have to analyse the extrution and its even if it could possible be done with look ahead functions in firmware you have alot of more time for computations during slicing. After looking a little on skeinforge the Oozebane script seems have that finction.by nikbjo - Slic3r
Do you have anymore information about the printhead? Quote2. very cheap, ultra short nozzle. the brass heated part is only 20mm long before ceramics insulator takes over and theoretically gradient from 240 to 80 degrees centigrade spans over just 15mm (still need to take some exact measurements, maybe put additional measuring point permanently, doing "extruder chassis overheat" by the way). theby nikbjo - General New Machines Topics
it worked when changing move after x% retraction > 0.by nikbjo - Repetier
Sound Wrote: ------------------------------------------------------- . Unfortunately, neither Sprinter nor Marlin > implement G0 correctly so you'll get a very slow > and ineffective retraction because it will be > syncronized with the travel. > That wouldnt be a problem if slic3r make the movement into 3 separate moves, where the lenght of first/last part is based uppon the amount toby nikbjo - Slic3r
Would it be possible to make slic3r compensate for the "springiness" in bowden extruders so that it extrudes a little extra material at the beginning of a move (since some of the extrution will build upp pressure in the bowden tube) and a little less during the last part (where the pressure in the bowden tube "help" with the extrution) so that the preassure in the bowden tube is close to zero atby nikbjo - Slic3r
Would it be possible to divide a move into 3 steps (when using retraction). When moving to next position start the move and retract at the same time, than move most of the way as usual and than start feeding the filament back during the last part of the move. Eg. if moving from 0,0 to 0,100 move from 0,0 to 0,3 while retracting, move from 0,3 to 0,97 as usually and finnaly move from 0,97 to 0,100by nikbjo - Slic3r
I have trouble getting OPS to work I have compiled firmware with #define USE_OPS 1 and has eeprom settings as: OPS operation mode: 2 OPS move after x% retract [%]: 0 OPS min. distance for fil. retraction : 0.80 OPS retraction length : 5.00 OPS retraction backlash : 0.00 But it does never retract anything during moves. Any suggestions?by nikbjo - Repetier
Hi, i have trouble with one of my pololu A4988 stepper drivers (on a sanguinololu board). I get a loud "clicking" ( ) noise from one of the steppers, and it seems to be coming from one particular pololu, i have tried switching steppers and switching places of two different pololu's and it always stays with the same driver. Anyone has any idea how to fix it?by nikbjo - Controllers