Slowly making progress, finally finished all the mains wiring with SSR.

Slowly making progress, finally finished all the mains wiring with SSR. Not a huge fan of Dupont connectors either. I had a bent 10 mm rods from Aliexpress, contacted the seller and the replacement was also bent. Paid a bit in shipping for a Misumi one, but the quality is definitely better.

I have a couple questions though.

  1. What is the required wiring between the Pi and the Azteeg x5 Mini? I have a bazillion wires floating around now and don’t want to much it up.

  2. How does everyone power their Pi? I have seen previous posts about a step down convertor, but can it be run directly off the Azteeg?

  3. What should the z micro stepping be set to? I put it on 1/32 like X, Y, Z, and E. I have 4mm pitch ballscrew from Golmart. I have seen other posts about reducing this, is this necessary or will I run into issues with these settings?

So I purchased the only micro switches I found on RobotDigg: http://www.robotdigg.com/product/154/Microswitch+Board+w/+Lead+Wires+for+3D+Printers
These definitely won’t work with the Eustathios Spider 2 printed parts. Does anyone have a suggested site for ordering the correct switches? Would the following work?

https://amzn.com/B00G2E6UZC

For the pi, just mount a 2a usb wall adapter to the underside. That’s the easiest way. Otherwise you can use one of these connected to your printer PSU: https://www.amazon.com/dp/B016XI99X6/ref=cm_sw_r_cp_apa_H26WxbSZ4ZTGM

For the z the 1/32 microstepping is overkill. Calculate the step/mm and you will see it gets a bit excessive. I like 1/8 or 1/16 on Z. We already get mechanical reduction going from a 20 tooth motor pulley to a 32 tooth pulley on the ball screw.

To connect the printer controller to the pi all you need is the usb from the pi to the controller usb input. You could wire it instead over the tx/Rx lines and skip the usb… But the Usb is really the most stable way in my experience.

For the end stops something like this:

http://www.robotdigg.com/product/141/Endstop+Subminiature+Switch+SS-5GL

Most any sort (single pole double throw) microswitch should work.

Here are some more:

additionally, I had to drill out the mounting holes of the end stops to 3mm

The really small micro switches have holes for 2.5mm hardware. One size up and it probably work with 3mm screws. Whatever standard that has the main switch body about 28mmx20mm I think.

Yes as others have mentioned you need to open up the holes on the switch to 3mm. There should be enough meat in the switch housing to do this (there has been on every switch I have bought before). I just do it this way to avoid having to keep yet another size of bolt on hand since I have so many 3mm around already.

Thanks for all the information! I just found some other switches I had from an old project, I’ll have to see if they fit. I know the ones I currently have, have no chance of working.

I am leaning towards Tx/Rx line option because it’s getting pretty crowded on the bottom of the printer. Have you had experience with inconsistent power?

@Sean_B you need really stable power into the pi with current to spare. Also make sure to set the Azteeg to run off printer PSU power (there is a jumper) not powered over the PI usb. It yields more stable performance in my experience.

Oh yes, I saw that jumper. Thanks for the heads up.