a5:bed-levelling-probe
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
a5:bed-levelling-probe [2019/04/07 03:07] โ More detail on pre-requites and troubleshooting steps. cs2000 | a5:bed-levelling-probe [2019/04/11 23:37] โ [Setup and Testing] cs2000 | ||
---|---|---|---|
Line 14: | Line 14: | ||
=====Initial Considerations===== | =====Initial Considerations===== | ||
- | From my testing and learning as a complete newbie to this whole automatic bed levelling jibberish, three things | + | From my testing and learning as a complete newbie to this whole automatic bed levelling jibberish, three things |
==== Levelling the X Axis ==== | ==== Levelling the X Axis ==== | ||
Line 28: | Line 28: | ||
The reason for this is if the motors turn enough to say, raise the bed 1mm, but for 50% of the movement, they stall because of the friction, your next probe measurement is going to be way off. I had probes that were (apparently) 44mm offset from probe point 1, that's utter madness and was caused by the motors stalling for a portion of their move on every single measurement point. **Lube up your rods people!** | The reason for this is if the motors turn enough to say, raise the bed 1mm, but for 50% of the movement, they stall because of the friction, your next probe measurement is going to be way off. I had probes that were (apparently) 44mm offset from probe point 1, that's utter madness and was caused by the motors stalling for a portion of their move on every single measurement point. **Lube up your rods people!** | ||
+ | |||
+ | See the [[: | ||
Line 72: | Line 74: | ||
Since this is what frightens most people, lets start here.\\ | Since this is what frightens most people, lets start here.\\ | ||
* Grab a fresh copy of Marlin 1.1.8c from Sams repository http:// | * Grab a fresh copy of Marlin 1.1.8c from Sams repository http:// | ||
- | * At the time of writing, you want the file "JG A5 Custom Main Marlin 1.1.8C.zip" | + | * At the time of writing, you want the file "JG A5 Custom Main Marlin 1.1.8C.zip" |
* Extract the ZIP file and open up the Configuration.h file in Notepad or Arduino IDE 1.8.5 and make the following edits; \\ | * Extract the ZIP file and open up the Configuration.h file in Notepad or Arduino IDE 1.8.5 and make the following edits; \\ | ||
Line 230: | Line 232: | ||
- Take the current Z value on the printers LCD screen and negate it. (so a value shown of 1.6 becomes -1.6), this is the offset between your print Nozzle and the sensor height. | - Take the current Z value on the printers LCD screen and negate it. (so a value shown of 1.6 becomes -1.6), this is the offset between your print Nozzle and the sensor height. | ||
* My Screen showed 1.6mm, I perfonally found I needed to add 0.2mm onto this, so my final value became -1.8 | * My Screen showed 1.6mm, I perfonally found I needed to add 0.2mm onto this, so my final value became -1.8 | ||
- | * If you want to lower the head by 0.02mm then you would issue the command "M851 Z-1-8" or to raise it by 0.02mm, its "M851 Z-1.4" | + | * If you want to lower the head by 0.02mm then you would issue the command "M851 Z-1.80" or to raise it by 0.02mm, its "M851 Z-1.4" |
- Next, do a bed level using the LCD and the print bed levelling knobs so that the bed is as level as you can get it using this method, basically proceed to set the correct 0.2mm layer height pretending as if you don't have an IR sensor.\\ | - Next, do a bed level using the LCD and the print bed levelling knobs so that the bed is as level as you can get it using this method, basically proceed to set the correct 0.2mm layer height pretending as if you don't have an IR sensor.\\ | ||
| |
a5/bed-levelling-probe.txt ยท Last modified: 2020/12/25 02:13 by 127.0.0.1