Qidi Tech 1 - Replicator 1 clone

[Percoseth]

I've been doing a lot of printing with my Tech 1, but have given it a break for about 2 weeks. I fired it up last night to print something for my wife and noticed the temperature of my print bed is fluctuating drastically. Both on the printer lcd and in S3D it randomly jumps to different temps. Just when I turned it on, I'm watching it go from 7 to 16, then to 40, back down to 6. All of this in about 20 seconds. Anybody know what would cause this?

[Talon 3D]

Weird, I wonder if it is fans powering up and down and such.
Have you actually printed anything?

I've been doing a lot of printing with my Tech 1, but have given it a break for about 2 weeks. I fired it up last night to print something for my wife and noticed the temperature of my print bed is fluctuating drastically. Both on the printer lcd and in S3D it randomly jumps to different temps. Just when I turned it on, I'm watching it go from 7 to 16, then to 40, back down to 6. All of this in about 20 seconds. Anybody know what would cause this?

[Percoseth]

I first noticed it during a print. I was printing with PLA and had it set to 50. It was jumping all around a 30ish degree range. It wen from 45 to 67, and back down to 40 in a matter of seconds. I know the actual temp isn't fluctuating that much.

Weird, I wonder if it is fans powering up and down and such.
Have you actually printed anything?

[wirlybird]

Check for loose connections on the bed and on the main board. Look for any pinched wires.

I've been doing a lot of printing with my Tech 1, but have given it a break for about 2 weeks. I fired it up last night to print something for my wife and noticed the temperature of my print bed is fluctuating drastically. Both on the printer lcd and in S3D it randomly jumps to different temps. Just when I turned it on, I'm watching it go from 7 to 16, then to 40, back down to 6. All of this in about 20 seconds. Anybody know what would cause this?

[DaveB]

Check for loose connections on the bed and on the main board. Look for any pinched wires.

You might swap the two extruder's heater and temperature sensor plug connections at the motherboard and see if the problem followed those. If the problem follows the swapped components, then the issue is most likely associated with those swapped components. As physical temperature involves significant thermal inertia, the issue is most probably with the temperature sensor. Bad connections / a failed temperature sensor are probable. Replacement parts are available from QiDi and there are videos on you tube (search for "qidi tech") showing how to perform the replacement. If your QiDi is still under waranty, contact QiDi for the parts. Sometimes they will ship via DHL which will cut several weeks off the delivery.