Why do the graphs for my printers look like this?

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,


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