Embedded Files
Introduction
Introduction
My Cafelat Robot info page.
Purchased 10/24, white store demo unit
Links
Links
https://www.cafelat.co.uk/blogs/cafelat-robot-manual/how-to-use
https://www.cafelat.co.uk/blogs/blogs/cafelat-robot-portafilter-pressurised Locking portafilter
https://www.home-barista.com/blog/cafelat-robot-review-t54483.html
https://www.home-barista.com/levers/cafelat-robot-user-experience-t54550.html Really long thread at hb
Use
Use
Using paper filters on bottom and top under screen. Top filters came with aeropress ones. Bottom are 53mm filters I had that I trim slightly to fit in bottom of basket.
Grinder is my df64 with SSP MP V2 burrs.
rdt and grind. Wet paper filter, put in bottom of basket, add exactly 17 gr coffee.
Preheat piston and portafilter, then overflow basket to further preheat.
17gr in, 36-40 gr out
20 pre infusion at 2 bar ish, then ramp up to about 6 bar and let ramp down at end of shot.
Aim for 40 sec total time, including the 20 sec pre infusion step
Preheating
Preheating
https://www.home-barista.com/levers/cafelat-robot-temperature-tests-t65550.html preheat graph
Over Pour
Over Pour
Simple way to preheat is the over pour when you fill up the basket with hot water.
Use boiling hot water. I tip my basket/portafilter when I start the fill, and slowly bring to level as I fill. I put it over a measuring cup, and keep filling after its full, overflowing the basket to get the water in the basket hotter. I overflow for 15-20 secs, pouring slowly.
Some people fill the basket, then dump the water and fill again, but over-pouring is easier to me.
Portafilter
Portafilter
Found a little trick to heat the portafilter in my kettle.
I put the plunger section of my aeropress in the portafiter to keep it from falling into the kettle. I've taken the rubber piece off of plunger.
If I don' use the aeropress plunger, the portafilter will fall into my kettle. With the plunger inserted into the portafilter, its impossible for it to fall in.
I put the kettle cover on top of them, and the portafilter heats up as the kettle heats up.
Hot plate for piston
Hot plate for piston
I think this hot plate preheat works better than a cup of hot water.
You have to push both buttons on the hot plate to turn the heater on, so can't put it on a smart plug.
With the correct charger, I start it when I start shot prep, when I turn on my kettle. I'm sure the piston isn't completely hot het, but it seems hot enough if I do this.
I'm setting target temp at 110C, but may try a little higher.
Might be me, but I've found I like the shots better when I preheat the piston.
Maybe $30 for all parts required, hot plate, charger and stand. I bought stand with many other 3d parts so estimated just $5 for stand, would be a little more if you bought by itself from someone. If you don't have a printer and don't want to buy a stand, you can turn over a cup of the right height.
https://www.home-barista.com/levers/simple-cheap-cafelat-robot-piston-heater-t96220.html#p1010871
https://stefan.antoni.io/preheating-the-cafelat-robot/
Parts
https://www.printables.com/model/1038489-heat-plate-stand-for-cafelat-robot/files stand for hot plate
https://www.amazon.com/HUIOP-Digital-Soldering-Preheating-Station/dp/B0CS5R9J36 G3061 hot plate
Charger for hot plate
PD 65w 20v 3.25A Charger
I tried a charger I had. First one reset the heat plate whenever I tried to turn the heater on. 2nd one worked, but only at about 9V so is slower. I bought the 2nd charger below, but might buy the GAN charger later.
Bought the $12 one, not hot plate heats up really fast. Voltage is just under 20V.
USE: Plug it in, wait a few secs for it to start up, starts up in standby mode. Short push on both buttons sets to heat mode.
Change temperature by short press of buttons.
I didn't change any of the other heater settings
The display changes to CT when it reaches the target temperature
Cup under Piston
Cup under Piston
Works, but I like the hot plate method above better.
I have a wide cup about 54 mm (2.2 in) tall.
I place the cup on top of the aeropress filter holder, and it fits perfectly under the robot piston.
One in place, I lower the piston, and then fill cup with water to below the bolt and leave while I prep the shot.
Blind Plug
Blind Plug
Use aeropress plunger, push into double spout, insert into bottom and preheat spout.
Alternative is to plug spout holes with food safe rtv.
Add wire or string to double spout to make it easier to pull out.
I tried this method, but found it to be cumbersome and water came out when I brought the plunger down so I used the cup under piston or hot plate instead.
https://www.home-barista.com/levers/cafelat-robot-user-experience-t54550-4090.html#p840700
Preheating for medium and medium light roasts is no longer a problem for me. I bought a 58mm silicone backflush disc which I put into a basket. Just fill this basket with boiling water and lock it in. In the meantime, you can do your puck prep in a second basket. By the time you are done, the piston will be preheated and the portafilter will be warm. You can re-repeat this to get the piston and the portafilter even hotter. I saw this method in one of the threads.
stick on heater
stick on heater
Thought about, but ended up with using hot plate instead.
https://www.reddit.com/r/CafelatRobot/comments/11fq3v8/diy_robot_modifications/
two 25x50 mm (0.98x1.97 inch) 12V 7W polyimide heater
Spare Parts
Spare Parts
Orphan has screen, silicon piston seal, basket plug, paper filters, and custom accessories.
