I have 4 stepper motors, one for Z-Up and down.

I have 4 stepper motors, one for Z-Up and down. One for X-Left & Right, and Two, for Y, Forward and Backwards. I am using a Tiny G board and there are 4 motor controls. Do I wire the two Y motors separately to Motor 1 control and Motor 2 control? So 2 individual wirings? Or do I tie the motors together and wire them to one of the drivers on the Tiny-G?

Also, I have 2 power supplies, do those get chained together in any way?

If tinyG allows for slaving: one motor goes to one motor control, otherwise 8 wires will go into motor control 2.

One power supply is fine. The board gets power over USB and you’re one supply

TinyG has 4 motor connections. Motor 1 through 4. So should I use all 4 of them since there are 2 motors connected to the X axis? Or are you saying connect both of the X axis motors together and use just one of the Tiny G motor connections?

X goes to motor 1. Y and Y’ motors go to motor 2 UNLESS tinyG allows you to slave (duplicate) commands like a cncshield 3 does.

Depends on your long term plan - A axis in your future?
NEMA 17 or 23 Motors?
2 NEMA23 motors on one driver might be marginal.
Suggested connection - Motor 1 - X axis motor, Motor 2 - Y axis motor 1, Motor 3 - Y axis motor (polarity reversed by firmware setting), Motor 4 - Z axis
See https://github.com/synthetos/TinyG/wiki/Connecting-TinyG
https://github.com/synthetos/TinyG/wiki/Connecting-TinyG

@AMBRO_Manufacturing motor one, check your poles. Videos of this everywhere, touch wires together.
X (as noted above goes to 1, Y= 2 other Y =3 Z =4.
Configuration can be set directly from CP.

@AMBRO_Manufacturing knew there was a video somewhere. This is the harder approach some might say, but gives you an idea of what’s going on back there.