Across International

[Sunfire]

Oh ricky, seriously, comforting words mate, thank you. I thought for sure people were going just be like the kid off the Simpsons and say "ha ha"!

Well crisis averted, thank god. I was going to just erase that last post but ricky beat me to it plus I feel like there's a lesson in there about where to put your digital gauge. Lets start there, you can't have the gauge on a dead end line, especially on the other side of the pump from the system your trying to vacuum. That was giving me way falsely low readings.

Luckily I have two pumps so I started there, both fine, went through everything fitting by fitting until I got to the pipe thread inside the oven. Like an idiot I was checking it piece by piece under vacuum testing one section, then the next, then the next. Then I realized I could just use pressure and soapy water, duh!

Holy fucken china wtf! The pipe thread instantly blew out the tape and was blowing bubbles everywhere. I took them apart and cleaned off the tape. When I put the unions into the elbow dry, you could straight wiggle the shit back and forth, wtf! So I put the first one on with five wraps and it wasn't as snug as I wanted but I wrenched it down super tight. The next one I put 7 wraps on and I was still able to wrench it all the way down to the nut/hexagon part, holy cow! Luckily the valve seemed to be a much better fit. I did just 2 wraps and didn't like it so it took it off and then did 4 and it felt much better.

I was pissed so I pulled that bitch down to 1000 microns and it didn't seem to take long at all. Turned off pump iso valve and she held, didn't even jump up initially like it does on the cls. When I closed the valve however I was getting a tiny leak. The valve and the other side of it idk if I can pressure test cause the door might blow open. I feel it's not leaking on the oven side of the valve though cause judging by the crazy leak before, the analog gauge would have shown something after the 4 hours I let it sit and it didn't move a hair.

These analog gauges still suck! Even at 1000 micron it won't go past -29hg. I'm for sure calling HFS tomorrow!

All things aside though, the heat in the oven seems very even and accurate! I think the full size 16x14 1/4" aluminum shelves I had made are helping with that!

Only other complaint is that some of the shelve brackets arnt level. Some product slid off the parchment and is dripping down, damn it! I'll work on that tomorrow, looks like I can adjust them. Attached is the pic of the culprit post fixing.

Sorry if that last post was super crazy, was a terrible day, so much shit went wrong and other projects are not doing well and I'm involved in some local county politics that are stressful and shit is just getting crazy for me right now.

 

[Sunfire]

Oh yeah, I did the burn off according to manufacturer specs. 400F for 1 hour, no warping on the inside of the cabinet, yay! And I feel like the door seal Is solid and holding, plus you can adjust these for that if needed.

 

[NorPene Solutions]

Unfortunately all Chinese manufacturers are not created equal, sometimes it is hard to separate the sub par from the quality companies. You really need to use due diligence. There are some terrific companies out there but you have to find them!

We researched dozens of companies and whittled them down to 2 before choosing our supplier. The better quality products were priced accordingly. Most of the Vac Oven companies contacted were offering ovens for half the price of the higher quality units. You really get what you pay for when buying from China. If you are only buying according to price spreads and looking for the cheapest deal you can find, you most assuredly will run into quality control issues. There are some fine Chinese companies with good products and good customer service, but you must wade through all the crap to find them. Keda ovens were some of the cheapest ones of all that we came across, quality was suspect, so we steered clear of them. There are many, many vac oven manufacturers to choose from in China.

 

[humboldt123]

big agree... i put my temp at 125, leave the oil in for an hour, pull it out real fast- laser temp says 106. a bit wtf.

Have you calibrated your A.I. oven? I ALWAYS calibrate my ovens before they get any action!

 

[humboldt123]

As well as A.I.'s 3.2 cf. model

 

[Sunfire]

The keda ones are kinda cool for auto tune style you set your you desired temp, then turn off, pull vacuum, and turn back on, and that's it. It does a little auto start up test and adjust.

 

[Twitch.]

my question is how is the customer support with the china ones? I can get AI on the phone pretty easy and have had them on the phone walking me through stuff.

 

[Sunfire]

I think you just contact HFS or hydrion. I've had no problems getting questions answered.

 

[Urbngroz]

What type of vac pumps are people using for the 1.9s. I have a CPS VP6S vac pump Im using for my MkIV. Its 6cfm, single stage with a filterless exhaust. Would this work with a 1.9?

 

[Sunfire]

That's more than enough for a 1.9. You could easily employ a cheap 100$ with the warranty 1.5 cfm for a 1.9 as you don't really need it to vac down quick while spools are thawing out.

 

[Urbngroz]

I got the pump because I picked up a tr-21 for recovery and wanted to keep with the same manufacturer. Besides the cheapo one at HF was about $129 and I picked up the VP6S for $150 online. Figured it was worth it for the quality. Ill use it for both as you suggest.

