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Skywalker, the ALM chinese one pound roaster
HarryDog
Top  #176 Print Post
Posted on 03/25/2024 1:13 PM
I find mine in the same place, I have not found one stuck so far, but I have read others comments. I went back and watched that video and lots of the beans are riding on the face plate but wondering ,if some of this is caused by no screw holding the plexiglass in that corner?

The fins stop before the edge of the drum so I think they can ride in this area with less agitation.
 
Mike_Mathis
Top  #177 Print Post
Posted on 03/26/2024 9:20 AM
In the event, someone is interested in this roaster, but hasn't seen this.

Skywalker Version 2

https://www.youtu...umoYBLbmiU
Edited by Mike_Mathis on 03/26/2024 9:33 AM
*Kaffelogic Nano 7
*Skywalker V1
*2023 BC-2
 
Lostx403
Top  #178 Print Post
Posted on 03/26/2024 9:54 AM

Quote

Mike_Mathis wrote:

In the event, someone is interested in this roaster, but hasn't seen this.

Skywalker Version 2

https://www.youtu...umoYBLbmiU



All the folks waiting for the v2 will be disappointed it doesn't actually have out of box Artisan support, looks like they're just continuing to mirror/copy Kaleido for a more remedial dual system offering.
Edited by renatoa on 03/26/2024 12:18 PM
 
renatoa
Top  #179 Print Post
Posted on 03/26/2024 10:05 AM
Definitely they aren't with the soul into coffee roasting, just manufacturers.
I can't believe they still don't get the importance of real time RoR computing, display and plotting...
That graphical panel application is simply a resource waste... no DE/FC predictors, no RoR information AT ALL, nothing useful to drive a roast !!!
If Artisan connection will be there, nobody will use their panel. But will pay for a paperweight... as is the smoke filter too...
 
Mike_Mathis
Top  #180 Print Post
Posted on 03/26/2024 11:13 AM
To further confirm what renatoa states about just manufacturers, at the end of the video, the guy grabs a representative handful of beans and there is a burnt bean in the bunch. Like the Dark Side of the Moon (circa 1973)

Why would they not address this?
*Kaffelogic Nano 7
*Skywalker V1
*2023 BC-2
 
renatoa
Top  #181 Print Post
Posted on 03/26/2024 12:16 PM

Quote

Lostx403 wrote:

...looks like they're just continuing to mirror/copy Kaleido for a more remedial dual system offering.



I don't get the point about this continuous compare of skyw with whatever model of kaleido brand...
The heating model is significantly different for Kaleido, using a drum don't make them siblings...
 
Lostx403
Top  #182 Print Post
Posted on 03/26/2024 1:11 PM

Quote

renatoa wrote:

Quote

Lostx403 wrote:

...looks like they're just continuing to mirror/copy Kaleido for a more remedial dual system offering.



I don't get the point about this continuous compare of skyw with whatever model of kaleido brand...
The heating model is significantly different for Kaleido, using a drum don't make them siblings...

I'm not comparing the skywalker to the kaleido, I'm saying the skywalker is a knock-off of the kaleido.
 
renatoa
Top  #183 Print Post
Posted on 03/26/2024 3:21 PM
Sure, it roast coffee...
 
htmlbarist
Top  #184 Print Post
Posted on 03/27/2024 3:05 PM
The glass that covers the resistance exploded while it was cooling, do you know where I can get a replacement?
htmlbarist attached the following image:
imagen_de_whatsapp_2024-03-27_a_las_151756_4180a5ef.jpg
 
htmlbarist
Top  #185 Print Post
Posted on 03/27/2024 3:23 PM

Quote

Mike_Mathis wrote:

As of yesterday, I had roasted about 7 lbs on my Skywalker roaster. I decided to remove a ton of screws and do an inspection, just to see how it looked under the hood after some use. One thing that caught my attention was the condition of the heating element. i.imgur.com/FHvXH70.jpg This is what the top side of the element looked like. Obvious deterioration of the "glass" tube the carbon fiber coil sits in. Here is a pic of the other side. i.imgur.com/lluluoY.jpg The top picture doesn't look right to me so I contacted the iTOP store rep on eBay and after submitting the picture, they told me they would check with their engineer.

