docs about cleanup

docs/Assignments/week_5_3dprinting_and_scanning/3D_Printing.md

@@ -180,8 +180,42 @@ After that Henk poured in the resin. Always make sure when you're working with r
 After that we where trying to get the file loaded on the machine but it didn't show up. So first Henk formatted the drive to FAT32. Then I also did it on my machine. But after re-plugging the drive in my machine after putting the file back on. The file disappeared so we grabbed another usb stick. With the new usb stick it did read the file so we had a bad usb stick. 
 
 ### Cleaning the printer
+When we where cleaning the machine it got really messy. We needed lot's of paper towels.
+
+Once the print was done we needed to remove the build plate so the print could cure in the vat of alcohol. 
+![alt text](IMG_8426.jpg)
+When removing the plate Henk told us to be careful with the Resin on top to let it drip into the resin reservoir.
+
+After that he submerged the print in alcohol and tied the wire on the top around the lid so the soft resin print didn't touch the bottom or the sides.
+
+When the print was curing Henk told us that we needed a funnel and a filter to put the rest of the resin back in the container so it can be re-used later.
+
+![alt text](IMG_8432.jpg)
+The filter is needed because there could be loose cured parts in the resin which can mess up prints later on if they go into the bottle.
+
+![alt text](image-16.jpg)
+
+![alt text](IMG_8434.jpg)
+Henk also told us to use the plastic scraper when scraping the leftover resin out of the tray.
+After the print finished curing we could remove it from the plate and put it in the curing chamber without the vat of alcohol. 
+![alt text](IMG_8436.jpg)
+![alt text](IMG_8440.jpg)
+
+Then we needed to clean everything we used thoroughly with isopropanol. Otherwise the resin will harden over time and it will be very hard to get it off.
+![alt text](IMG_8442.jpg)
+![alt text](IMG_8441.jpg)
 
 
+![alt text](IMG_8445.jpg)
+![alt text](IMG_8449.jpg)
+![alt text](IMG_8452.jpg)
+Also make sure to clean the bottom of the tray. Otherwise it can harden when it's attached to the resin printer and that could break the printer.
+
+End result:
+![alt text](IMG_8454.jpg)
+
+
+Resin printers are very nice because they are extremely accurate but the only downside is the cleanup after printing.
 ## Assignment
 * [ ] Create something that can't be made subtractively
 * [x] Test printer design rules