Want to get into that auto-bed-tramming-leveling-tilt-compensation-goodness, but don’t like how complicated some of the probes are? Do like the Printrbot do and learn how to use an industrial inductive sensor for the job!
http://www.youtube.com/watch?v=EcGFLwj0pnA
Note: one reason why Plate glass is better than aluminum sheet is because of surface flatness… glass is about as flat as you can get. if you print thick first layers you wont have issues (and you should with this auto tramming method). but if you were using a very thin first layer you may end up with problems
@Camerin_hahn true, but i’ve found that you can easily deform a 3mm glass sheet by clamping it down in the wrong spots as much as aluminum is warped by itself. Super-thin first layers are tricky either way, so printing them as fat as possible is always a good idea, even with glass or an auto-trammed bed.
I hope that we’ll one day have more advanced surface compensation by additionally varying the extrusion multiplier depending on the local offset.
I love the video though, I may have to pick a probe up and see what’s up.
Kitchen aluminum film between bed and glass worked for me.
tram surface tilt compensation leveling. hah, what a mouthful.
And even better: “AND WAIT, THERE’S MORE!”
I use an auto-leveling probe like the one PrintrBot uses as well. I use a 3mm thick sheet of aluminum as the bed surface and it works great! I will never go back to thumb screws and springs to level the platform…and I think I came up with that idea http://www.thingiverse.com/thing:6558
Thomas - another great video, clicked a link to support.
You are moving the open-source community to a great spot one video at a time.
Education provided:
Firmware
Sensors and
Voltage divider rule. Perfect!
Have you seen Marlin fly off in the wrong direction with Cartesian bed levelling on?
Great vid as always Tom. Any idea if this method works with mirrors?
Mirror did not work for me.
@Thomas_Sanladerer if I am running a 24 volt board what should my resistor difference be?
I tried a mirror with the plated size bottom (otherwise the plated part will soon be damaged by printed part removal). It did not worked for my sensor. But putting a kitchen foil below the mirror did work.
@MrCan_z Inductive probes create a small variable electromagnetic field, I am afraid nothing you can replicate easily with your multimeter (you can buy a probe for less than 3€).
I’m having a little trouble with the Z prove offset from the extruder.
After setting the offset to -0.9 calculated as per the video, the G29 seems not to consider the offset at all.
However if I do a G28 Z directly after the G29, then the offset is set correctly.
I’m using Marlin 1.1 RC2
Any suggestions?