3d printing Flashcards
Drawing - CAD will be converted to STL then use software to convert to gcode. Can use Slic3r If windows - use Tronxy For gco, go to reprap
Uses gears to feed the filament
melts filament at 195 degree celsius. Don’t touch
need a good nozzle for a good print. harden nozzle with daily print lasts 3-5 years. A normal one will last 9 months. have one year warranty.
bigger nozzle (0.4 and above) used to print harder, stronger items and prevent clogs. can also be used to print flexible items depending on spool. use smaller nozzle for fine items. for brass nozzle don’t print carbon fibre or nylon. will wear within 6 hours of printing. normal pla or tpu is fine.
first layer must be 75% of layer height so it will stick well. maximum layer height is 0.32 mm.
faster is carbon 3d by autodesk arpund $10k. a small item takes around 30mins. the printer can last a week 7 days continual printing
sla vs fdm printing
sla will make use of liquid resin. each layer will slowly harden. has an issue - the resin can burn the skin due to allergies. fdm - the nozzle will melt and slowly print out. recently - LCD. LCD is similar to SLA but does not have allergies issues. LCD - cannot see layers so does look nicer. lcd price is cheaper than sla. resin per litre is $80 for sla, but $65 for lcd. lcd is better for jewelry printing.
price of spool
wholesale $19.90 for black, white, transparent. $22 for coloured
marble - $26
how to make line less obvious
select higher end filament like marble and twingling. or slow down the speed of printing.
selective laser sintering
powdered printing that uses laser to harden it. makes stronger items and can print any material - gold, titanium, plastic, stainless steel. one machine will cost a million. there is one at ntu. material - 1 gram costs $1. 1kg costs $1000.
Filament type. Need good ventilation can be toxic. very smooth printing
need to clean up. don’t need to do much post processing except painting with acrylic paint.
can print multi colour and different materials. costs half a million. can see machine demo in 3d printing for women meetup.
safe, biodegradable, less toxic. all plastic melting at more than 100 degrees is toxic. don’t print in an air conditoned environment
food grade, flexible, still slightly toxic when you melt it.
very hard, more durable, water resistant.