<p>Why do concrete 3D printers lay the concrete in a zigzag shape? I know pouring it in a straight line makes it unstable, but the zigzag shape reduces the contact of the top layer to the layer below. What is the advantage?</p>

According to
'The-EG' comment
in this GitHub issue,
Add Creality Ender 2 Pro config #633
, you can often determine the stepper drivers by one of a few ways:
Listen to the sound. The 'TMC22**' will sound much quieter
Look for a marking in Sharpie on the SD Card reader
```
```
C = HR4998
E = A4988
A = TMC2208
B = TMC2209
H = TMC2225
```
```
Remove the heat sync
https://github.com/MarlinFirmware/Configurations/pull/633#issuecomment-995480295
After removing the heat sync, it appears that the Chip is actually a
```
MS35775
```