Josef prusa PRUSA RESEARCH CW1 User manual
USER
MANUAL
FOR ORIGINAL PRUSA CURING AND WASHING MACHINE
ENG
ORIGINAL INSTRUCTIONS
ORIGINAL INSTRUCTIONS: Basic info
Please always refer to the http://www.prusa3d.com/drivers/ for an updated version of this
handbook (PDF download).
Translated versions of the handbook are available at:
Czech: www.prusa3d.cz/ovladace/
French: www.prusa3d.fr/drivers/
German: www.prusa3d.de/treiber/
Polish: https://www.prusa3d.pl/sterowniki/
Italian: www.prusa3d.it/driver/
Spanish: www.prusa3d.es/drivers-y-manuales/
Important notice, tip, hint or information that helps you print with ease.
Read carefully! This part of the text has the greatest importance - either for user safety or for
proper device service.
Product details
•Title: Original Prusa CW1 / Original Prusa Curing and Washing Machine
•Manufacturer: Prusa Research a.s., Partyzánská 188/7A, Prague, 170 00, Czech Republic
•Contacts: phone +420 222 263 718, e-mail: [email protected]
•EEE group: 3 (IT and/or telecommunication equipment)
•Device use: indoor only
•Power supply: Input 100-240VAC, 50/60Hz, 2.0A. Output: 24V, 6.67A, 160W Max.
•Working temperature range: 16 °C - 38 °C, indoor use only
•Working humidity: 85 % or less
Curing and Washing Machine weight (gross / net): 7.8 kg / 6.8 kg. The serial number is located on
the back of the machine and also on the packaging.
Handbook version 1.00 from May 7, 2019 © Prusa Research a.s.
4.1 Unpacking and placement 9
4.2 Starting the device 10
4.3 Preparing the liquid container 10
5.1 Washing an object attached to the platform 11
5.2 After washing 13
8.1 Spilled isopropyl alcohol 16
8.2 Used IPA - Recycling / disposing 16
10.1 The liquid container is inserted, but the Washing mode is not available 17
10.2 Cured prints have white residue on the surface 17
10.3 The device is not turning on 18
10.4 Xoud noises during washing in IPA 18
10.5 Isopropyl alcohol spilled into the CW1 18
About the author
Josef Prusa (born Feb 23rd, 1990) became interested in the 3D printing phenomenon before joining
Prague’s University of Economics in 2009. At Jrst, it was a hobby, a new technology open to changes
and improvements. This hobby soon became a passion and Bosef grew into one of the leading
developers of Adrien Kowyer’s international, open source, RepRap project. Today, you can see the
Prusa design in diNerent versions all around the world - it is one of the most popular printers, so
knowledge about the 3D printing technology signiJcantly increased among the public.
Bo’s work on self-replicating printers (you can print the other printer parts with your printer)
continues, and the latest model, the Prusa i3 MY3S, is currently on the market. It’s an improved
version of the original 3D printer’s third iteration. Prusa Research keeps expanding into new
territories and the Original Prusa CW1 you just purchased is just one of the examples.
Bosef Prusa also organizes workshops for the public and participates in professional conferences
dedicated to the popularization of 3D printing. For example, he lectured at the TEDx conference
in Prague and Vienna, at World Maker Faire in “ew …ork, Maker Faire in Rome and at the Open
Hardware Summit hosted by MIT. Bosef also teaches Arduino at Charles University and was a
lecturer at the Academy of Arts in Prague.
In his own words, he imagines 3D printers will be available in every home in the not-too-distant
future. 'If anything is needed, you can simply print it. In this Jeld, you just push the boundaries
every day” We;re glad you;re part of it with us!L
Josef Prusa
4
Safety instructions
Please be very cautious during any interaction with the machine. The CW1 is an electrical
device with moving parts and UV light emission.
