Re: RepRap 3DR Delta printer Released

Vibration update:

I checked the stepper driver jumpers of my RUMBA and they are set to (1, 1, 1) so I guess it is the correct position for my Pololus A4988 and 16 microstepping.
I have tried ABS printed linear bearing and they aren't the ones that causes the vibration.
I have played with various Slic3r configs and I think the problem is related with movement speeds:

• at about 20mm/s I get vibration but above 30mm/s everything goes fine
• when moving along a line, it vibrates in the center... I thing it's due accelerations but I don't know to to manage this feature. I see how it start the line at a higher speed but it reduces in the second third of the whole line, finally the speed goes higher at the last third of the line.

So, I'll continue trying different configurations but, I think it would be great to have any of your Slic3r config in order to compare with mines and see how it goes. What speeds and accelerations do you use on your 3DR? I know RIchRap is working on a new post about Slic3r configuration and tunning for our 3DR but surely you guys have one working smoothly so that I can try.

One last thing, checking the steppers and its parts, I have seen that the steps per millimeter are set by RichRap on 55.5 but doing a calculation with the spools (in fact, with the .stl provided by him) it goes to 56.588:

Quote

steps_per_mm = ((360/motor_step_angle) * driver_microstep) / thread_pitch = ((360/1.8) * 16 ) / 56.549 = 56.588