Very slow bed heating
I have a delta with a mains powered bed which has been working well up until now. Ive noticed that the bed now takes forever to heat up, at the rate of about 0.1° per second. It sometimes just stays at the same temp even though I can see the power (green on the temp graph) is full. It used to heat at the rate of 1-2° per sec. Nothing has changed on the printer harware/wiring wise and I have tried PID tuning etc. Im pretty sure its been set on PID heat manager for the bed, but the system uses an SSR and I have now read that Bang-Bang is better for that. Would the slow heating be due to a failing SSR? The light on the SSR still comes on when heating, but im stumped as to why its so slow.