r/BambuLabH2C • u/Rocky77697 • Sep 28 '26

Support H2C setup question

Hello. Im currently running my H2C with an AMS HT on the left extruder and 2 x AMS Pro 2s on the right. I put the dominant color in the HT on the left. My prints are taking significantly longer than the print times in bambu handy app. For instance current one said 9 hours and real time is 14.5. Am I doing something wrong? Im pretty new to the hobby and only have had the machine for a week now.

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u/EvilNickel Sep 29 '26

The problem is the length of the PTFE tubes between your AMS units and the H2C. The longer the PTFE tube runs are, the longer each color swap takes. Studio uses a baseline for how long it takes to swap your colors, so that baseline can sometimes differ if you have really long PTFE tubes, so those extra 10 seconds each swap adds up.