At times, you may find yourself needing to drain the vat whether to change out material, inspect/replace the membrane, or to clean up a spill. There are two ways to drain the vat: using the peristaltic pump or manually draining it with a syringe.
Draining the vat with the pump is slower in most cases but is useful for more automated workflows or if you prefer that the machine drain itself rather unattended. As mentioned in the filling the vat guide, each material requires its own nozzle/hose, as they cannot be easily cleaned and can cross contaminate resin. You can purchase additional Material Changeover Kits and read about how to use them here.
The syringe method works well if you prefer rapid draining or are working with high viscosity resins (it is recommended you cut a large hole in the syringe opening with high viscosity resins). You will need a funnel, a filter and the syringe (all included in your starter kit). A soft-tipped syringe should be used to avoid damaging the membrane.
Step 1, Option 1 | Using the Pump
Prepare resin container for draining
Use cap with hose fitting and attach hose to cap
Place container on load cell
Ensure the hose is well seated inside the pump and broken in
Make sure there is enough room in your resin container to hold the drained resin or you risk overflow.
Clip nozzle to the vat.
Go to Dashboard on the touchscreen and press Drain under the Resin Vat section.
You should hear the pump kick on and after a few seconds the nozzle will start suctioning out the resin.
As the resin level gets low, use the spatula to push resin towards the nozzle.
Press Stop on the touchscreen when you are done.
Step 1, Option 2 | Using the Soft-Tipped Syringe
Place a funnel with a filter over the resin bottle. The filter ensures cured pieces of resin and debris don't get drain back into your supply of resin.
Use the included syringe to suction out resin. The syringe should have a few cm of elastic hose on the tip.
Hold the syringe at an angle.
Work outside the printable area of the membrane.
For viscous material you can cut the syringe tip larger, but cover with soft hose to prevent membrane damage. If you lost the hose, any soft material with 8mm ID will work (such as viton flouroelastomer hose with 1mm wall)
As the resin gets low, use the spatula to pool the resin up into a corner, making it easier to suction out with the syringe.
Step 2 | Clean the Membrane & Vat
Wipe the excess resin off the vat and membrane surface. Attempt to get most of it off in this manner
Wipe down the surfaces using IPA now to better clean the surface
Unclamp the vat and pull it out upside down to avoid dripping resin
Wipe the underside of the vat that seals against the membrane with IPA.
With IPA, wipe the remaining resin on the membrane that pooled up near the seal
Once your membrane is clean, you can use it with another resin or clean up the edges of the