Configuration for Mosquito thermistor & heater
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I have a new RatRig VCore 3, Duet 3 with an SBC and RepRap firmware. I'm struggling with the configuration, probably because I'm not fluent in gcode, but I've got one particular issue of concern. How do I enter the parameters needed for a Slice Mosquito heater and thermistor? The Mosquito comes with a warning that you must configure for a 100k thermistor and if you don’t it can be a fire hazard. So I’d really like to know how to configure this as I can’t find it anywhere. The downloadable config.g is setup for an E3D-V6, so I guess it’s incorrect, but I don't see the settings. Thanks for your help in advance.
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@tomf you can specify the thermistor to use via the config tool and transfer those settings to your current config.g.
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Slice seem to have two different thermistors, but the information for both is at https://docs.google.com/spreadsheets/d/e/2PACX-1vQ5LGUbs4B3uAqrQeEvOqFw1ZFCB3qpAPk3ThCYK9mBS7uiTEF4hjOD6-znxU25MZo19cjhfqDsc06Y/pubhtml
You'll need to know whether you have a 450C or a 300C thermistor (tab at the top of the screen in the google docs to switch between them) .
In the configtool 'Heaters' page you can either fill in the R25 value and Beta value listed on the google doc (leave C at zero), or pick three temperature values that bracket the temperatures you're targeting and put those in the configtool custom option. (In configtool, click in the R25 box, in the popup select 'custom' as preset, fill in six numbers taken from the google docs table, click the 'set' button).
I note that the google doc shows different parameters than the configtool has for 'Slice Engineering high-temperature thermistor', so I wouldn't use the built-in preset.
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@achrn said in Configuration for Mosquito thermistor & heater:
I note that the google doc shows different parameters than the configtool has for 'Slice Engineering high-temperature thermistor', so I wouldn't use the built-in preset.
The preset will give you more accurate readings than using C=0 and the R25 and beta values from that document. Using just R25 and beta values will give significant errors at some temperatures, especially when using a thermistor with a wide temperature range. The preset includes a C term, and when you use a C term, the B term has to change too. The B and C terms used by the preset were calculated using R-T values from the table provided by Slice.
