Frequent Ask Questions LCHR - Photocentric3D
Photocentric3D Frequent Ask Questions. 3D Resins questions, 3D Printer Questions.
Frequent Ask Questions, Resin questions, Printer questions, FAQ´s, Liquid Crystal HR
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Q: What is the difference between Daylight and UV 3D resin?

A: Daylight resin can only be used in Liquid Crystal 3D printers; UV resin is designed for DLP and laser 3D printers that use the UV spectrum. The polymers are identical in performance; the main difference is just that Daylight resin uses photons at about 460nm to create free radicals to join the chains and UV uses 350 to 405nm photons. Daylight resin can never be completely clear.

Q: How do I store unused resin?

A: We recommend pouring the resin back into the bottle through a sieve from the vat to remove any solid parts.

Q: What shrinkage should I expect?

A: Hard resins will shrink by approximately 6%, Firm by 6% and Flexible 4%.

Q: Can I mix different resins in the VAT?

A: No, we do not advise mixing resins as they may have slightly different cure speeds.

Q: Do you have castable resin?

A: Yes we offer a castable resin in Daylight resin.

Q: How can I dispose of the resin?

A: The resin is a skin irritant, wear gloves when in contact with it. Remove as much liquid from the platform and object as possible with paper. Waste paper can be left in sunlight for a few minutes to harden and then be disposed of. Place the platform in a washing-up bowl and clean the object. You can leave the washing bowl in sunlight for a few minutes to harden any resin and this can be disposed of as solid waste.

Q: The resin changes colour, is that correct?

A: It is normal in Daylight resin. It will have a certain colour when liquid, then change to the final colour once cured and post exposed. Make sure you shake the resin bottle before use.

Q: What is the product shelf life?

A: The product will last for 1 year when kept at room temperature and away from sunlight in original packaging.

Q: Will the UV resins work with my DLP or Laser printer?

A: UV uses 350 to 405nm photons. Our UV resins will work with your DLP or Laser printer. You may need to adjust the curing time. Forums online may already have run tests on your printer and can provide detailed information.

 

Q: Can I use daylight resin to bond 2 parts together?

A: Yes, if you bond them before either of your parts has been post exposed. Apply the resin to the join and then post expose the item (in a UV unit or in sunlight) for 10 minutes.

Q: Which type of glue is suitable for your resin when the product is printed?

A: Mostly we use resin to bond parts- the bond is stronger if parts have not been post exposed, then post expose all together. We do use low viscosity low odour cyano also or a 2 part epoxy.

Q: Are post exposed parts watertight?

A: Hard parts are watertight, soft and flexible ones are not. All polymers may absorb water after prolonged immersion.

Q: How stable are the parts over time?

A: Like all polymers cured with UV they will be eventually weakened by UV, but our polymers are tough and have a UV absorber to prevent light degradation. For maximum life, store the parts out of sunlight and in a dry, stable environment.

Q: How do I make the part less sticky?

A: Post expose under water in bright sunlight for 15 minutes or in a UV unit for 10 minutes.

Q: My part has a bit missing where the supports were attached.

A: If the support is too wide and strong it will be difficult to break off. Reduce the width of the joining tip of the support or cut it off lower down and sand the stub off.

Q: Can I sand the final print?

A: Yes, once post exposed and dry, the print can be sanded.

Q: Can I paint the final print?

A: Yes, once post exposed and dry, the print can be painted.

Q: What is the main difference between the Liquid Crystal 10″ and the Liquid Crystal HR?

A: The main difference is the screen. The improved High Resolution screen has pixels more than two times smaller giving higher definition prints. The drive unit has also been upgraded to an all-in-one system allowing for more accurate and repeatable prints. Wi-Fi connectivity coupled with a touchscreen allows the Liquid Crystal HR to be untethered from a pc. Finally, the vat has been designed to be easier to use and longer lasting.

Q: Why do I need a vat film?

A: The film is the base of the vat and protects your screen. It needs replacing from time to time when it gets damaged.

Q: How long will the vat film last?

A: Depending on the size and shape of objects you are printing; the film may need changing every 20 to 30 prints. Unlike the Liquid Crystal 10″ vat, the film will lose its tension slower and therefore can last longer. Change it when it is damaged or looks cloudy. In order to extend the use of the film, follow the instructions on how to clean after each print.

Q: How do I send my files to the printer?

A: You can send files to the printer in two ways; from a pc or USB. You can upload, slice, and send a file to print from PrintFlow3d on your pc. You can also upload pre sliced files from a USB.

Q: How do I update the software on the printer?

A: The printer will automatically update when connected to the internet and restarted. Alternatively, the printer can be updated by going to ‘Settings’ and ‘Update’ on the touchscreen.

Q: How do I know how much resin to use for my print?

A: It is possible to calculate it exactly from the object volume; 1 cm3 = 1.2g of resin. In practise, it’s easier just to over-fill and re-use the resin. Fill it a quarter of the way up the vat for most prints. for large ones fill it half full.

Q: I have resin on the screen. What is the best way to clean it?

A: Remove all the liquid with a tissue, then carefully scrape solid lumps off with a flat non-serrated edge. You can scrape very gently, at an acute angle, with a razor blade to chip off cured polymer. IPA will help soften the solid resin and remove the screen

Q: Can you make a part for me if I send you a file?

A: Yes, if you email us the file, we will advise the cost to make it.

Q: Do you have plans for better software?

A: Yes we have a software development underway now.

Q: Can I use your printer with a Mac computer?

A: Yes. PrintFlow3D can be used with a Mac

Q: Can I use an alternative software?

A: You can use an alternative software, such as Creation Workshop, to create a pre sliced .zip file which can be put on the printer using a USB.

Q: Do you have any anti aliasing?

A: PrintFlow3d doesn’t but can be added if people decide it desirable. We don’t believe it is needed on the Hi Res screen.