I did roast a 350g batch today with it and it appeared to do fine. Just strange that the shell of the element would do this. Maybe someone who knows more about these IR heating lamp/bulbs could shed some light on this. No pun intended.smoking


The one I have was quite similar and exploded this morning after the second roast of the day, while it was cooling.
htmlbarist attached the following images:
imagen_de_whatsapp_2024-03-27_a_las_151320_25a8d82f.jpg imagen_de_whatsapp_2024-03-27_a_las_151046_95f19e57.jpg
 
renatoa
Top  #186 Print Post
Posted on 03/27/2024 4:32 PM

Quote

htmlbarist wrote:

The glass that covers the resistance exploded while it was cooling, do you know where I can get a replacement?


https://www.ebay....6103977724

The question is ... what is the real service time of this roaster bulb ?
Replacing the lamp every few months is out of question... Shock
 
HarryDog
Top  #187 Print Post
Posted on 03/27/2024 5:55 PM
What is the wave length of this lamp? I think they make low (short), medium and long wave?
Do you think the ones with gold foil or ceramic coating will help to keep the top of the lamp from degrading so fast?

I want to try getting a better lamp if possible.
Edited by HarryDog on 03/27/2024 6:04 PM
 
renatoa
Top  #188 Print Post
Posted on 03/28/2024 3:32 AM
As I already wrote, carbon filament is much cooler than wolfram used in halogen lamps, 1200 vs 2000C degrees.

For this reason usage of quartz glass is mandatory in halogen lamps... maybe they used ordinary glass in these heaters.

If mine broke someday I would replace with a knockoff made DIY by coiling khantal/nichrome wire on a ceramic rod.
Similar to what you see in attached image.

