hot end won't get closer than 65mm to bed

[DaGroundZero]

I'm having problems getting my printer calibrated. When I run the G1 Z50 F1200 command, the I've been increasing my zmax, but it consistently stops between 65-67 mm away. My zmax is set to something like 600, and it stops in the same place.

Anyone have any suggestions?

thanks,
Shawn

[Polygonhell]

I'm having problems getting my printer calibrated. When I run the G1 Z50 F1200 command, the I've been increasing my zmax, but it consistently stops between 65-67 mm away. My zmax is set to something like 600, and it stops in the same place.

Anyone have any suggestions?

thanks,
Shawn

You probably have a Rambo 1.1, you need to change the steps/mm which firmware are you using?

[mhackney]

We need more details on how you are setting it, what host software and firmware, which RAMBo version, and any other details you can provide. On the surface it seems like you might be setting the values in the Configuration.h file, compiling and uploading but they are overridden by the EEPROM settings.

[DaGroundZero]

this is just the default settings. I've not flashed the rambo yet. I thought it was already flashed when I got it with the kit. I will dl and reflash to see if this fixes anything

[mhackney]

Then how were you setting the ZMax value?

[DaGroundZero]

Just setting it in Repetier host on one of the config screens. I suspect by the question, that that is incorrect.

[mhackney]

Yes, if you are using the printer setup dialog that will not set the z max. Use the EEPROM dialog. It should be obvious what you need to set when you open it. The fields are editable, click on it and enter the x, y, and z max values.

[DaGroundZero]

Thanks all. I was able to get it set and uploaded. I have it moving down now like it should.

[mhackney]

Perhaps if you told how, others might learn something. Just sayin.

[DaGroundZero]

Good call mhackney.

I downloaded the ardunio IDE from http://www.arduino.cc and the firmware from https://github.com/johnoly99/Marlin-for ... kmax-rambo. Both of these are called out on page 81 of the build manual. Just follow the instructions on page 81 to get the complete zip vs. downloading file by file.

I unzipped both files and opened the ardunio IDE.
You need to select the port and board that you will be using. Both of these options are under the tools menu at the top. I chose the Mega 2560 board, and the port for my laptop.
I opened the Marlin project/group thingy. It contains multiple files, one being the configuration.h file. I searched in the configuration.h file for #define Z_HOME_POS. I increased this value by 10 like the build instructions indicated, clicked the save icon (5th icon with arrow pointing down toward a dotted line).
I hooked up my board and made sure Repetier-Host was turned off.
I then verified/compiled the changes by clicking on the first icon (check mark)
Once it was done, I uploaded by clicking on the second icon (Upload - arrow pointing to the right)
Lights flashed on my Rambo board and I received a message that upload was done.
I closed the IDE and open Repetier-Host and tried again.

I hope this helps

Shawn

[mhackney]

Great, thanks!