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Roxy,

I'm using Marlin RC7 now, working fine so far. Just hooked up a new capacitive proximity sensor to replace my servo switch. How with RC7 do I get the topographic "map" of the printbed from...

Just came across this on Thingiverse: http://www.thingiverse.com/thing:28135

And just for gits and shiggles, an option to specify how many turns of either the left or right Z rod, or how many turns of the print bed mount screws, and in which direction, to get it level(er). :)

I hope I'll still be able to diff my customisations back in. I hope not too much has changed.

Of course. How else will the printer know where the printhead is in order to move it where you want it, without homing after it's been turned on? Everybody has to do a G28 before a print after...

I uncommented the two EEPROM defines in configuration.h, and removed my +4 from marlin_main. Compiled and uploaded, sent a M502 then a M500, then ran G28 through pronterface, followed by G1 Z0....

It didn't work for me. I think there's a bad calculation somewhere in my firmware that I haven't been able to find.

Seems easy enough to fix, just added a SERIAL_PROTOCOLPGM("Origin: Back Right \n"); etc to the top of each #ifdef ORIGIN_BACK_RIGHT etc.

edit: it works :)

Bed Height Topography:
Origin: Front...

I've just discovered through updating to the latest ErikZalm Marlin (pulling all the goodies from beckdac's Marlin in the process) that if one forgets to put the #define ORIGIN_* code in...

If you're using the Marlin MakerFarm fork from the other topic, those changes are already in your firmware, I think.

No holes, surface-mount MK1. So you have the glass longest dimension sideways, along the X axis? My heatbed connection is at Y max.

Huh. My solder terminals are on the bottom of the heatbed, so I guess it doesn't matter which way I orient the glass. I'll have to get bigger clips to hold a 3mm piece of glass.

What's with the odd dimensions? 214x200. I might need to get the corners cut off at that size.

Nope, using glass from Lowes. Don't know where to pick up any borosilicate.

I don't see how it could be the thermistor. It's on the opposite side of the heatbed from the glass. And the heatbed is suspended above the wood platform by one spacer and three springs.

You mean it's showing how much the glass is flexing from the probe coming down to touch it? Awesome :)

Yes, I do have a slight hump in the middle, but the springs are pushing up on the bed, not pulling the corners down.

Recv: Bed Height Topography:
Recv: --0.05021 --0.00271 +0.00104 --0.05196...

That's how I do it, too. A solid spacer at origin, and springs on the other 3. I also have the Safe Z Homing set to go to X10 Y10 instead of the centre of the bed, to always home on the unchanging...

Roxy, I have to thank you for turning me on to diff viewers. It made it so much easier and quicker to migrate my customisations and settings from my old Marlin over to DACB's new fork. Thanks!

Roxy, what syl20 means is, no matter what value you use for n (2,3,4,etc) the Bed Level Correction Matrix displayed after G29 finishes is always in a 3x3 arrangement. Is there some averaging going...

That is how I do it. I adjust Z down 0.1mm until I hear the switch click, raise it again until it clicks open, then lower it again one step at a time, checking the endstops with M119 each time until...

Well, that helps. With my Z_RAISE_BETWEEN_PROBINGS set at 5, it put the nozzle 1mm too far into the glass, so I changed it to 4, and now it works. It feels, due to the 5mm putting it 1mm too low, to...

No, Safe Homing is still on, though I can change it if need be.

The problem of 4mm being somehow added to the Z axis position after a G28. It has nothing to do with Safe Homing, nor with Pronterface sending bad commands. I can't see anything in the G28 code that...

Well, that problem is understood. The other is still a mystery.