Hot end not coming up to temperature before printing

[John McMahan]

Recently, the hot end of my Orion Delta is not consistently coming up to the target temperature during the initial heat cycle. I have it set at 225 and it just stops heating at a few degrees cooler. I can get it to get up the 225 by manually adjusting the temp to a few degrees hotter (230) and then when it passes 225 I reset the temp back to 225. It stays at the target temperature while printing. Any ideas on what to look at?

[bot]

Look for unintended heat sinks contacting anything around the hot end. (As in, look for bits of the hot end/wires touching anything metal that could draw the heat away from the thermistor/hot end.

Once you're sure everything is clear, make sure the hot end is well insulated with kapton tape. Then, run a PID autotune with the exact conditions you will be printing in.