The fastest way to level the bed is to...
1. Turn the machine off and make sure the nozzle tip and bed are clear of any blobs of plastic
2. Screw all three bed screws down tight then loosen the front one one turn
3. Manually move the print head nozzle as close to being directly above the front leveling screw as possible
4. Manually move the Z-axis up close to the nozzle by turning the ball screw. Move it back and forth until you get just a little friction with a piece of paper between the nozzle and the bed.
5. Manually move the print head so the nozzle is as close to being directly above one of the rear leveling screws as possible.
6. Adjust that leveling screw so that you get just a little friction with a piece of paper between the nozzle and the bed.
7. Repeat step 6 after moving the print nozzle directly above the other rear leveling screw
8. Check the three positions one more time with a piece of paper and adjust as necessary to get the same friction with the paper in all three locations.
9. If you need reassurance, run the auto-leveling sequence with the Zortrax turned on. You may need to make some slight adjustments since this is done with the bed and extruder warmed up.
Its faster to do the manual leveling then run the Zortrax routine afterwards than trying to home in using just the Zortrax routine.
Also, on my machine the screws turned with the nuts so when I tried to level the bed nothing moved when I turned the leveling nut. To fix this problem I did the following:
1. Removed all of the leveling screws and magnets.
2. I sanded the surface of the magnet that touches the screw head
3. Cleaned all the screws and magnets with acetone.
4. Super glued the head of the screws to the magnets so the screws would no longer turn when the adjustment nut was moved.
This is worth the 10 minutes it takes to do because it saves you a LOT of frustration of trying to level a bed when nothing happens when you turn the adjustment nuts.
I only level my bed about every 3 spools of filament but when I do it only takes a few minutes using this method. I use the Zortrax bed leveling routine to determine when the build plate is pushed up enough in the center to warrant removing it to clean and bend it back.