schafe

My UM2 is one of the very first. I am using 17.10.1. The only issue I have is sometimes at the end of the print it will retract almost all the way back to the extruder motor. No other problems.

Is there a way to make the holes smaller where the extruder makes a turn to head the opposite direction? Something like wall overlap is what I have in mind as in the "infill overlap" setting. Put the bottom layer infill further into the already printed inner wall. Thanks

I'll try it. Thanks

I use Blender to design all of my 3D prints and Cura to slice them. It has never bothered me that the things I design don't come out to the precise measurements I see in Blender. Now I am working on a project where the parts need to fit precisely and I am doing many test prints to get the fit right. Is there something I might be doing incorrectly, or is this a common experience? Thanks

I want to print an RC car body I designed in Blender - see pic. What I want is to print 2 halves of the shell with whatever support Cura calculates is needed. Is there a way to do this?

Sorry . . .

There have been several projects where I have wanted to change Cura settings at a certain level. Like 100% fill for a strong part then change to 20% for more speed when strength doesn't matter. Right now I want to change layer height at certain levels for more detail in one section then change back for more speed. Thanks

Sorry, I've come in late to this topic. Just recently installed your firmware on my UM2 and I like it. My UM2 is one of the very first - approx 7 years old. I had to wait months for it to arrive. I've noticed 2 "quirks:" the screen does shift during a print. Looks like 1 pixel to the right at random intervals. On the print I am doing now, the screen has frozen. Not updating any info and I cannot select or change any settings. The control knob does glow red when I press it, but I still can't make changes. The print continues to go well. The only thing I did was change the print speed and flow rate at the very first, but then put those values back to normal for the "long haul." Don't know if this helps or not.

Yes, that is it. On the youmagine screen it is called "Alternative UM2 feeder - version two." I see now the author is iRoberti.

2 perfect prints now, and at a speed I am pleased with!! Here is a page that describes what to do with the Tinkergnome firmware once you have found it. (There is supposed to be a link here. Every time I paste it, it turns into a screen shot sort of thing. In the Ultimaker forum go to Ultimaker software/firmware and search "Tinker firmware - introduction") For those who have been keeping score, or care, I've added: - New high temp teflon thermal isolator - Printed ABS spacer that replaces the steel spring for the teflon part - Medusa feeder upgrade I am going to add the Alternative UM2 feeder - version two since the new firmware does not run the extruder motor at 2X speed when changing filament.

Interesting news. I started a new print. 25mm/sec, .4mm dia and .2mm height or 2mm3/sec. The planets have aligned, and I obviously prayed to the right gods. I was able to increase the speed to 600% with a feed rate of 190% and a temp of 210C. That's 12mm3/sec! No problems, perfect results, so far. The next thing I print will totally fail and I will have no idea what changed. The UM2 was going so fast that the small table it sits on was moving back and forth.

I recently downgraded myself from a B+ Ulitmaker/Cura student to a C. There is a lot I don't know. Oh well. I've been fighting under extrusion and the extruder motor skipping on my old UM2 for a long time and recently added the Medusa upgrade. I read that I need to change the extrusion multiplier to double the motor speed. 20 teeth on the drive gear and 40 on the driven. On the printer's control screen I set the flow rate to 200% which has worked so far, but loading filament is a pain. I downloaded Marlin v2.0.5.3 and uncompressed it but cannot find anything in the folder that seems like it will install the program on my PC. I have never modified the firmware on my UM2, so I will need baby steps please.

On a side note, I work in the maintenance dept for a major food manufacturer. They trust me with their multi-million dollar cereal packaging equipment, some of which is extremely technical. I am frustrated by the help features offered by the manufacturer. The description of the functions were written by the engineers who designed and programmed the machines - they totally understand how it works. I wish they hired a farmer to write the descriptions - dumb it down a little. I wish the folks who write the Cura help descriptions did the same thing. Maybe add a pic to describe what a feature does.

Thanks for the help. Right now I am printing the 3 parts for the extruder upgrade. I changed the setting "optimize walls," (or something like that,) to on. It eliminated a lingering question I have always had, "why does Cura jump to a circle and print one wall section, then retract and jump to another circle and print one wall section, then jump to the outside wall and print one section, etc, etc." After turning that on, it will print all sections of a wall, then go to another location and print those walls. This saves a lot of retraction/jump moves and seems to make it all run better. I also turned combing to "all" vs "none." With these changes I get awesome results and can print way faster. I still don't understand combing.

After changing the "retraction prime extra amount" to 0, the next print turned out perfect. I did have to set the flow to around 2.5mm3/sec and the temp to 240C, but it worked.