Geeetech

Hi All,

I'm having some issues with my Geeetech i3 Pro. Running a G28 works fine, probe detects and z stays at the correct distance from the bed. Then when I run a G29, it probs the front left and front center fine but the front right just continues and crashes into the bed.

I'm running a Marlin 1.1.8 version as couldn't get a Marlin 1.1.9 to work at all. The officia Geeetech also gives the same results.

Any information you can give would be appreciated.

Thanks,

Jamie

Hi Jamie,

Sounds odd that the G29 command fails having correctly probed the first two points,
you'd think it would plough into the bed on the first point or not at all !

What 'Version' of Marlin 1.1.9 did you try to use ?
I used this one with my BL Touch and it worked first time...
https://www.geeetech.com/forum/viewtopi ... 66&t=62412
Link is in the first post in the thread.

Please note that you will have to change the 'Z' axis steps about 1/3rd the way down your config'.h file if you are using M8 x 1.25mm rods as this version assumes the use of T8 leadscrews... (Simple fix - see below)
...
/**
* Default Axis Steps Per Unit (steps/mm)
* Override with M92
* X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
*/
#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,400,93}
...

You'll have to change the '400' value to '2560' if you're using M8 rods.
These have a pitch of 1.25mm - The T8 leadscrews have 4 concurrent threads and one revolution moves 8mm.

That's an easy fix and should work.

Another thing to try... Which probe are you using ? - Does it perform the 'Self test' , 'Deploy probe' and 'Re-set' commands correctly every time you run them ?

I spent hours with my first build playing with the software only to find that my probe was working erratically - My mis-fortune. Many people have a cheap probe working perfectly.

Gerry