Here at Type A Machines we refer to it as the “Z home adjustment knob”, which, is a mouthful. Maybe you just skimmed our Quick Start Guide, too excited by your new tool to read thoroughly. It’s okay, we’ve all done it. I know I certainly have. It's that little thumbscrew knob that sits on the inside right corner of the machine. Here’s a picture, so we all know exactly what I am talking about:
Now that you’ve seen it, I want you to know how important and useful this tool is when printing with your Series 1. That knob helps the machine determine “home” along the Z axis. That “home” position is how your printer determines where in space it will begin prints. If the knob is adjusted well, that will be on the bed. If it's adjusted poorly it'll be floating above or mashed into your print bed (neither position is conducive for successful prints). Imagine that adjustment knob as a little tiny Goldilocks. It's position needs to be juuuust riiiiight for your prints to have a nice lay down upon your print bed.
It may seem like a huge turn on the knob does nothing, when actually something is happening, it's just subtle. I'll prove it to you with a little experiment for you to try:
- Start by placing the print head in the middle of your bed.
- Home the Z axis.
- Now turn that black knob in the clockwise direction, give it a full turn, don't be shy.
- Hit the home Z in the printer interface again. Live a little, do that a few times.
What you want to be watching is the nozzle distance over the bed. When the Z is homed, the distance between it and the bed should be growing, even if it’s in tiny increments. Now if you turn that knob counter-clockwise, you should observe the distance between the nozzle and the bed will be decreasing at Z home. That was a fun experiment wasn't it!?
Maybe you need a little more information? You're in luck! I have some for you here: