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neildarlow / Marlin

Marlin 3D Printer Firmware customised for nophead's Mendel90.
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Restore behaviour concerning endstops #3

Closed Banjer closed 10 years ago

Banjer commented 10 years ago

Some configuration changes to restore some of the behaviour Nopheads original firmware had concerning homing and preventing endstops from getting hit on moves other then homing.

neildarlow commented 10 years ago

We have:

define ENDSTOPS_ONLY_FOR_HOMING // If defined the endstops will only be used for homing

At other times the head will not be moved beyond -100 to +100 for X,Y and 0 to 200 for Z. What is the problem with this?

Banjer commented 10 years ago

I have been a bit busy the last few days, and didn't have time to reply, but the current configuration doesn't seem to offset the hame positions (enough). I'll dive a bit deeper in this weekend and come back with a more extensive reply.

neildarlow commented 10 years ago

OK, taken a look at this.

With my -100, -100 setting and a centred rectangular print we appear to be 1.5mm and 1.0mm out on X and Y. We should probably use -101.5 and -101.0 for X and Y Home respectively.

I would prefer to fix this for both manually set and calculated home positions (I have a feeling that calculated will become the fashion in the future). Z-wise, I am not sure that Z Height - 0.1mm is the right thing to do. Maybe 201.0mm (1mm outside the build area) would be a better value.

It would be great if you can confirm my 1.5mm and 1.0mm offset values are correct.

neildarlow commented 10 years ago

I have re-instated the X and Y Home offsets but presently left Z alone.

Banjer commented 10 years ago

Niel, still haven't got the time to have a closer look, but your solution seems to be better, and everything works nicely now, thanks.