Why do the graphs for my printers look like this?

Vaz

Good morning everyone,

I have two printers connected to the latest version of Repetier Server which is running on a raspberry pi 3B+.

Printer 1: Ender 3 Pro with SKR Mini E3 B2 board
Printer 2: Stock Ender 3 V2

Both printers were printing the same file but with 30-minute print start delay between them and I noticed that the graphs look quite different. Why is this?

Link to image here

Am I correct in understanding the graph which his telling me that the Ender 3 Pro is finding it difficult to hold the temperature?

Many thanks,
Vaz

Repetier

No there is no problem holding temperature. See temperature range on the left. The left one has a narrow range since temperature was high for more than 5 minutes. So the deviation you see are nothing and completely normal.
On the right you see extruder was off in last 5 minutes so temperatures range from 0 to 200 and not 195-205. So small swings are not visible at that scale but still there. So both behave the same and these tiny swings are to expect so everything is good.  

Vaz

Ah, that makes sense. Thank you for your explanation.