tomnagel

EMI problems from a fan and some leds is extremely unlikely. EMI problems arise when signals have a high di/dt (change of current over time) and/or high dV/dt (change of voltage over time). Any capacitive or inductive coupling to other wires may give problems on the electronics that is attached.

I created an object to hold 3 small jars with spices for use in a kitchen cabinet. I noticed that the flat sidewall is not very smooth for the first 20mm height, which corresponds to the height where the 3 circles stop. Above 20mm (where only the wall is printed), the wall is silky smooth. What the picture also shows, is that the not-smoothness is on one side (right side in the picture), and not on the other (left side). Does anyone have a clue about the cause of this non-smoothness?

I am experimenting with all the settings in Cura. I often print the same object to see what changes. Tonight I sliced the same object I was already printing, but with different settings. Therewith overwriting the file that is actually being printed! Does the "printing" function (which is a separate window) first buffer the entire file in memory before it starts printing?

The printing window in Cura has 4 tabs. The 'Term' tab apparently shows communication with the Ultimaker. Mine shows: echo: External ResetMarlin 1.0.0 RC2echo: Last Updated: Marlin-Mon, 11 Jun 2012 17:33:42 +0200 - b67dacdc8f1bd489e058e16d92ba29c364b2a8e5 | Author: Build-Me-Marlinecho: Free Memory: 4494 PlannerBufferBytes: 1232echo:Using Default settings:echo:Steps per unit:echo: M92 X78.74 Y78.74 Z533.33 E865.89echo:Maximum feedrates (mm/s):echo: M203 X250.00 Y250.00 Z5.00 E45.00echo:Maximum Acceleration (mm/s2):echo: M201 X9000 Y9000 Z100 E10000echo:Acceleration: S=acceleration, T=retract accelerationecho: M204 S3000.00 T3000.00echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum xY jerk (mm/s), Z=maximum Z jerk (mm/s)echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00echo:PID settings:echo: M301 P22.20 I1.08 D114.00echo:SD init fail!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!Error:checksum mismatch, Last Line:16Resend:17Error:Line Number is not Last Line Number+1, Last Line:16Resend:17Error:Line Number is not Last Line Number+1, Last Line:16Resend:17Error:No Line Number with checksum, Last Line:16Error:Line Number is not Last Line Number+1, Last Line:16Resend:17Error:Line Number is not Last Line Number+1, Last Line:17Resend:18Error:Line Number is not Last Line Number+1, Last Line:17Resend:18Error:Line Number is not Last Line Number+1, Last Line:18Resend:19Error:No Line Number with checksum, Last Line:18!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!!!Comm timeout, forcing next line!!Error:checksum mismatch, Last Line:51Resend:52Error:No Line Number with checksum, Last Line:51 Should I be worried about these errors?

The best option I have found for the feeder is called the "Bertho's feeder upgrade". You can print some of the parts you need, other have to be found in a hardware store. This upgrade, and others, are mention on http://forum.ultimaker.com/viewtopic.php?f=6&t=1368#p8325 Bertho's feeder upgrade changes the delrin pressure plate of the UM feeder with a ball bearing, and it gives pressure via a spring. I'm building it right now, because I think that is a major improvement.

I downloaded a bracelet from Thingiverse, sliced it with Cura and printed it. Strange things happen in the print, the head prints in parts where it should not. I Cura, the bracelet looks good. I inspected the code with Repetier host, and indeed, the things which print wrong are apparently in the gcode. Repetier Host shows exactly what the UM is printing. See pictures. How can I avoid this?

My Ultimaker is less than 3 weeks old, so I have little experience yet. I did make some ok prints, but the last three object all show a strange phenomenon: the first few layers show an increasing offset in Y direction, so when I look at the object from the side of the Ultimaker, the side of the object should be perpendicular to the print bed, but it looks like a stairs. To be very specific: layer 2, 3 and 4 each shift around 0.2mm (one wire thickness) w.r.t. the layer below. After that, layer 5 and further are perfectly on top of each other. The first time this happened I had increased printing speed to 75mm/s, and I assumed the Y-stepper had lost some steps in the first part of the print. But it is reproducable, also with speed back to 50 mm/s. I have been editing the start-Gcode to lift the printbed a bit after homing the Z-axis (which by the way didn't work). I don't see any relation to my problem, but maybe there is. Any help is appreciated.

Thank you Daid. I moved my Ultimaker from the living room where I built and tested it (with a netbook running WinXP) to my computer room, and was not able to connect normally. I changed the setting like you wrote and presto, it connects. (Win7 Home Premium, SP1, Cura 12.08, firmware UM upgraded via Cura)