Kossel XL - Motor & endstop issues

Hi Fellow Nerds,

I've been having issues with my nema 17 steppers in combination with RAMPS 1.4

[www.youtube.com]

It just started out of nowhere, the unwillingness to do a decent G28.

Looks like a faulty connection issue to me?

I prefer geek. It could be a lot of stuff, do your endstops work? What response do you get from m119?

What controller and firmware are you using?

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

Dear fellow geek,

I'm using Ramps + arduino mega with marlin v1.1

My endstops used to work perfectly.

When I use M119 i get:

TRIGGERD when the carriages touch it & OPEN when they don't

Thats odd can you post your configuration.h? It doesn't seem to be responding to the endstops, just crashing the carriages.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

This is the config file i use.

thanks in advance!

A couple of things might help. Change them one at a time, it would be nice to see what it was.

#define HOMING_FEEDRATE_Z (200*60)

Your homing feedrate is very high 12000 mm/min. Not saying you can't home at that speed but that's pretty drastic. Try 2000 (34*60).

Are you running 24v for your stepper motors or 12v, these kinds of speeds at 12v are a bit of push.

Also some people have had more success with the following workaround (it might be a bug):

Where it says:
#define Z_MAX_POS MANUAL_Z_HOME_POS
instead put
#define Z_MAX_POS 298.15

Hope this helps.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

Wow,

it worked!

I never believed it would, but it really did! Thank you so much. I was about to throw my printer out ( after numerous random incidents like this )

No problem. Which of the changes was the one that worked?

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

I changed the code

Where it says:
#define Z_MAX_POS MANUAL_Z_HOME_POS
instead put
#define Z_MAX_POS 298.15

I also adjusted the homing Speed like you suggested.

I have 12v for the steppers.