1. The device is for indoor use only. Do not expose the CW1 to rain or snow. Always keep the
machine in a dry environment at a minimum distance of 30 cm from other objects. Make
sure none of the vents/fan outlets are blocked.
2. Always place the machine on a stable surface, where it cannot fall or tip over.
3. The CW1 has an external power supply, which should be connected to a household power
outlet 230 VAC, 50 Hz or 110 VAC / 60 Hz. “ever connect the machine to a diNerent power
supply* it may cause a malfunction or damage to the device.
4. Place the external power adapter and the power cord so you cannot stumble over it, step
on it, or otherwise expose it to any potential damage. Also make sure that the power cord
is not mechanically or otherwise damaged. If so, stop using the damaged power cord
immediately and replace it.
5. When you disconnect the power cord from the socket, pull the plug rather than the cord
to reduce the risk of damage to the plug or to the AC outlet.
6. “ever disassemble the external power supply* it does not contain any parts that could be
repaired by an unskilled worker. All repairs must be performed by a qualiJed technician.
7. Do not reach inside the device while it is still in operation.
8. Prevent children from unsupervised access to the device even when it’s not running.
9. Do not leave the device unattended while it;s still turned on!
10. Do not use this device if it is disassembled or it has parts missing
11. “ever look directly into the UV light.
12. Yeep in mind that resins and isopropyl alcohol are liquids which produce odors. Make sure
the device is set in a ventilated place.
13. Wear gloves and consider using a respirator and protective goggles when handling resins
and isopropyl alcohol
14. Some people may be allergic to resins - either to skin contact or even the vapors. If
you experience any kind of discomfort when working with resins (like itching), stop
immediately and seek medical attention
15. “ever leave the tank containing isopropyl alcohol in the CW1 when the machine is oN.
IPA is a volatile "ammable substance and the concentration of its vapors in the device’s
chamber could be potentially dangerous. If you left the tank with IPA in the CW1, open the
CW1’s lid for several minutes before you turn the device on.
5
1 Introduction
The Original Prusa Curing and Washing Machine (CW1) is a 3-in-1 device designed for quick and
easy post-processing of objects printed from liquid resins.
Objects printed from liquid resin are usually a bit soft and sticky. To clean them and give them
optimal surface properties, the objects need to be washed, dried and cured. This process involves
washing the object in isopropyl alcohol, drying using hot air and curing using UV light. The Original
Prusa Curing and Washing Machine (CW1) can take care of all these actions in 10 minutes. However,
some caution needs to be exercised when handling liquid resins and isopropyl alcohol. Please read
this handbook carefully.
Any time you handle resins (even 3D prints with traces of liquid resin) or isopropyl alcohol, wear
protective gloves! Resins and IPA have distinctive odors - consider wearing a simple respirator in
case you Jnd the odors irritating. The Original Prusa CW1 should be placed in a well-ventilated
area!
2 Package contents and Quick-start info
The Curing and Washing Machine comes with a number of additional tools that will help you cure
and wash your printed models quickly and easily.
The package contains:
•Stainless steel liquid container (gastro pan)
•Magnetic propeller
•Metal basket - for small object washing
•Metal container lid with a print platform
attaching mechanism
•External power supply unit (not pictured)
Recommended accessories (not included):
•Gloves
•Respirator
•Protective Glasses
•Plastic tablecloth
Isopropyl alcohol is not included in the package! Please buy a container with at least 92%
isopropyl alcohol from your local hardware store / online shop. The tank in the CW1 can hold 4
liters (approx 1 gallon) of liquid.
IPA is volatile and "ammable - exercise caution when handling this material.
6
7
3 Curing and Washing Machine - device info
1. Lid - cover made of opaque acrylic. Used to block UV light and contain heat during drying. It
should be closed during drying/curing, but kept open during washing!
2. Control knob - used to control and conJgure the machine. Turn left/right to scroll through
menus, press to conJrm.
