hreedijk

Your welcome Didier..... XT can handle some friction, of course it always depends on the kind and amount of friction. The filament has, from my opinion, better properties than ABS. I'm in the process of rebuilding my UM1 into an alu frame construction. All parts are printed with XT, even the extruder and hot-end mount. Even if it's unsure that XT will hold as a pulley for your lawn mower (I think it can), it's definitely filament you should have for strong, heat resisting parts. I tried a few meters of HIPS (even more heat resistant than XT), but the fumes where killing, even worse than ABS.

Didier, I print a lot with XT and really love it. It's very strong and has no fumes like ABS or Nylon, you can compare the fumes with PLA/PHA, almost nothing. Also, I never had a clog of any kind with it ans also never have any problems with the bowden tube. A little instruction I wrote to swap between XT and PLA/PHA filaments: http://umforum.ultimaker.com/index.php?/topic/3626-colorfabb-3mm-plapha-filament-and-the-um2/&do=findComment&comment=28010

I once had a similar problem, the sound was also that something was scraping against something else. No matter what speed I was printing, the sound was always there. Cause was that there was 1 pulley's lose, although the screw was tighten very well. After dissemble almost the entire X an Y gantry I noticed a small gap in the rod where the screw of the pulley was bored in. During assembly I made sure that the point of the screw of the pulley was not boring itself again into the gap of the rod, I turned the rod 180 degrees around his own axis. I also saw that the Y motor was to close to the wooden case, so the short belt of the Y entry was touching the wood. I placed some washers so the motor went 1 mm more inside, so the short belt has a distance of the wooden frame. I also installed these: http://www.thingiverse.com/thing:56769 It prevents the rods are moving along with the blocks. Hope you can solve the problem.

Hello Chris, Printing with the Ubis hot-end almost 16 hours a day, still very pleased with it. I printed the mount with XT from Colorfabb (much easier then ABS), it can resist 70 degrees and mine is still not deformed.

No prob :-P

Well, as I stated before, I twisted the screw 1/20th of the axis each time, very carefully.........

You are right gr5, no brim (never used it anyway)

Welkom op het forum Arjan, welcome to the forum Arjan !

You are right, looked over it...... I'm also very happy with mine, get very good quality prints !

Funny, no more "end of life" and also $5 more expensive......

I made a quick model like yours and tried to get support added by Cura, It just won't add it no matter wich settings to adjust. Looks like illuminarti is right about the bug. Tried the same model in Cura 13.06.4, support was added to the model. Perhaps it will work for your model also.

That was also my first thought. If it is really necessary to print the object this way, go to expert settings and set the "Distance X/Y (mm)" to a lower value than the overhang of the object is. Be aware that the more closer the support will be printed near the object, the greater the chances are that the support will touch the object.

I've put a hard, self adhesive rubber on the metal trigger of the end stops. You could also move the end stops itself, but that will require 2 extra drilled holes for 2 end stops in the wooden case.

The only thing left is to buy 2 new I'm afraid.......

I'll give it a try.......

I use the "pause at height" plugin in Cura for that, never needed to do it on the fly while printing .........

It seems to. If you set the X stepperdriver back to its original state, is it still skipping? It seems that the motor is not getting enough power from the stepper. I also tuned my stepperdrivers, twisted the screw 1/20th of the axis each time, very carefully.........

Ian, perhaps this could be a solution for you: http://www.ashdistribution.co.uk/product/show/100-5883 Connect the UM USB cable into the female USB adapter, 15mtrs of UTP cable and the other end into your PC.

Thank you Daid, if you cannot get it stable, sure I won't ether!

Will there be a 'unscrap' in the future :mellow:

Your welcome, hopefully you have your UM running very soon!

I've had a similar skipping motor once, also because of a broken stepper driver. Cause was that the stepper driver became to hot, the PCB fan just stopped during a print so there was no cooling anymore. Did you turn the stepper driver the right way as explained in the picture blow:

I tried once on my UM1, put the hex file on the SD card, but nowhere in the menu you can find "update firmware". Also the file is not visible on the UltiController. But for an UM2, I honestly don't know, it would be a very handy feature!

Hello Sebastian, That won't work, the UM2 has a completely different hot-end.