I recently purchased the Da Vinci Jr  and I asked my teacher if he had any extra filament I could have, so he have me about 100m of fillament. Once the printer arrived I realized I can not use alternate spools. The filament is the same size and as far as I can tell with given specs it is the same. Can I re-spool the old roll with the new material and the machine be fine with it? Will my warranty or anything of that sort be ruined? Also Can I remove 100% of the filament from the machine if something goes wrong?

The Jr. Has a RFID chip in each spool that tracks consumption. Once the amount used equals the max of that roll the spool is put on black list and can no longer be used.

If you are good at programming and code altering then there is a thread call Da Vinci Jr Reset where they have poretty much made a workaround to use other filaments but the process is not easy.