3. LCD screen- displays the menu and allows for easy conJguration and control of the device.
4. Power switch - main power switch for the device.
5. External adapter connector - used to connect the external adapter. Make sure the plug is
correctly inserted.
6. RESET switch and MicroUSB port - used for updating the CW1’s Jrmware. The reset button
needs to be pressed with an allen key or similar tool
7. Liquid container proximity sensor - a proximity sensor used to detect whether the liquid
container is inserted or not. Depending on the status (present / not present), the CW1 changes
its operating modes automatically.
8. UV LED panel - the UV XED panel is used to cure models printed from liquid resins: this
hardens a rather soft surface into a solid one.
9. Heater outlet - after you wash an object in isopropyl alcohol, it should be dried before
proceeding. The heater outlet increases the temperature inside the CW1’s chamber, which
accelerates the drying process.
10.Rotating platform - for drying and curing objects detached from the printing platform. The
rotating platform is magnetic, so it also spins the propeller inside the liquid container during
the washing process.
8
4 First-time setup
4.1 Unpacking and placement
After you open the box, remove the accessories case Jrst (1), then remove the top foam (2). Grab the
box using the two handles on the side and pull it up (3). Open the cardboard locks (4) and remove
the foam protectors along with the protective wrap (5). Finally, take the unpacked CW1 and place
it on a stable surface (6).
Open the CW1’s acrylic lid, remove the top foam protector (1), then slide down the lower foam
protector (2) and pull the liquid container along with the protector towards you (3). Remove the
plastic wrap from the tank and take out the metal basket.
9
•Place the machine in a horizontally stable position - the best place is a workbench. A good
practice is to put a plastic tablecloth under the machine in case a resin / IPA spill occurs.
To ensure safe and optimal work experience, the CW1 should to be placed in a location that meets
the following conditions:
•The external power supply should be placed in such a manner that will prevent anyone from
tripping over the cable, or damaging it.
•Do not place the device next to a source of water or into a wet environment
4.2 Starting the device
Connect the external power supply to the CW1 and plug it into the power source. To disconnect
the cable, push the connector’s cover away from the CW1 to unlock the connector, then pull it out.
Turn the device on by using the mechanical switch next to the power supply connector.
Connecting the power supply unit and turning on the machine
Once you turn the CW1 on, the display in the front will light up. The knob next to the display is the
main control device. Rotate it left or right to select items on the screen and push it to conJrm the
selection / change options.
4.3 Preparing the liquid container
Kefore you start the washing process, you need to prepare the isopropyl alcohol bath.
Prepare the stainless steel tank and the magnetic propeller. Place the magnetic propeller into the
tank so it lays "at on the bottom. Klades must point upwards.
10
Carefully pour isopropyl alcohol into the tank. The surface should be about 2-3 cm (about 1 in.)
below the edge of the tank.
5 Washing
Place the liquid container with the propeller and isopropyl alcohol into the CW1 so it ZZrests on the
two guiding rails. ZZThere is a sensor in the back that can detect the presence of the tank. …ou
can tell whether the tank has been correctly placed when the text on the display changes to Start
washing. If the tank is not present, the text will change to Start Drying / Curing.
5.1 Washing an object attached to the platform
We recommend washing the printed object while it’s still attached to the printing platform.
However, if you don’t have the Original Prusa SX1, or if the initial washing did not remove some
resin (e.g. under dense supports), you can use the metal basket to wash the object by itself.
Isopropyl alcohol is a volatile "ammable liquid, don’t leave the lid closed when the liquid
container is in the CW1!
Washing an object attached to the SL1 printing platform
After a print Jnishes, open the acrylic lid of the SX1 and place a protective tray around the resin
tank. Use a plastic spatula or paper towels to wipe resin from the top of the printing platform.
Release the black knob and remove the printing platform - wear gloves!
