Y Axis not homing  

Re: Y Axis not homing

Hi David

Can you please connect to the printer using Pronterface and try moving the Y-Axis from that. If it moves, then try the "Home" from there and let us know.

Peter

Re: Y Axis not homing

I'm not familiar with Pronterface, but I used Repetier in manual control. When I command the Y axis to Home it just moves about 10 mm. Both the X and Z axis command to Home as ordered. I reposistioned the bed in the Y axis to other posistions, and retried the Home command, it did the same thing. Also, when commanding the Y axiz repeatedly in 50 mm steps, it .would only move one time, and then not respond to any further 50 mm steps.

Thanks,

Dave

Re: Y Axis not homing

Hi.

Just out of curiosity have you ensured that the Y axis will move all the way without power on (thus disabling the stepper motors). It might seem like a silly thing but when I built my i3 I did something daft and couldn't figure it out until someone pointed out the obvious to me (in my case it was power cables plugged in the wrong sockets).

I would ask to initially check that there's nothing physical actually preventing the various axes from running their full length. I've had a USB cable draped over a critical piece and found it prevented the bed from moving. It's possible that something got moved around, such as a cable tie connector, that is now blocking movement.

Also with regard to your earlier problem: If the X axis was homing in the opposite direction it almost sounds like the connector is in the wrong way around on the RAMBo. Manually tweaking a config to make that function correctly could have a knock-on effect for the remaining motors.

Although I'm fairly new at this 3d printing thing I'll help as best as possible. Based on the principle that you don't learn anything unless you fail I must be quite knowledgeable by now 😀

It would help if you could provide photos of your RAMBo as well as the Y axis so that others may offer their help as well.

Re: Y Axis not homing

In regard to the original X axis problem it was corrected by make a change in the configuration.h file and recompiling in the Arduino IDE. here's the code that was changed:
#define INVERT_X_DIR false // for Mendel set to false, for Orca set to true

it was originally set to True.

After that code change is when the Y drive failed to drive back to the limit switch when homing. It works perfectly when printing parts. it's only during auto homing.
I did download pronterface and when I drive the drives with it, the Y drive moves forward away from the limit switch for home position. I like that program, nice for checking out drive function! the X drive, and Z drive move in the correct positions for homing. Also just to clarify, I'm using the LCD display to initiate the Auto Home Function. Also, I have swapped the X and Y drive cable connections on the board, and the problem swapped with the cable swap.
When printing parts, the bed often doesn't drive to the 0,0 position in the center of the bed to locate the build in the center of the bed, but sometimes it does.

Re: Y Axis not homing

I.ve attached two photos, one of the display initialized, the other showing the menu I'm using for the auto home function when the Y drive doesn't move. I addition, do you know what the below function "Set Home Offsets" is suppose to do?

Re: Y Axis not homing

Hi David

This is a forum for the Prusa i3 original; I see you have a clone (as I do). The home offsets, I believe, are simply to make allowance for the fact that the endstops are not at the "Home" position. If your clone is similar to mine, your X-Axis end stop will be at about -50mm from the actual home position.

Peter

EDIT: Incidentally, "Home" should be at frome left of the print bed.

Re: Y Axis not homing

Thanks Peter for your response!

Since there is little documentation that comes with the kit, I assumed that the Home position for each drive was when it contacted each of the limit switches. That would make 0,0,0 at the forward left corner of the print bed. If you use the pronterface program and select the 0 pink circle of the positioning circle, it make the center of the print bed the 0,0 position? just a little confusing to say the least!

Re: Y Axis not homing

Hi Davis

The pink "bullseye" on Pronterface centralises both X and Y axis - sets them to 100, 100.

The Home keys are on the outside of the "target":

HOME X HOME Z

CENTRE X& Y

HOME ALL HOME Y

You should really be looking to GreenTech or you supplier for more information on the settings etc.

Peter