V4 vs V3B actual temp

[jereywolf]

When using the V4 do you set your desired temp roughly 20°C over what you actually want, the way that it's done with the V3B?

[sthone]

I use the same temps for the V4 that I used on my V3B. I've never gone higher than what I wanted though, If my filament calls for 215° I set S3D at 215°.

-Steve

[rpollack]

@jereywolf - you should not need to do that with the v3b. Are you using a 24v v3b on a 19v M2 with the original firmware?

Rick

[jereywolf]

I don't think so Rick. I bought my M2 in February 2014. I'm pretty sure mine was after the update. I thought that we all did that (set the extruder temp higher). We talk about ABS printing at 225°C but set temp in our settings to 245°C.

In this thread, second post, I found a reference to that.

viewtopic.php?f=2&t=103&p=714&hilit

[rpollack]

you may want to contact support as you should not need to do that.

[insta]

Rick, he's referring to the difference between the V3 and V3b's temperature reporting because of thermistor position.

[benavery]

Many users here had first exposure to extrusion temperatures with our very first M2 print, and the documentation all tell us to 'use temp X on v3, or temp Y on v3b' so we subconsciously just start to believe that real temperature is never the same as the number we type into s3D. Perhaps the reality is that v3(a) was the only one that required adjustments, as it sounds like v3b == v4 == e3d, but I will admit I had similar thoughts when I first unpacked my V4 "Do I need to add, or subtract from temps to use this new hotend", and it stemmed from those v3a/v3b differences.

[jimc]

These days most current hot ends use some type of cartridge heater in a block. These all read generally the same from brand to brand since the thermistor is in the block. That 20deg difference was just from where the thermistor was reading temps in the older style hot ends. V3a was directly on the nozzle so it read a little cooler. V3b, v4 or any other current block style hot end should be close in temp readout.