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Re: pictorial print issue identifier - 12 years ago

Hey guys, I love the idea of a PTPG, I would use it all the time! I think sorting (indexing, hashtaging, rating) the mini-articles (green boxes on PTPG) is really important, so that we can apply filtering. Looking for a solution to a printer problem could feel like looking for a new laptop on for example pricespy. I think filtering interfaces with live updating list and count of matches is reall

by tobben - Printing

Re: RepRap Magazine Issue 3? - 12 years ago

I've really enjoyed the two other issues. What's up with issue 3? Can I help?

by tobben - RepRap magazine

Re: Lista över leverantörer av plast för 3D-Printing (Sverige och utomlands) - 12 years ago

Beställde "R1001 PINK 1.75 1Kg" och "LayWood3D printable wood 1.75 " från . Kostade totalt 428 kr Skickades efter 2 arbetsdagar Levransen (Schenker till Umeå) tog 4 dagar God mejlkommunikation Jämn fin diameter Fem av fem smörgåsar till supply3dpla hittills. Har inte skrivit ut något med plasten än, återkommer här om den visar några överraskande egenskaper under utskrift

by tobben - Sweden, Gothenburg RepRap User Group

Re: Extruder Motor Stutter - 12 years ago

I had a stuttering E-motor, sometimes stuttering slowly forwards, sometimes backwards. I had the source code for the Marlin firmware available on my computer, so I opened the file "Configuration_adv.h" and found the line #define AXIS_RELATIVE_MODES {false, false, false, false} I changed that to #define AXIS_RELATIVE_MODES {false, false, false, true} and uploaded the modified firmware to my mi

by tobben - General

Re: Extruder Motor Stutter - 12 years ago

kburr, you saved my day and my parents' Repraps life! Thanks for mentioning relative/absolute coordinates for extruder. After playing around with random settings in pronterface, this output made me suspicious: SENDING:M92 E10 Extruding 1.000000mm of filament. echo: too long extrusion prevented

by tobben - General

Re: weird z-homing problem. Been stuck for days... [SOLVED] - 12 years ago

Guys, I made it. The machine works now. Lession learned: If your pin 20 on your atmel 1284p is not connected to your Melzi PCB, the consequence is that z-home jogs ca 1 cm upwards instead of heading down towards the swich (well, at least if you try to use Marlin). Thanks for rubberducking me, hope this helps someone

by tobben - Reprappers

Re: weird z-homing problem. Been stuck for days... - 12 years ago

I only get the correct jumping between 0 V and 5 V if I measure in the "measurment hole" beside the processor. It turns out that if I measure directly on the pin solder, it gives a constant 5 V. Carefully measuring resistances between holes and pins with power unplugged shows a bad soldering job on pin 20. Oh my, hope I am able to fix it, and hope it's the only one...

by tobben - Reprappers

Re: weird z-homing problem. Been stuck for days... - 12 years ago

Measured pin 20 on the atmega 1284p. It jumps between 0 V and 5 V when endstop swich is pressed, exactly as it is supposed to. pins.h contains #define Z_MIN_PIN 20 just as it should do. Where to look for errors now?

by tobben - Reprappers

weird z-homing problem. Been stuck for days... [SOLVED] - 12 years ago

Hi all! I'm building myself a custom Reprappro Mendel, but are having troubles getting z home to work. When I send G28 Z (home z axis) the z-axis moves ca 1 cm in the wrong direction at the fast home feedrate speed. It behaves as if I sent it G1 Z10, just slower. No bounce back. Tested with different versions of Marlin, same result. Sending M119 gives me "z_min:H" no matter how what I do with

by tobben - Reprappers

Re: How do I calculate the reference voltage for Melzi board stepper drivers? - 13 years ago

When doing an image search for "A4988" i found several chips with markings similar to mine (example), so I guess I should be fine. I'm still interested in details about what this marking tells me though.

by tobben - Controllers

[SOLVED] How do I calculate the reference voltage for Melzi board stepper drivers? - 13 years ago

Hi everyone, I have bought a Melzi board and some 17HS8401 (1.8 A) stepper motors. To make the Melzi deliver 1.8 A current to the motors, I need to set the reference voltage of the stepper drivers like described here (Reprappro Mendel instructions). I have found this source to help me calculate what the reference voltage should be if I have a A4988 stepper driver. I have two resistors marked wit

by tobben - Controllers