Hello, everyone! I've been following this community for a while but haven't posted yet.

Hello, everyone! I’ve been following this community for a while but haven’t posted yet. I’ve learned a lot from reading posts here, you guys are great!

I’m building a Delta style printer now - this is an on-again-off-again relationship with building, getting frustrated, can’t find information, burning myself, putting it in the corner, and pulling it back out again to go through the process again.

So, I’ve just pulled the machine back out and I started hooking things back up, and hopefully with your advice, get it up and running perfectly.

Right now, the frame is built, the end stops seem to be working, Marlin Firmware is playing nicely with my motors, and now I’m interested in automatic bed leveling.

What are the opinions from you seasoned pros? Servo? Long allen wrench? Momentary switch?

I have read that a servo probe sled, while some people have gotten it to work, is a long run for a short slide. Most people use the allen wrench method, with the hacked safety pin and the endstop on the effector. I have seen the larger momentary switches on other Delta printers, and some just do it all manually and feel that they get the best results.

When it comes to calibrating a Delta printer, what is your preference, and why?

I would use one of these. They’re easy to setup and work great if you have a metal bed. If you have a glass bed, add aluminum tape at the bottom.
https://www.ebay.com/ulk/itm/221808065064

I’ve never heard of the hacked allen wrench method. I’ve always placed my hot end on a pivoting mount and put a switch on the top end so that when the nozzle touches the bed, it pivots up and clicks the switch. This has always worked for me, and you don’t need any X/Y offset for the switch, just Z.

Picture of said design of pivot mount - it worked the first time so I didn’t really iterate on it much to make it look better: http://i.imgur.com/v6sK2A8.png

@ThantiK I may be describing it incorrectly - this is the kind of z probing setup I have but don’t much care for - https://youtu.be/nqxWmxrUIuI