Calibrating x and y end stops

Hi,

Just finished building the K8200 3D printer. I have run through all the tests with the Repetier host in manual control and everything seems to be functional!

I am now trying to calibrate the end stops. The z-axis end stop calibration went fine. However, I cannot seem to get the switches to engage on the x and y axes with the nozzle in the home position. The screws are just not long enough. Even with the screws stretched to the longest length, the x-axis stops just past the left edge of the bed and the y-axis is at least the couple of inches off, stops almost at the end of travel!

Do the supplied screws work or am I supposed to get longer screws?
I am wondering if I did something wrong.
Thanks in advance for your help.

No, you don’t need longer screws.

Just slide your extruder mount a bit over towards the X motor.

Can you post a picture of your current setup with “homed” x and y ?

Thanks for the quick response! Yes, I guess I can move the extruder over to the right a little (I painstakingly tied all the cables together, oh well :frowning: ). But what about the Y-Axis?

I am surprised no one else has encountered this issue?
Here are some pics:
dropbox.com/sc/8kgtk013v8ou … k-aFExgW7a
dropbox.com/sc/rvp6gm44rl3s … GquHA179ta

from you photos it seems you measured the distance to position the upper frame
(carrying the z axin and extruder) from the front side of the printer.

You sould move it to the back side, ie. take the measurement from there.

If you look at your printer from above, the extruder nozzle sould be placed
in the middle of the base frame.

Then anything shoud go fine. :wink:

[quote=“ichbinsnur”]from you photos it seems you measured the distance to position the upper frame
(carrying the z axin and extruder) from the front side of the printer.

You sould move it to the back side, ie. take the measurement from there.

If you look at your printer from above, the extruder nozzle sould be placed
in the middle of the base frame.

Then anything shoud go fine. ;)[/quote]

Thanks again for the quick response. I see… I need to move the extruder assembly to the back and to the right.
Considering the issues I had with the angle brackets… I would hate to try to move the whole assembly back, the cables will probably not fit now. If the instructions had been a little more explicit I would probably not have faced this issue.

Would it be ok to get longer screws?
Thanks again.

It “might” work with longer screws, but i don’t suggest that.

It will be unstable to calibrate and you might not get the full print range cause your bed hits x and y max, which will be quite BAD.

Thats how it should look like :
drive.google.com/file/d/0B26lSx … h5WUU/view

Maybe you can mount your extruder on the other side of the z axis bar, to avoid loosening and moving the whole construction.
But i personally would prefer to correct the mounting.

[quote=“ichbinsnur”]It “might” work with longer screws, but i don’t suggest that.

It will be unstable to calibrate and you might not get the full print range cause your bed hits x and y max, which will be quite BAD.

Thats how it should look like :
drive.google.com/file/d/0B26lSx … h5WUU/view[/quote]

Ok, I see about the x & y max.
The amount of time I had spent building this… I feel like trashing this whole thing! :frowning:

The instructions though are in some cases very precise are lacking in other areas. This is all it says about positioning the uprights.
“Slide it further down the profile until its centre is at 16 cm (6.3”) from the edge of the base frame."

Anyways, thanks much for your help.

Maybe you can mount your extruder on the other side of the z axis bar, to avoid loosening and moving the whole construction.
But i personally would prefer to correct the mounting.

3d printing is somewhat experimantal technology … :wink:

Yes, I was thinking about it, also flip the spool holder to the other side. But then the home position will be behind and to the right? IDK… probably going to mess up the algorithm.

I think I am willing to give it one more chance… if I can slide the angle brackets. I believe I have some play in the wires which I can work with it.

ok, let me know how it turned out

ichbinsnur, I was able move the uprights and extruder to the correct position :slight_smile: Didn’t turn out to be too bad after all.

Got some first 3D prints! Initially had a problem with the prints dislodging, after putting on some painter’s tape as recommended by some, the prints seem to stick now. Currently, tweaking and adjusting things.
Thanks a lot for your help!

you’re welcome!