Prusa MK2s Completed, problems with Marlin and Z-Height
Posted by Techtinker
|
Prusa MK2s Completed, problems with Marlin and Z-Height June 03, 2018 12:43PM |
Hey All!
Today I finished building my Prusa i3 MK2s , I built it from scratch using my ANET A6 and parts from my local 3d printer part supplier.
Only thing left to do is configure marlin correctly.
I have a weird problem, I tried searching but I keep running in to threads where other people have the same issue but they are using ABL. And all solutions point to fiddling with ABL settings. Although I have probe installed its not connected. I installed a temporary Z-Ax endstop for starters until I can get it to work correctly.
After selecting [Prepare]-->[Auto Home] , All of the axis goes home smoothly and settle. I then use a piece of paper to adjust the height of the bed all round, once I'm happy I print a test cube from the SD card.
The Z-Axis raise, and it starts moving to the area where its going to print and actually starts printing. BUT, it prints in mid air, its about 1mm away from the bed. If I stop the print and auto home it again and check the bed level its still leveled as before. Why is this happening ? I'm so eager to print something but this problem is preventing me to do anything with it.
Some picture of the rig.
Pretty please help me get this damn thing to work!
Not sure how to share the configuration.h file.
Tried attaching my configuration.h, but there's no option, also it complains my message is too long then pasting it.
[EDIT] ---> I managed to upload it to my google drive.
[drive.google.com].
Cheers from South Africa!
Edited 1 time(s). Last edit at 06/03/2018 01:51PM by Techtinker.
Today I finished building my Prusa i3 MK2s , I built it from scratch using my ANET A6 and parts from my local 3d printer part supplier.
Only thing left to do is configure marlin correctly.
I have a weird problem, I tried searching but I keep running in to threads where other people have the same issue but they are using ABL. And all solutions point to fiddling with ABL settings. Although I have probe installed its not connected. I installed a temporary Z-Ax endstop for starters until I can get it to work correctly.
After selecting [Prepare]-->[Auto Home] , All of the axis goes home smoothly and settle. I then use a piece of paper to adjust the height of the bed all round, once I'm happy I print a test cube from the SD card.
The Z-Axis raise, and it starts moving to the area where its going to print and actually starts printing. BUT, it prints in mid air, its about 1mm away from the bed. If I stop the print and auto home it again and check the bed level its still leveled as before. Why is this happening ? I'm so eager to print something but this problem is preventing me to do anything with it.
Some picture of the rig.
Pretty please help me get this damn thing to work!
Not sure how to share the configuration.h file.
Tried attaching my configuration.h, but there's no option, also it complains my message is too long then pasting it.
[EDIT] ---> I managed to upload it to my google drive.
[drive.google.com].
Cheers from South Africa!
Edited 1 time(s). Last edit at 06/03/2018 01:51PM by Techtinker.
|
Re: Prusa MK2s Completed, problems with Marlin and Z-Height June 04, 2018 02:15PM |
Uhmmm! my problem is bigger than this 
Being the noob that I am with this, I realized that not all steppers are the same and needs to be calibrated.
I never touched the following and left it on the defaults.
#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 4000, 500 }
I now measured the travel distance and it was traveling half of what the LCD displayed. And I have a feeling the Z axis is traveling by faaaaaar too much,
No wonder I had to set the Soft end stops to 475mm before it hits the edge, the bed is a standard size 200x200mm bed.
After doing some measurements I got to this.
#define DEFAULT_AXIS_STEPS_PER_UNIT { 150.65, 199.62, 4000, 500 } (the Z-axis is still on its defaults) and I used the following calculation.
This was for Y-axis.
Actual travel distance = 40.07mm ,
LCD Distance = 100mm
Default Marlin distance 80
Formula
( LCD distance / Actual Distance ) * Default Marlin Distance or what ever its currently set as distance
100/40.07 = 2.49
then 2.49 * 80 = 199.62
Now I need to find a way to Physically and accurately measure the Z axis.
Being the noob that I am with this, I realized that not all steppers are the same and needs to be calibrated.
I never touched the following and left it on the defaults.
#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 4000, 500 }
I now measured the travel distance and it was traveling half of what the LCD displayed. And I have a feeling the Z axis is traveling by faaaaaar too much,
No wonder I had to set the Soft end stops to 475mm before it hits the edge, the bed is a standard size 200x200mm bed.
After doing some measurements I got to this.
#define DEFAULT_AXIS_STEPS_PER_UNIT { 150.65, 199.62, 4000, 500 } (the Z-axis is still on its defaults) and I used the following calculation.
This was for Y-axis.
Actual travel distance = 40.07mm ,
LCD Distance = 100mm
Default Marlin distance 80
Formula
( LCD distance / Actual Distance ) * Default Marlin Distance or what ever its currently set as distance
100/40.07 = 2.49
then 2.49 * 80 = 199.62
Now I need to find a way to Physically and accurately measure the Z axis.
Sorry, only registered users may post in this forum.