My anycubic Kossel printer won’t lower to level or print. It thinks that the bed is at the top and does the same thing no matter what firmware I use. I have no idea what would be causing this or what I can do to fix it....

Hello 3dprintingforum members! Glad to be able to meet you here. I work at a 3d printer's sales and repair company in Calgary, Canada. As you are able to see, my company sells 3d printers and repair someone else's 3d printers as well. My company also prints objects for anyone who uploads a file to print. If someone would like us to design something and then print it, we will get that done as well. We also sell parts and accessories of 3d printers, rent 3d printers, and host a 3d printing club monthly...

Hi everyone, My name is Steve , from Windsor , Ontario Canada , Im new to the whole 3d printing space ... I had my prototype drawn up and 3d printed, i'm looking for info to see how much it would cost to have a small run of say 100-200 parts 3d printed , are there any companies out there that would print large volume parts? . Just trying to get an idea on what the cost per part would be , my part is very tiny and simple . do they charge by weight ? thanks in advance...

I have:
Flashforge inventor
using tianse black PLA left extractor
using inland white PLA right extractor

when I try to level the heads they are not the same the right one is just a tad closer then left. I there an adjustment for each head?
attached are two photos the black is the left ejector and the white is the right ejector. It might be the filament brand causing the problem for the first layer not coming out right. Any thoughts on what I can do to fix my...