 

[rubberducky]

I have 4x 1/2" granite tiles in one oven, and 4x 1/2" marble tiles in the my other oven. All from Lowes, they can cut tile there for you. Each tile must have only been about 3-5$. But I only have the smaller .9cf AI's, so I dunno if they carry larger tiles that will fit in bigger ovens.

I have noticed that the marble seems to hold more of an even temp. Although, both of them are up to (+~-) 5° hotter towards the back of the ovens.


I've been keeping an eye out for aluminum sheets, can anyone suggest a place I can have them cut to size?

whats the most product u think you can purge in ur .9 model?

 

[Hydrosun]

Depends on number of shelves and slab density.

 

[Gray Wolf]

What type of vac pumps are people using for the 1.9s. I have a CPS VP6S vac pump Im using for my MkIV. Its 6cfm, single stage with a filterless exhaust. Would this work with a 1.9?

Yup.

 

[Gray Wolf]

whats the most product u think you can purge in ur .9 model?

If your goal is artisan slabs, you need to be able to observe what is happening over its surface.

That is more of a limitation than actual space.

 

[Urbngroz]

Yup.

Thanks for the answer GW I was hoping you would chime in. I picked up the pump after I read about you using it as well, plus I have a TR 21 and wanted to keep the same brand in pumps. By the way I was worried when you said they made a new model weaker than the old models but it pulls the mkIV down to -29hg in about 5 mins. Not sure if that's fast but seems ok to me.

 

[Dab Strudel]

1.9 owners, is it me or does the 1.9 lose 2-4*f every time you open the door, even if the door was open for less than 3 seconds. I mean, I know I dont have all my shelves but the 2.3 Elite didnt lose more than a degree, maaaaaybe 2, at a time unless I had the door open 3-4 times.

EVEN SO! When it heats back up the 1.9 does one of two things, either acts like i didnt open the door (i.e heat kicks on and off for durations as if the door had not been open) until it gets 4*f under target temp then sky rockets to 2-3*f higher than target temp and gently comes back down. The 2.3E fights its way back up gradually and locks at the target temp, maybe a half a degree over, but certainly not 2*f. Did my auto tune mess up? It took a few hours to finish. I set the temp I wanted to be at, pulled a full vac, then when target temp was reached and i got full vac I started the auto tune, per AI's direction. Questions? Comments? Answers?! Ty in advance

Is this common

 

[Sunfire]

I bet the difference is a mercurial head thermometer and a thermocouple pyrometer. The regular 1.9 is low grade and the elite is high grade.

Pretty much an analog sending unit with a digital gauge and a digital sending unit with a digital gauge.

The manual of my 1.9 talks about the mercurial head thermometer and it's lag time relating to overshooting, and how to adjust it and all that good stuff.

I just learned to live with it and I can trick it if I want to bump the temp up or try to cool it down. It's just a slow read and feedback so you have to account for that. I don't think it's too big of a deal to have a few degree over shoot for like 10-20 minutes but I'm not an artisan so idk really.

 

[Rickys bong]

1.9 owners, is it me or does the 1.9 lose 2-4*f every time you open the door

The reason for the temp drop is the fact you are introducing a heat conducting fluid into the oven. When it's closed under vacuum the only heat loss is by the walls and door radiating heat.
Once you open the door atmosphere flows in and draws heat away.

Another reason is the placement of the thermocouple. I think the smaller ovens have it placed further from the walls and thus don't receive as much radiated heat from the walls. It is somewhat isolated thermally from the heated walls so it gets cooled quickly once the door is opened.
How does an IR gun compare to the oven reading?

On the odd temp behavior, sounds like something wrong with the tuning. Download the manual for the temperature controller and see if there is a reset to default. Other than that re try the autotune.

RB

 

[steeda304]

no mention of agetation???

no mention of agetation???

I read 8 pages of this post, no one mentioned that shatter comes from non agatated oil. If you scrape then scrape razor, then scrape again etc, you get butter. If you blast into Pyrex let it purge to a point where it's sludge, then with a flexible spatula scrape corners and whole pan with as few smooth strokes as possible. Then let gravity run the oil from spatula to parchment , you can guide it with a razor. Once it is on parchment let it sit in oven for 30 before pulling vac. I start at 95deg Fahrenheit, and each flip I go up 1degree. After flip let sit for 20-30 before vac again. After a few days I usually end up with solid shatter. If warmed up a bit it can be flexible...no idea why pics won't post but hopefully this helps a few people...yes I don't have many posts on here...but that's cuz I really don't care to have one more thing to keep up with.