Results 1 to 10 of 29
Thread: ABS Not Sticking to Bed
Threaded View
-
06-11-2016, 01:50 PM #29
- Join Date
- Jun 2016
- Posts
- 1
If you don't have anything to check the temperature of your bed and nozzle with, other than what came with your printer (I assume thermistors), I suggest that you purchase a digital multimeter with thermocouple measurement capabilities.
I purchased an Extech M36 Auto-ranging Multimeter, which came complete with a Type K themocouple, good for -20 to +750 deg C. Cost was about $40, and the non-auto-ranging version would have been even less. First thing I did was check the readings with the thermocouple submerged in a pan of boiling water (100 Deg C.) on the kitchen stove. I found the readings with the thermocouple and digital meter to be dead on.
Then I began checking my thermistors and the readings I get with nozzle and bed temperatures against the thermocouple readings and found some interesting things as I progressed.
I had purchased extra ones from the start, figuring they are cheap and a good item to have on hand. I found readings differed as much as 20 Deg C. (37 Deg F) from the thermocouple. Also, I made the mistake of using some of the Silver heat transfer paste that came with my printer kit on a thermistor in the hot head, and the resistance went from 100K to almost a dead short. These thermistors are not hermetically sealed and the paste had apparently shorted out the thermistor.
I no longer use any heat transfer paste on thermisiors. Now I check my thermistors against the thermocouple method before installing a new one, and my results have been much better. The adhesion is so good that often I need to knock off the finished models from the Kapton film with a light blow from a solid object at the end of a run.
I suggest that anyone doing 3D printing check their temperatures to make sure they are getting what they expect. This can save a lot of time and headaches in the long run.
I began by printing ABS, and have no experience with PLA. Using a delta style printer I built from a kit, with heated aluminum bed with Kapton film as the interface between the bed and the part.
Qidi X Plus 3 Paper thin first...
05-27-2024, 01:15 AM in General 3D Printing Discussion