In a perfect world the first layer height would match what set in the slicer, the squishing comes from trace width being bigger than the nozzle diameter. Z zero is when the hotend just touches the bed. So if your skirt measures 0.15mm in height, the hotend is 0.2mm too close on the bed, probably even closer depending on the hotend design. Normally you should calibrate the Z endstop, when the hoby Ralf - Printing
Have you tried tuning your extruder accleration? I would expect smaller blops from a too low accleration, but it might be worth a try to bump it up anyway.by Ralf - Printing
It's in the Marlin zip file under ArduinoAddons, the directory structure matches that of the Arduino installation. When you have copied the files, you should be able to select your motherboard, guessing rambo.. or?by Ralf - Firmware - mainstream and related support
If your Z height is way too low, you could easily loose 0.3mm on the total height of the print, if the starting layer is 0.35mm, but the bottom of the print would appear very squished. If you print with a skirt you can measure the height of the skirt, this would give an indication of the actual Z height. Do you calibrate Z when everything is warmed up, hotend and bed?by Ralf - Printing
Did you copy the files from the ArduinoAddons directory, and selected the correct motherboard in the Arduino drop down menu?by Ralf - Firmware - mainstream and related support
If you want to move less that ~0.1mm you can use G1 instead of G0 AFAIK on most CNC machines G0 is used for fast moves, to get to a position as fast as possible.by Ralf - Firmware - mainstream and related support
Jeg bor i nærheden af Frederikssund, så det burde da ikke være helt umuligt at finde ud af et meetup.by Ralf - Denmark RepRap User Group
AFAIK nozzle diameter in Slic3r is only used to figure out extrusion widths. So if you set your extrusion widths manually anyway, you should be good, if you just set set your nozzle diameter to 1mm.by Ralf - Slic3r
I can recomend the "Koptan" variant of Kapton, good adhesion when heated, and still a cheap knock off.by Ralf - Printing
Nice.. I have also been trying different methods for doing cold vapor treatment, as boiling Acetone really isn't my favorite.. But havent really had any sucess yet. Wouldn't it be possible to just use a glass jar, and have the paper towel in the top? Acetone vapor seem to seek down anyway, or so it looks when you heat it.by Ralf - General
Have you calibrated the printer? A good place to start is this guide:by Ralf - Reprappers
A thermocouple all the way down into the hotend is the most acurate way to check your temperature, IR thermometers is affected by the thermal emissivity of what you are measuring. I have tried calibrating with both a IR thermometer and a IR camera, ended up being 5-10 degrees off. If the problem is in the Z axis, prints would come out in a different height than expected. My money is also on thaby Ralf - Printing
I would lower the retract distance to somewhere between 1-2mm and bump up retract accleration if it's possible. I have a wades extruder, running 1.5mm retract at 30mm/s with 5000mm/s2 accleration.by Ralf - Printing
Are you printing PLA or ABS? What hotend do you use? Do you have cooling at the upper part of the hotend?by Ralf - Printing
Which material? My guess is ABS.. In case of ABS, I would raise the temperature on the hotend to 245 degrees, turn off any fan's, and lower the bed temperature after first layer, to something around 80-95 degrees, where the print still sticks.by Ralf - Printing
The noise is definitely from the steppers, I have adjusted the current for the Z axis down a bit, and this has reduced the noise, to a level where is it not really annoying anymore.. Auto leveling may be a band-aid, likewise is software backlash compensation, which is often used on older CNC machines. You can get rid of both things, if you just put enough money and effort into solving the rootby Ralf - General
It sure sounds wierd.. Have you tried switching the connections to the X and Y motors? Remember to also switch the endstops.. Edit: What about jerk settings? There is only one parameter for X and Y, so in theroy you should see drift on both axis, but it may be worth a try to lower it a bit.by Ralf - Printing
QuoteJPT - I screwed a single heatsink to both the (heating) drivers, so the heatsinks of them are electrically connected. Could this be the source of the problem? That's a definitely bad, as this will short the output from the transistors, it shouldn't damage them though. It is possible to get insulation washers, to put between the transistors and the hotend, but the easy solution is to just dby Ralf - Sanguino(lolu)
Was going to suggest the local hackerspace, there is a good chance that you will find someone there, who has build a RepRap of some sort, alternatively Labitat in Copenhagen, I haven't been there myself, but I know there are quite some people there into 3d printing. I'm pretty sure that they will be able to point you in the right direction and get you started. It not, send me PM, and we can havby Ralf - Reprappers
Then I think we misunderstood each other, the machine is just a plain Prusa, when I wrote delta in the first post, it was ment as difference. So in the end, it was actually just me being suprised of how much noise a stepper can generate when stepping one step at a time, even when set up to 1/16 stepping. To further enhance the audible expeirience, the printer is build into a MDF box, with the toby Ralf - General
I just put a dial indicator on the printer, to see how much Z is actually moving, and well.. things is working as designed, number of "ticks" matches nicely with distance moved per step. So only cure seems to bump the microstepping all the way to 1/16 on Z, and live with whats left of the noise. I'll just have a ridiculously high resolution on my Z axis.by Ralf - General
The issue is seen both during printing and moves, if I move the Z axis really slow, I get the same effect. I can't find any mention of sample frequency anywhere.by Ralf - General
This is not a real world pratical problem, but more cosmetic/audible. Is it possible to adjust the minimum delta distance that triggers an axis to move in Marlin? After I have got auto bed leveling up and running, it is hard not to notice the noise from the steppers on the Z axis, that seem to move in increments of some 0.1 - 0.02mm, the sound mostly resemble that of a geiger counter, and quicby Ralf - General
Sensing the diameter would be the biggest challenge, the rest is just software.. The capacitive approch seems to be the way to go, as this would give you volumetric measurements.by Ralf - Developers
Found it.. the servo pin definitions only gets defined when motherboard is set to Ramps and some other boards, not for Sanguinololu. Wonder why noone have had this problem before me..by Ralf - Reprappers
Have you checked that the hotend temperature is corect after the firmware update. Could be a wrong thermistor table.by Ralf - Reprappers
Was actually about to create a post on almost the same thing, as I just stumbeled upon it when looking at the code, looking for another problem. Homeing offsets shouldn't be added to G92, my problem is however that with auto bed leveling, homeing offsets doesn't gets added. Anyway I had the same problem as you with negative coordinates and PCB milling, I found that there are 2 workarounds, besiby Ralf - Firmware - mainstream and related support
Already did that, and the ifdef in pins.h only checks for NUM_SERVOS: #ifdef NUM_SERVOS #define SERVO0_PIN 28 ... ... Which means that the following should evaluate true: #if (NUM_SERVOS >= 1) && defined(SERVO0_PIN) && (SERVO0_PIN > -1) servos[0].attach(SERVO0_PIN); #endif But for some reason, it doesn't.. I don't get it..by Ralf - Reprappers
Hmm... Seems like SERVO0_PIN isn't defined when servo_init() is called.. Skipping all the #if's and just calling 'servos[0].attach(27);' does magic, whereas if I do 'servos[0].attach(SERVO0_PIN);' I get badmouthed. Will dig a bit deeper..by Ralf - Reprappers
For now I'm testing with a oscilloscope, just looking for signs of life. It looks like the pin is not initialized, as it goes high if I pull it up with a 10K resistor.by Ralf - Reprappers