Topic: How to prevent warping on base layers
Any suggestions on how to prevent working on the base? Do I have to raise the temperatures? It mainly warps off on the right side of the bed.
2 2014-06-13 09:20:36 (edited by tryersol 2014-06-13 09:26:43)
Re: How to prevent warping on base layers
Base warping is usually due to the following:
- Bed adherence - Give the bed a good clean. I squirt some window cleaner on, and leave it for 2 minutes to dissolve the glue stick residue. I'll scrape it off and repeat. Then I'll clean it with acetone, then alcohol, and finally a thin coating of gluestick with the bed set at 40degC
- Wrong temps set for the filament. You can calibrate the correct filament temperature by printing out a hollow rectangle (Attached). Slice the rectangle at 0.2mm layers, 1 perimeter, 0% infill.
Edit the gcode to give you a range of temps in the same print.
For example, if my print has 300 layers, I'll edit the gcode like this:
layers 0-50 - 230degC
51-100 - 225degC
101-150 - 220degC
151-200 - 215degC
201-250 - 210degC
251-300 - 205degC
Temp changes in gcode are done using the "M104 S215" command. In this example, it sets temps of hotend to 215degC.
Let it print, and then mark the temps used along the ractangle. You'll be able to visually see where the layers are getting good deposition and adherence. Dial that temp into slic3r whenever you use that filament. Temps change between filaments.
It's good practice to do this with every new spool, and write the temps on the label, so you can easily switch between them.
- Temperature change within the printer - Try and keep the doors/covers closed. set the bed to 105degC for the first 10 layers, then drop it to 90degC. On certain complicated models, you can reduce this problem further by building a skirt around the model in Slic3r, and set it to 75% of the height of the model, which will help to keep temperatures stable inside.
- Also in Slicer, you can set a brim. I do this for small models, and set it to 6mm.
- Bed height calibration - make sure you have this nicely calibrated. If one corner of the model is stuck nicely, and the opposite corner isnt, this is going to create stress in the print, which will cause the model to lift up one corner.
Let us know how things went, and what worked for you.
Cheers
if it isn't broken, you haven't modded it enough