Hi all,

This probably falls into the stupid question category, but it's driving me insane.
I just finished building my Folger 2020 Kossel, now trying to set it up.

BTW It's a great kit, well made and well documented, I've not really got anything to compare it too,
but in my opinion its a quality piece of kit, and the price is right if you don't mind waiting for it to arrive!

My problem is that I changed out the 4988 drivers for 8825's.
This was to get 1/32 micro-stepping rather than 1/16.
I read somewhere that this was "better", and I figured I'd at least I'd have a pile of spare parts in case I needed them

All works ok, except.... the extruder now stops several inches above the bed!
the only way I've found that will get it down to the bed is to change the Z home distance in Configuration.H
e.g.

//Manual homing switch locations:
// For deltabots this means top and center of the cartesian print volume.
#define MANUAL_X_HOME_POS 0
#define MANUAL_Y_HOME_POS 0
#define MANUAL_Z_HOME_POS 504.5 // For delta: Distance between nozzle and print surface after homing.

Obviously, this fudge gets me nowhere in the long run.

What do I need to change to get Marlin to use the correct number of steps?

Can someone point me at the right setting to change?

Try doubling all the DEFAULT_AXIS_STEPS_PER_UNIT values.

---

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Sorry not to have replied to this sooner.

Many thanks, you were correct about what to change.
It's difficult to see the wood because of all the trees being in the way when you start out with your first printer :-)