Carefully move the printing platform to the CW1. Take the metal lid with the attaching mechanism
and push the button at the top with your thumb - this will unlock the mechanism. Slide the printing
platform onto the hexagon-shaped adapter and release the button.
11
“ow place the lid on top of the liquid container so
the print is submerged in isopropyl alcohol. This is the
recommended procedure, because both the platform and
the object are washed. If the object is too large for the
tank, remove it from the platform and wash it twice - Jrst
in >normal> orientation, then rotate it upside down and
wash it again.
Select Start washing on the display and the machine
will wash the object for 3ZZ minutesZZ (default value).
…ou can change the washing time by either rotating
the knob during the process or by selecting Run-time
option before the print. We do not recommend washing
objects in isopropyl alcohol for more than 10 minutes -
tiny cracks may appear on the surface of printed objects
(even after more than 24 hours), which is the result of a
long exposure to IPA.
If you print a very tall object (e.g. maximum print volume of the SX1), it’s possible the object will
collide with the propeller at the bottom of the tank. Consider detaching the object from the
printing platform and washing it using the metal basket. Wash the printing platform separately.
Washing small objects / objects removed from the printing platform
After a print Jnishes, open the lid of the SX1 and place a protective tray around the resin tank. Use
a plastic spatula or paper towels to clean the top of the printing platform. Release the black knob
and remove the printing platform - wear gloves!
12
Use a metal spatula to remove the printed
object from the printing platform. …ou can also
consider removing the supports at this point.
Place the object in the metal basket and insert it into the liquid
container. Place the liquid container into the CW1 so it rests on the
guiding rails.
Select Start washing on the display and the machine will wash the
object for 3 minutes (default value). …ou can change the washing
time by either rotating the knob during the process or by selecting
Run-time option before the print. We do not recommend washing
objects in isopropyl alcohol for more than 10 minutes - tiny cracks
may appear on the surface of printed objects (even after more than
24 hours), which is the result of a long exposure to IPA.
If you printed a large object that doesn’t At the container, wash it in two stages: Jrst, submerge
it in IPA as usual and run the washing process. Then, take the object out, rotate it upside down and
put it in IPA again to wash the part that wasn’t submerged in the Jrst run.
5.2 After washing
Wearing protective gloves, remove the object from the tank and remove the tank itself as well. …ou
can now dry and cure the model.
13
6 Drying and curing
After you wash the object in isopropyl alcohol, we recommend rinsing it brie‘y under running
water to remove the remnants of isopropyl alcohol. Then, dry it with a paper towel. Remove the tank
from the CW1 and place the object on the rotating platform. Don’t place it in the center, instead,
place it near the edge of the platform. Another option is to insert the whole printing platform with
the object still attached.
Two object placement options for drying and curing procedures. If you place the object on the rotating
platform, place it near the edges, not in the center
Close the lid. The CW1 will recognize that the tank has been removed and oNer Drying and Curing
modes on the XCD screen. Ilways keep the lid closed - there’s a safety switch in the lid that will
stop the process in case you open the lid. Select QStart drying/curing’ on the LCD screen.
The drying and curing times are set to 3 minutes each. It’s a default value that works well for a
majority of 3D printed objects. In case you would still Jnd the object a bit sticky, you can re-run
the process until you reach the optimal result. …ou can set the run-times either via the Run-time
menu or during the process itself by rotating the knob.
Once these actions Jnish, the CW1 will let you know with a beep (default settings, the sound
notiJcation can be disabled).
