Solved Z Axis Goes Up, But Not Down

Hi all,

I just replaced my Adruino board and the Z Axis will go up, but not down. I triple checked the Z-stop switches/cables/connectors. With the Z-Stop switched open (not pressed down) the Z-axis will lower, which seems opposite of normal to me.

Has anyone seen this before?

Thanks....Ryan

 

hi Mark....thanks for the quick response.

I bet you're right. I didn't update the firmware, it has whatever was pre-loaded on there which is showing as "Mendel" in Matter Control. I have the R1 with smooth Y-axis rods.

 

Thanks! That did the trick.

 

Hi there, I recently encountered a similar issue, but have updated the firmware from matter control several times to no avail.

Here's what happened - my filament became caught on something during a print, and began pulling the printer head upward. It took me a minute, but I figured out what was happening and fixed the problem. Once I gave the filament some slack, the assembly crashed down onto the plate.

Once I tried to zero it out and print again, the printer began acting strangely. When I use the Z+/- controls individually, the head moves up and down accordingly. But if I try hitting the "move all" button to zero it out, or if I try to start a new print, every time the printer head is supposed to move down, it moves up instead.

I'm thinking that maybe a wire somewhere was knocked loose, but I'm not sure where to look exactly. If there's another place to find firmware updates, that might help, too.

Anything you guys could suggest for me to check?

Thanks!

 

Nevemind, I ended up finding a video on how to align the Z axis limit switches that showed me they had been knocked out of line. (http://guide.robo3d.com/Guide/Homing+Your+Extruder/7) Problem solved!

 

I just bought the R1+ and have printed a few things. I tried the comb and had an adhesion problem and needed to stop the print. After that when the head tries to go down it goes up. Trying to home the Z axis also makes it go up. The Z switches look good. How do you release the arms so you can lift them up. in the video they lift up so easy. Mine are stuck fast.

 

@Mitchell Treece Do you have a multimeter that you can use to test for continuity? Put the meter on the z axis limit switch connectors. It shouldn't show anything until the carriage is lifted. I'll post a video to show what I mean.

You should test both sides.

 

Thanks I will try this tonight.

 

Ok I do not see any moment in the needle on my meter. I also seems like i can barely move the arm as there is a bracket the seems to keep the arm down on the sensor.

 

You will need to check to make sure there is room between the carriage and the vertical stop (GREEN area). Check both side to make sure that the space is close to the same.

Sounds like one of your z axis leadscrews is too high and causing the binding.

 

the arm on the right side was sitting too high it seemed. I was able to raise the sensor up two rotations and now it prints fine again. It starting to squeak some tho.

Thank you so very much for your help!