https://www.orphanespresso.com/cafelat-robot-parts--accessories Professional basket $28 from orphan
Prima has screen, silicon piston seal, basket plug, paper filters, and many other parts, but some stuff is out of stock now (11/24)
$60 (free ship) for basket, screen, 5 pack screen pins and 3 seals
$64 with shipping, basket, screen, 5 pack screen pins and 3 seals
Idrinkcoffee carries many parts, but many OOS
https://idrinkcoffee.com/en-us/collections/cafelat
3d Printed Parts
3d Printed Parts
Pressure gauge mount (manometer bracket) White
Leveling Tamper 10% (robot tamper) Black
Portafilter Handle 35 infill (Cafelat Robot Portafilter Handle top and bottom) Black
Shoulder Clip 20% infill PLA White
Arm Stopper 15% infill White. Bought but could use, hose from pressure gauge got in the way.
heat plate stand Black if link does not work, go to printables.com, and search for "cafelat robot heat plate"
DF64 dosing ramp Black
Ordered:
3x Cafelat Robot Portafilter Handle top and bottom
1x Shoulder clip spacers (0.5mm - 2.0 mm)
2x shoulder clips (normal, 0.5mm thicker and 0.5mm thinner)
1x G3051 PD65W stand for cafelat robot
2x DF64 dosing ramp
1x tamper leveler Santiago
2x CafelatRobot ArmHolder
1x robot tamper
2x manometer bracket
Cost was just under $40 with shipping for parts ordered to 50 infill, petg material
Paper Filters
Paper Filters
TOP
Tried the ones that came with, but now use the larger aeropress filters. I spray them a few times with water, then stick to to metal filter. After tamping, push down. Paper is larger then basket but since its wet it bends up easily.
57.45 mm for top
https://www.home-barista.com/levers/simple-cheap-cafelat-robot-piston-heater-t96220.html#p1010871
https://stefan.antoni.io/preheating-the-cafelat-robot/
Buy a 2.5 inch circle hole punch, then cut them out of any filter paper. (63.5 mm)
The EKTools 2.5 inch punch is $24 on amazon, 100 Chemex filters are $10, makes 1600 circles
BOTTOM
I am using 51mm (2") paper filters I already had, fold them twice so they are quarter size, then trim sliver from edge so they fit on bottom of basket.
OR
"The EK Tools 1.75" circle punch, model 54-31002 (~$15) works like a charm to cut the filters to the right size."
Shoulder Clip - Arms up
Shoulder Clip - Arms up
Shoulder Clip 20% infill PLA White. I used 50% infill, PETG as for the material.
My arms are a bit loose, but none of the spacers would fit, even the thinnest one.
I used the .5mm thicker version of the shoulder clip, works great. Really like this mod, makes it much easier to have the arms stay up just by bringing the up all the way. And just a little force required to move them out of the up position.
Moving Gauge to Top
Moving Gauge to Top
For me, I like the gauge a LOT better on top. Makes it much easier to see as you pull the shot.
Pressure gauge mount 3d printed part
Used this 3d part to more pressure gauge. It doesn't move when you move the arms to pull a shot. Only part I needed, was able to use the same screw. Thought I would need a longer screw with the 3d mount, but original one was still long enough.
Hardest part of this was pulling out both parts of the screw on top of the robot that holds the arms. I pulled them out to turn them around, so long female side comes in from the front, and short male screw goes into the back. Takes a few minutes go get the female side back though the arms and spacers. Take your time. I moved the arms up and down a bit to get them and the spacers in position to get the screw to go through.
Rest is easy. Use a small metric allen wrench to loosen 2 screws that hold the pressure gauge to the arm. Move gauge to top, and tighten screws again.
Makes it much easier to see as I pull shots.
Leveling Tampler
Leveling Tampler
I ordered this 3d part from treatstock. May basket seems to be on the large size, because there was a lot of play, and so I could still get non level tamps.
So I ordered a bullseye level.
Sanded the top of the handle a little bit to make if flatter, then used earthquake putty to mount the level to the top of the handle, and made sure bubble was centered when the tamper was sitting on my countertop.
Scale
Scale
【Product Size】95x100x19mm（3.74x3.94x0.74in）
SearchPean Tiny2S Scale
Bought during 11/11 sale even though it has some mixed reviews.
Had to use a box cutter to trim sides of the rubber pad on top so it would fit between the robot legs.
I like it so far, checks all the boxes. USB C rechargeable, quick push on the right side to tare and quick push on the left to start the timer. I don't use the auto modes for the timer, so I make a quick push to start the timer just before starting the shot.
This was my recipe adapted for the cafelat robot:
• Ratio 1:3 (18g : 54g)
• Kettle Temp 95°C
• Robot: Cold, not preheated at all
• Grind Size: Coarse (on my ZP6 I'm at about 2, on my K6 I'm in 40-50 clicks from burr lock)
• Ramp until pressure reads 1.5bar
• Stay there for a second until the puck is fully saturated (and there should be coffee already in the cup by this time)
• Ramp further but not over 4 bar until target yield
• Overall time ~15s +/-5
Archive
Archive
The pressure gauge is permanently fixed to the bracket and then to the female fitting on the back. A mesh filter is then placed between that and the Parker Legris elbow fitting on the back. The hydraulic connection to the piston is then made with a 4mm OD FDA approved Parker Legris flexible tube.
Pressure Gauge 0-160PSI 1/8 NPT (search for)
t adapter
Page updated
Google Sites
Report abuse