Re: Temperature drop from 208 to 195
dont give up. can you take some photos of your hotend? might help. also, which type of filament are you using? if pla, do you have a fan blowing on the hotend body?
View ArticleRe: Temperature drop from 208 to 195
Hi, I'm using this variant: [www.printedparts.nl] It has a 6.8 Ohm resistor and a 100k Thermistor. I have wrapped the resistor with alufoil, removed the metal ring and added a wooden plate between the...
View ArticleRe: Temperature drop from 208 to 195
While power off, measure the resistance between the V+ of the psu, and the point where the extruder resistor connects to the mosfet. This is to say measure the resistor resistance but at some point...
View ArticleRe: Temperature drop from 208 to 195
Oh, do you really mean you have a hotend like this one? Looks like 2 washers sandwich with resistor in between and the empty space filled with silicone. Or is it an actual metal block there? I am not...
View ArticleRe: Temperature drop from 208 to 195
I have been trying autotune PID three more times: P - 76.38 I - 3.50 D - 416.74 P - 55.12 I - 2.26 D - 335.92 P - 224.02 I - 29.47 D - 425.75 Very inconsistent values. Is this normal? Set with: M303...
View ArticleRe: Temperature drop from 208 to 195
Usually if the derrivative part is too big, it crashes the system. That is what i know from dynamic systems control. Derivative part is what gives it the responsiveness, makes the system react faster,...
View ArticleRe: Temperature drop from 208 to 195
Okay, I will test Bang-bang first, I have commented the line that creates PID settings, so I guess it's bang-bang from here on up. The temperature seems to go up quicker on the hotend, with about 1.2...
View ArticleRe: Temperature drop from 208 to 195
Check these to have 256, not lower: #define BANG_MAX 256 // limits current to nozzle while in bang-bang mode; 256=full current #define PID_MAX 256 // limits current to nozzle while PID is active (see...
View ArticleRe: Temperature drop from 208 to 195
Hi, I have these values in there: // PID settings: // Comment the following line to disable PID and enable bang-bang. // #define PIDTEMP #define BANG_MAX 256 // limits current to nozzle while in...
View ArticleRe: Temperature drop from 208 to 195
The resistance increases a little at high temperatures, but seems there are no shorts and measurements feel reasonable. So i understand the extruder heater properly stays at high temperature now? What...
View ArticleRe: Temperature drop from 208 to 195
When I took that picture, I had turned down the heatbed to 80 degrees celsius, but I want it to be 110 degrees! No temp drops indeed, but when I put the bed temp to 85 the hotend starts having...
View ArticleRe: Temperature drop from 208 to 195
Silly q: What thermistors are you using on the hot end & the bed (aka what did you choose in the marlin config)? I doubt this is the issue, but could some of this be caused by the granularity of...
View ArticleRe: Temperature drop from 208 to 195
Ok, they are 100k thermistors, I have chosen the correct ones in the firmware, don't worry ;) The swings aren't wild/quick btw, it's just constant, and then suddenly it drops without stopping the drop...
View ArticleRe: Temperature drop from 208 to 195
There are a lot of 100k thermistors out there, and they all have different temperature graphs. That could of course explain the temp difference. Too much metal/ceramic glue/kapton around the...
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HuanYu Future PCB Technologies Co., Ltd Main supply Double-sided PCBs, Double-sided flexible PCB ,High-density multilayer PCB,Multilayer flexible PCBs ,Rigid-flex PCBs ,Single-sided aluminum core pcb...
View ArticleRe: Temperature drop from 208 to 195
The thermistors are "interchangeable" only in 0-150C interval. After that point, each thermistor has its own mind, even from same lot. If you really want accuracy you have to calibrate the thermistor...
View ArticleRe: Temperature drop from 208 to 195
Alright I will look into the thermistor part, thought I dont know if a thermocouple cost a lot of money, considering I'd rather spend money on other parts. I am still having difficulties with the...
View ArticleRe: Temperature drop from 208 to 195
I was refering to multimeters which can measure temperature and for this purpose they come with a thermocouple probe. If you dont calibrate with something like that, then at least keep in mind that...
View ArticleRe: Temperature drop from 208 to 195
I am now conducting some printbed material research. I have made a printbed design and lasercutted it this afternoon. 2 different translucent acrylic ones, a white one (PetG) and a red acrylic one....
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