Re: RepRap 3DR Delta printer Released

Having some trouble. This is my first ever build. I'm trying to set up the Marlins firmware to control the Gregg's Wade's extruder Rich has in the original design. The one with the Harringbone gears. I even am using the same exact Wantai 42BYGHW811 nema 17 motors. I do have a a4988 driver though. I tuned all my drivers to 0.45v

2 problems.

I was trying to calibrate the filament travel, My calculations gave me:

#define DEFAULT_AXIS_STEPS_PER_UNIT {55.5, 55.5, 55.5, 613}

In testing 613 gave me 100mm.

Then I have the speed in Repetier Host low I think - Speed (mm/min) 100. And I'm getting some hammering sounds from the motor? Here is a video. There are more at the end.

[www.youtube.com]

What is the proper Marlin setting for this extruder?

The Wantai motor is listed 2.5A. Can I increase the 0.45v on that driver? Will that give it more power?

I really want to get printing. I have been working on this 3 months now and am very close I think.

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Also,

for

#define DEFAULT_AXIS_STEPS_PER_UNIT {55.5, 55.5, 55.5, 613}

How do I calibrate the XYZ numbers? So far I'm just guessing, but I want my prints to be as close to accurate as possible.

Thanks

Alex