14
7 Menu structure
Start drying / curing (without tank)
Start washing (with tank inserted)
3VO5JNF
v8BTIJOHSVOUJNF
v%SZJOHSVOUJNF
v$VSJOHSVOUJNF
3PUBUJPOTQFFE
v$VSJOHTQFFE
v8BTIJOHTQFFE
4FUUJOHT
v"EWBODFETFUUJOHT
3VO.PEF%SZJOH$VSJOH%SZJOH$VSJOH
1SFIFBU
v1SFIFBU&OBCMF%JTBCMF
v5BSHFUUFNQ
6OJUTZTUFN4**NQFSJBM64
4PVOETFUUJOHT
v4PVOESFTQPOTFZFTOP
v'JOJTICFFQOPOFPODFDPOUJOVPVT
*OGPSNBUJPO
Press the knob while any of the processes are running to open the options:
•Pause / Continue
•Stop
•Kack
Default values for time and rotation speeds are factory tested and work well in a majority of
scenarios. Washing printed objects in IPA for more than 10 minutes is not recommended. Rotate
the knob during washing/drying/curing to increase or decrease the run-time.
15
8 CW1 Maintenance
To ensure that the CW1 remains in proper working order, keep the device clean and never leave
the tank with isopropyl alcohol inside of the device when the machine is o? / not being used.
Clean any resin drops or stains immediately, before they solidify.
8.1 Spilled isopropyl alcohol
withstand a moderate 6PI spill
keep a plastic tablecloth under the device
6n case a spill occursdisconnect the machine from the power
supply,
8.2 Used IPA - Recycling / disposing
9 Firmware update
A new window will open. Make sure that the Original Prusa CW1 is selected. Then click Open File
and select the unpacked Jle from step 1.
Click Flash! and wait until the process is Jnished.
Disconnect the microUSK cable and restart the CW1.
10 Troubleshooting
10.1 The liquid container is inserted, but the Washing mode is not available
Make sure the liquid container is inserted correctly. It should sit on top of the two guiding rails
and it should be as close to the back plate of the CW1 as possible. …ou can check the proximity
sensor’s functionality by covering it with your Jnger. If the on-screen option changes from Start
Drying/Curing to Start Washing, then it works correctly. If it doesn’t, please contact tech support
or refer to the Helpdocs section at help.prusa3d.com.
10.2 Cured prints have white residue on the surface
This happens when you start curing a model that still has a combination of liquid resin and isopropyl
alcohol on its surface. Apply warm water onto the object and rub the excess material oN. …ou can
also use a small brush. To prevent residue from accumulating, you can wash the object in water
AFTER you wash it in isopropyl alcohol.
17
10.3 The device is not turning on
Make sure the external adapter is properly connected and that the main switch on the rear side of
the device is switched to '1L. The external adapter has a status XED - check whether it lights up. If
it doesn’t, double check the power cable. If there are no problems with the cables, contact our tech
support.
10.4 Loud noises during washing in IPA
This happens usually when the washed object collides with the propeller in the liquid container. Try
removing the printed object and run the washing process with an empty container.
10.5 Isopropyl alcohol spilled into the CW1
See chapter 8.1 - Spilled isopropyl alcohol for instructions on how to deal with an IPA spill.
11 F.A.Q. - Frequently Asked Questions
2: 6s it necessary to dry a freshly washed object before putting it in the CW18
A: “o, few drops of IPA are perfectly Jne and they will evaporate quickly. However, leftover IPA
combined with liquid resin may create white stains on dried/cured objects. See chapter 9.2 Cured
prints have white residue on the surface.
2: How often do 6 need to replace the 6PI in the container8
A: This depends on frequency of washing, but from our experience, the IPA loses its washing
properties after around 2 months of frequent use
2: Can 6 wash an object multiple times8
A: …es, but the total time should not exceed 10 minutes. Tiny cracks may appear on objects that
were washed for too long (even after 24 hours).
2: Why does the CW1 use 6PI bath with a propeller instead of ultrasonic washing8
A: Our method has the same eNiciency as ultrasonic washing and it’s less aggressive when washing
small objects or objects with tiny details
2: Can 6 cure an object multiple times8
A: …es, extended exposure to UV light is not a problem
2: Can 6 cure the resin/6PI mixture in the liquid container8
A: This procedure has no eNect and won’t separate the IPA from resin
18
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