Replacing with same model is a nonsense.
Definition of madness is to make over and over same mistake and expect different results.

~~~
renatoa attached the following image:
image_2024-03-28_104911634.png
Edited by renatoa on 03/28/2024 3:52 AM
 
renatoa
Top  #189 Print Post
Posted on 03/28/2024 3:38 AM
Wondering if the lamp original design isn't supposed to be in a minimal airflow... which is missing in preheat phase for this machine.

One more reason to preaheat using conditions as close as possible to those during the roasting process... i.e. max 75% heater and fan close to 65%, no less than 50%
 
HarryDog
Top  #190 Print Post
Posted on 03/28/2024 7:22 AM
Sorry, must have missed that post. I don't know if the manufacturer I was looking at is telling the truth but they claim to use world's leading quartz raw material and hydroxy of quartz tube is 1PPM,in this case, our lamps can work at a higher temp like 1000ºC.

Just didn't want to get off on the wrong foot by choosing the wrong wave length.
 
renatoa
Top  #191 Print Post
Posted on 03/28/2024 7:27 AM
If is NIR then it's ... Thursday Grin

800 to 2500 it's a great range, not sure how much it helps...
...
renatoa attached the following image:
image_2024-03-28_142645621.png
 
Mike_Mathis
Top  #192 Print Post
Posted on 03/28/2024 7:58 AM

Quote

One more reason to preaheat using conditions as close as possible to those during the roasting process... i.e. max 75% heater and fan close to 65%, no less than 50%


When you wrote several posts back, it made sense to me so I have been preheating at heat 50% and fan 50% since. When it gets around 185C, I start feathering heat and fan until it lines out where I want it. Works like a charm. We'll see how much longevity it affords the element.cross fingers
*Kaffelogic Nano 7
*Skywalker V1
*2023 BC-2
 
HarryDog
Top  #193 Print Post
Posted on 03/28/2024 9:07 AM
Rubasse claim wavelengths between 750 nm to 1500 nm is the sweet spot for penetrating grains. So short wave Carbon IR lamp would be the right one to look for then. Most suppliers show the short wave lamps as glass?

Wave length 0.75um to 1.5um. I seen one manufacturer show the ceramic coating on the outside, thinking this could protect the tube from coffee particulates sitting on the tube?
Edited by HarryDog on 03/28/2024 9:35 AM
 
renatoa
Top  #194 Print Post
Posted on 03/28/2024 10:16 AM
Actually... carbon lamps are at the longest wavelength side of NIR spectrum... at the boundary of MIR...
If you want short you should look for halogen
...
renatoa attached the following image:
image_2024-03-28_171613665.png
 
renatoa
Top  #195 Print Post
Posted on 03/28/2024 12:14 PM

Quote

HarryDog wrote:

Rubasse claim wavelengths between 750 nm to 1500 nm is the sweet spot for penetrating grains. So short wave Carbon IR lamp would be the right one to look for then. Most suppliers show the short wave lamps as glass?

Wave length 0.75um to 1.5um. I seen one manufacturer show the ceramic coating on the outside, thinking this could protect the tube from coffee particulates sitting on the tube?


Curious to hear where can you search for a replacement lamp having such broad range of restrictive criteria...
 
HarryDog
Top  #196 Print Post
Posted on 03/28/2024 12:40 PM
I was looking at this company.
https://quartzinf...-Lamp.html

https://quartzinf...chine.html

Do you think a Halogen at the same wattage is ok to replace it without causing more heat issues?
 
renatoa
Top  #197 Print Post
Posted on 03/29/2024 5:19 AM
Would ask them what is suitable for usage in still air, no venting at all.
Halogens lamps in a turbo oven looks as new, no stain on glass, after many years of roasting... but heavy airflow !
Increasing airflow in SkyW is risky, would change the radiation/convection balance, and even start experiencing eject of chaff on the back way, instead drop and rest in dedicated drawer.

Wavelength would be less important for me atm.
 
HarryDog
Top  #198 Print Post
Posted on 03/29/2024 6:52 AM
I will add the question, I need to decide on what I want to try first for wave length as that changes supplier maybe, I liked the coffee from my Toaster oven hot plate version if I just assist a bit with the plate but never tested the hot air version before winter hit as this unit is only used outside and this was a bad year for cold weather. TO is 20 years old and the bulb is fine even after roasting maybe 10 pounds of coffee. The Sky Walker does move chaff into the exhaust as I use 100% near the end of roasts.

Looking at the picture of the wavelength curves I wanted to try the fast response medium wave as that is in the middle? I think I only seen one or two suppliers post this version and I don't need 50 of them.

Going to pull my lamp and get all the measurements soon.

I emailed as a preliminary check to see what they say.
Edited by HarryDog on 03/29/2024 7:25 AM
 
Mike_Mathis
Top  #199 Print Post
Posted on 03/29/2024 7:42 AM

Quote

HarryDog wrote:

Going to pull my lamp and get all the measurements soon.


Unless you have plans to go into the roaster anyway, I have a spare lamp. I can get measurements for you. I have some honey-do stuff today, but I'm sure I can have numbers by this evening.
*Kaffelogic Nano 7
*Skywalker V1
*2023 BC-2
 
HarryDog
Top  #200 Print Post
Posted on 03/29/2024 8:32 AM
I grabbed them but you can confirm them.

Total Length: 211mm
Leads Length: 56cm
Element Heating Length: 135mm
Twin Tube Width: 23mm
Tube thickness: 11mm round


I think this is what they ask for with some manufacturers. The element length is kind of the middle coil length as one side is a bit shorter, should not be a big deal.

I should have taken a pic but my tube is a lot better then yours looked but still showing a few spots that I would not like to see. The silicone boot is showing some "slight" stiffness and the plastic is ok so far.
Edited by HarryDog on 03/29/2024 8:42 AM
 
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