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laserb

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  1. I solved it! I had set the gcode settings to "Marlin" instead of "Ultimaker 2", in cura. Unfortunately, the temp settings in cura can't be made with Ultimaker 2 settings. So now I have to find how to set the start up gcode in Marlin. 🤷‍♂️
  2. As the title says: My ultimaker2 printerhead has started to crash into the frontside. Whenever I start printing everything starts ok. The printerhead moves to the "home position" as it should and stops at the right position. But when the printer head moves to the front, for extruding filament, it doesn't stop it before the end of the rail. Instead it just keeps going and grinds on the belts. After grinding for a second it moves back and starts printing and everything is fine. It stops fine in the other direction. It's only in the back-to-front direction it doesn't stop in the correct posisition. So I have: manually tested the switches and they work. resetted the printer to factory settings. updated the cura to 4.6.1. tightened the bets I have had the printer for many years and never had this problem until a couple of days ago. Any ideas how to fix this?
  3. A bit late, but thanks just the thing I was looking for.
  4. Thanks, exactly what I was looking for!
  5. http://www.thingiverse.com/thing:196038 I've reduced the scale so it's only about 5 cm. And I've stopped the print after about 5 layers. So the complex part hasn't even started. I think it's weird that it only speeds up when the supports are printed. Perhaps there is another setting I accidently changed.
  6. Don't think this is the explanation. The first layer of the supports are printed noticeably slower, it has the same speed as the main print. But when the following layers (for the supports) are printed they are printed much faster and have trouble sticking to the previous layers.
  7. Wow, thanks for the fast reply! It's the print speed. I've changed both travel speed and print speed, but as far as I've see, this had no effect on the print speed of the support.
  8. Is there a way to change the speed when support structures are printed on Cura? I'm using an UM2 and try to print a complicated print that needs support structures. Everything on the prints are ok, except when the support structures are printed. I think the problem is that when the support structures are printed the machine increases the speed. I've managed to reduced the speed on everything else and it all slows down, but every time the support structures are printed it speeds up. The only exception is the bottom layer which seems fine. So is there a way to slow down the speed for the support structures.
  9. I'm always worried something will happen to my printer during long prints, and when I'm printing the printer is most of the time unsupervised. So I've been thinking of building some kind of automated emergency shutdown for UM2, so that it shutdowns if something unexpected happens like e.g. it runs out of filament or filament gets stuck etc. My basic idea is to connect sensors to a Raspery PI/Arduino and if something wrong happens, it shuts down the powersupply. The sensor I've been thinking of is: 1) A wheel to check if the filament is moving forward within some time interval (if filament stuck). 2) Optical sensor for checking if there is filament or if the printer is out of filament midprint. something like this 3) Thermometer to check if something is overheating/burning. 4) Camera. (check in if everything is ok) 5) Current feedback from the motors if the printer gets stuck somewhere. This one is probably a little to difficult for me. 6) If the printer shuts down it will send an automated message to my smartphone. 5) and 6) perhaps to difficult for my current ability and knowledge. Does anyone know if this already has been done or if there are products for this that you can buy? Ideas, comments.
  10. ok, thanks guys for the replies! I was looking more closely on the edges of the bottom layer and it looked "melted" and no layering is visible. So the high temp advice seem to be correct. Therefore my basic strategy is to have high filament temp on the first layer so all the strings are melted together. Which means for the first layer: *) high temp on the nozzle *) high temp on the builplate. *) no fans *) high speed And after the first layer back to normal settings.Does this seem ok? Any advice on settings? (I'm printing i PLA.)
  11. On the factory testprint (that comes with the ultimaker 2) the bottom surface is completely smooth. Does anybody know how they did this?
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