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Thread: Killed my Ryobi Variable temp heat gun

  1. #1
    Senior Member ozscott's Avatar
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    Killed my Ryobi Variable temp heat gun

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Well in an effort to keep the temp more constant and a high rate of climb right up to the FC I took out the glass from the BM lid and stuck the heat gun in...got it a bit low on a recent batch and cooked the gun...distorted the end part of the case a little - but not too bad, but it cut out at the FC...let it cool for a week and went to go and start a new batch and no go. Took off the cover - lots of fine dust and chaff in the gun. Blew that out with compressed air and stuck the nozzle down the throat of the gun...all this very fine glass like stuff came out! heaps of it..does anyone know what that would be? Anyway case back on still dead as a doornail. So im off to get another gun, but this time I will be going back to the old way of lid open roasting lesson learned.

    I will go a 2 speed non variable this time and just raise and lower to remove a variable of roasting.

    Cheers

  2. #2
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    suppose I should get with the plan and use a fan too to give the old heat gun a nicer (and longer!) life

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    Re: Killed my Ryobi Variable temp heat gun

    Hi ozscott,

    We used compressed air to blow the chaff out of our Ryobi (non-variable = cheaper) heatgun. We also saw the weird stuff flying out of it when we dared blow air up the nozzle (it was cold, at the time...). I didnt get a good look at it, but Id describe it as being more like flakes of metal than "glassy". We got a bit freaked out and stopped using compressed air up the nozzle straight away...

    Were planning on making some sort of chaff cover for the HG soon.

    Pity about your HG. I guess the hot air coming up from the BM was concentrated onto it?

    Cheers
    Stuart.

  4. #4
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    ....yep thats the stuff - I just got a 2000W Makita so Im in Heat Gun Heaven at the moment.

    Cheers

  5. #5
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    Ok - got serious with a 2000w Makita thermocouple controlled Heat Gun and a 30cm desk fan. Just did back to back 700gram roasts in the BM and it went like a champion - the plastic around the snozzle was barely warm at the lowest position in the BM and highest heat. Its quieter than the Ryobi and easier to control the heat output and the roast has no burned beans (the Ryobi used to burn a few) - I think thats down to the fact that you cannot see the heating element in the end compared to the R where you could. The M doesnt glow onto the beans like the R did. Interesting. It apparently has a ceramic covering over the element to give it a longer life (Im all for that). I got it for $128 so Im hoping that, as with most Makita gear, it will last well.

    Cheers for now

  6. #6
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    Re: Killed my Ryobi Variable temp heat gun

    Good stuff Ozscott, I just recently bought a new bosch digital heatgun after killing my ryobi varible heatgun.I think for the demand we put on the heatguns sometimes it pays to get a good one.

  7. #7
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    Hi Marty - yep thats a good gun too I reckon. I ummed and arrhed over which - that one or Makita. In the end I wasnt sure about the Bosch high end jobbie because on the box it had a diagram of the gun shutting down heat if it gets too close to an object (and the instructions didnt add to that in detail), so I was concerned that heat bouncing back from the bean mass might shut it off and just leave the fan on! I am keen to hear how you go with yours because its a neat gun with digital control.

    Cheers

  8. #8
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    Re: Killed my Ryobi Variable temp heat gun

    Ozscott, Ive had the thermocouple Makita for 8 months or so now and its going great. I was a bit worried early on - I had it a bit too low in the bm and the plastic has distorted at the end, but no problems since then. You quickly get used to adjusting the thumbwheel, and while it doesnt show the exact temperature, the markings make it easy to remember comparative heat settings.

  9. #9
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    Cheers Viviane - it seems like a nice bit of kit. I think that the Ryobi would have lasted a lot longer if I had a fan blowing on it, but the Makita is a step up in terms of roast quality.

    Cheers

  10. #10
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    Re: Killed my Ryobi Variable temp heat gun

    Ozscott the tempreture does cut out automatically if it gets to close to the corretto basket, but if I have the fan blowing the chaff away it wont do it. But youre right to be worried it might cut out, when it happened to me the first time I did a lot of swearing.

    Here is a link to view a short video http://s225.photobucket.com/albums/dd10/martybean/roasting/?action=view&current=V060708_1548.flv

  11. #11
    Mal Dimal's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    Quote Originally Posted by stuartgrant link=1215392233/0#2 date=1215400408
    We used compressed air to blow the chaff out of our Ryobi (non-variable = cheaper) heatgun. We also saw the weird stuff flying out of it when we dared blow air up the nozzle (it was cold, at the time...). I didnt get a good look at it, but Id describe it as being more like flakes of metal than "glassy". We got a bit freaked out and stopped using compressed air up the nozzle straight away...
    Hi guys,

    That "flaky stuff" you can see when blowing through the heatgun with compressed air, is Mica. Its used as an insulator and support for the heating element(s) and does NOT like to be stressed :o in this way. If you feel the need to clean the heatgun out, far better to dismantle and just blow out around the electronics and air intake area with low pressure air. Better yet, use a vacuum and a 25mm paint-brush ;).

    Those Makita HGs are really designed to take it so Im sure theyll provide long and reliable service. Interesting that they use a t/c for feedback control, havent heard of that being done before in a heatgun.

    All the best :),
    Mal.

  12. #12
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    Re: Killed my Ryobi Variable temp heat gun

    Ahem... ooops.

  13. #13
    Senior Member ozscott's Avatar
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    Re: Killed my Ryobi Variable temp heat gun

    Thanks Mal - yep I have never heard of it before either in a HG....ditto the oops about the compressed air!

    Cheers

  14. #14
    Senior Member ozscott's Avatar
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    I just killed this gun - fan is loud and not blowing much air. I could have sworn it was only 2-3 years old...how time flies. Over 5 years from a gun doing 1kg of coffee per week is very good. I have a dilema...I like the Bosch units, but I think I might have to spring for a Makita with LCD.

    Cheers

    PS. The top of the line Bosch is advertised on their site under the professional tool range with 2300w versus the Makita 2000w...its only got a one year guarantee versus the Bosch 630 with 2 years - perhaps they know that the 660 will be trade use...I note that Tradetools only sell the GHG660 and not the 630...

  15. #15
    Life-long Learner DesigningByCoffee's Avatar
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    Hi Ozscott
    Don't think you'd go wrong with either. I've got the Bosch 630 - temp control is amazingly precise. But I'm sure the Makita would do a great job too
    Matt

  16. #16
    Senior Member ozscott's Avatar
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    Many thanks mate. I have used tbe 630 and was impressed. The 630 is 70 skins cheaper too.

    Cheers

  17. #17
    Senior Member ozscott's Avatar
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    First roast with fire blanket around pan and lid on...turned out well but steep learning curve with the new gun to get a smooth climb rate.

    Cheers

  18. #18
    Life-long Learner DesigningByCoffee's Avatar
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    It is a bit of a change - the insulated + lid especially
    FWIW with my Bosch gun I've found an increase of 50 at 100 (DMM), 130 & 160 on a 700g batch gives a nice ramp to first crack. Then I just adjust the start temp to suit ambient…

    Good luck!
    Matt

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    Behmor Coffee Roaster
    Yes, for me it took quite a few roasts to get it right. No secrets really. Just practice.



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