FilaWinder Documentation (Page 5 of 16)

hi ian
i've just made some tests

ALL functions  work fine
THANK YOU

hi again
can i plug an i2c lcd on a4 and a5 pin on arduino     A4 for SCL pin  and A5 for SCA pin ,please?

regards
fredaxe

Yes, that was the idea.  I don't have any code written for LCD, but I wanted to make those pins available so it would be possible.

The number of spool turns won't give you a correct count of filament, because the amount of filament spooled with every turn gets larger as the spool fills up.  A better solution would be to make the filament turn a rotary encoder knob, and count turns of the encoder.  You might need Pins 2 and 3 so you can use hardware interrupts with the encoder. 2 and 3 are used by a button and a switch, but you could reassign those to the expansion pins at the bottom of the board.

It's not the filament diameter, but the circumference of the filament wrapped around the spool.  As the spool becomes full, it takes a longer length of filament to wrap one time around the spool.  If the spool hub has a diameter of 5cm, 1 turn of the spool at the beginning will wrap 15.7cm of filament.  As the spool fills, the hub diameter grows.  When there is enough filament loaded on the spool to make a diameter of 8cm, each turn of the spool will wrap 25cm of filament.

As the length of filament pulled with each rotation increases, the speed of the spool will decrease to maintain a constant feed rate.  At the beginning of spooling, the circumference of the hub is known, and you can calculate an average feed rate based on the time between counted rotations before the filament begins to overlap.  Then you can count the length of filament extruded based on the amount of time that has passed since that measurement.

A simpler method would be to position a limit switch close to the spool where the spooled plastic will press it when it gets full enough.

That will work, you just need to wind a full spool first to count how many turns it takes, and do it for each size of spool you use.

http://www.hostingpics.net/viewer.php?i … SC0565.jpg

hi ian
a second pid  is for the hot end of extruder just on the exit
and a spoll turn counter left  lcd
the left knob is a fan speed controller

ok elmoret
i ll be carefull
  but the pid only will work 1h30 max for one full filament spool

I recommend using the 9a firmware so you can use the jumper to switch back and forth between 3mm and 1.75 if you need to.

v9 comes with the libraries in the folder with the sketch.  If you already have the libraries installed in the Arduino Libraries folder, they may fight with each other.  Try taking the QTR and PID_v1 folders out of the Libraries folder in Arduino and then try to compile.