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SoliForum - 3D Printing Community → XYZ Printing DaVinci → G28 only Homes Z axis
Printer:
Cartesian (DaVinci 1.0)
Repetier 1.0.3
Azteeg x3 pro board
G28 only homes the z axis, doesn't even try for x and y. It is set to do x, y, then z per my firmware config. None of the endstops are tripped, and I have verified proper functionality with M119 to ensure they're High and Low as expected. It's almost like both the x and y axis are triggered by default, but they both come back with low on an M119... any thoughts as to what might be the issue here?
G28 alone does not home. You have to supply which axis to home and if a speed to home at is included otherwise the dedault speed will be used. The proper syntax is,
G28 X Y F3000 ; Home XY
G28 Z F1200 ; Home Z
everything after the ; is ignored and only there for user reference. The F specifies a speed to make the move at. You could also include all three on the same line but sometimes you might want one axis to move slower or faster than the other based on the mechanics of your machine. For example on my old machine if Y was homed first the carriage would snag on the bed z screw as the X moved across to home. X had to move first or Y had to move slower so X would have time to clear the z screw.
Tried this, and here is the response from my printer terminal. Still no movement on either x or y axis...
Send: N13 G28 Y F3000*61
Recv: ok 13
Recv: X:0.00 Y:0.00 Z:0.000 E:0.0000
Send: N12 G28 X F3000*61
Recv: ok 12
Recv: X:0.00 Y:0.00 Z:0.000 E:0.0000
Note: I did only send "G28 Y F3000*" and "G28 X F3000*" through the terminal, but the output added a "N12" before and "*61" afterward for whatever reason. Thanks for your help, and any ideas you may have.
Oh, and "G28 Z F1200" did properly home the Z axis, with similar resulting output from the terminal, but without stating all axis are at 0 like it did in my previous comment for X and Y homing tests.
Send: N37 G28 Z F1200*56
Recv: ok 37
Now I see that you swapped to an Azteeg. I assume you kept the original optical endstops. If you did that is where your problem is and you have most likely burned them out. The original design had the pull up and pull down resistors on the mainboard. On mosr after market endstops those pullups and pulldowns are on the endstops. Since the Azteeg is an after market board Panucatt assumed you would be using after market sensors and like most did not put the pullups/pulldowns on his board. As a result you applied 5 volts to the power line of the sensor when it should only be around 2.7 as it would normally be pulled down. So you burned out the IR LED in the sensor and it now sees an active low all the time. If you are using after market sensor then you need to home by hand and see what M119 reports on all three. Home is back right corner of course with the platform raised all the way to the endstop at the back where the filament used to go. On the board those are supposed be plugged into the MIN ports. MAX is not used here.
You nailed it, put in aftermarket endstops and connected to all mins, homing correctly now. Thanks!
yep that will do it
SoliForum - 3D Printing Community → XYZ Printing DaVinci → G28 only Homes Z axis
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