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Thread: Coretto killed my heatgun

  1. #1
    Senior Member Lyrebird's Avatar
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    Coretto killed my heatgun

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    So my heatgun (a Makita HG6500) just died in the middle of a roast: the LCD screen went blank and the heater coil went off so it looks like the control circuit has been fried.

    I've been slightly worried about the possibility of this since I started roasting: the air intake vents seem a little underwhelming and are easily clogged by flying chaff.

    I need candidates for a replacement: I also use the heatgun for heatshrink binding tape to compress CF composites so I need the variable temperature feature.

    I'm leaning towards the Dewalt 26414 but I'm wondering whether I should get a cheaper gun like the Ozito for the roaster: I avoid Ozito tools as they are always crap but if it's just going to clap out anyway, what's the damage?
    Last edited by Lyrebird; 25th June 2019 at 12:18 PM.

  2. #2
    Senior Member Yelta's Avatar
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    Bad luck Lyrebird.

    I've been using a Bosch 630 DCE as a Coretto heat source for 10 years, very controllable, 50 to 630C temp, 3 blower speeds its still going strong.

    I have a pedestal fan set up to blow chaff away from the air intakes and do brush the mesh regularly.

    Will replace it with same again when it does fail.

    https://www.bunnings.com.au/bosch-bl...t-gun_p0078009

  3. #3
    Senior Member Lyrebird's Avatar
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    OK, sounds like it will be worth a shot.

    BTW I brushed the vents before use but it never seemed enough. Obviously I was right.

    I might try to resurrect the guts of the Makita but institute an external controller to give me independent air flow and heat settings

  4. #4
    338
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    Lyrebird, I also use the same on the advice of the forum. Two years so far and the last year been using it in a device of my own making where the nozzle is inside the heat chamber. So far, so good. Mine is the PHG 630 DCE in green - https://www.bosch-do-it.com/au/en/di...446-199922.jsp - oozing Romanian quality.

  5. #5
    Mal Dimal's Avatar
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    I'd steer clear of the DeWalt units...
    Tried a couple of them out a few years ago; the first failed to maintain an output temperature above 400C so returned it, the replacement unit they sent me fared no better so ended up going with a Makita 6020 which was their top unit back then. Hasn't failed me in many years of use and is easy to clean. The air intakes on these units should have removable filters that one can clean easily but as far as I know, the Metabo units are the only ones that provide for this.

    Lots of CSers here using the Bosch options with very, very few failures that I can recall...

    Mal.

  6. #6
    Senior Member magnafunk's Avatar
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    My Bosch went well for hundreds of roasts before it clapped out. Turned out to be a dry joint which I soldered up. It did another few dozen before going into storage. Would definitely recommend. I'm using a behmor at the moment but when I go back to corretto, I'll use the Bosch until it dies then I'll get another
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  7. #7
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    I'm also a fan of the Bosch 630 unit. Mines been going for 4 years in which time I've done about 700 roasts with it. The Ozito i had prior only lasted about 9 months and about 80 roasts.
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  8. #8
    Senior Member Lyrebird's Avatar
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    Thanks all, I pulled the pin and bought the Bosch unit on my way into Melbourne this evening. Will try it out when I return.
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  9. #9
    Senior Member Yelta's Avatar
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    Quote Originally Posted by Lyrebird View Post
    Thanks all, I pulled the pin and bought the Bosch unit on my way into Melbourne this evening. Will try it out when I return.
    Hope it meets your expectations Lyrebird, keep us informed.

  10. #10
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    With a chimney to direct chaff out the door you can avoid clogging up the air intakes in the heat gun.

  11. #11
    Senior Member Lyrebird's Avatar
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    Quote Originally Posted by Dimal View Post
    The air intakes on these units should have removable filters that one can clean easily but as far as I know, the Metabo units are the only ones that provide for this.
    Excellent advice, Mal. A velcro dot and a strip of breather cloth* later, we have this:




    The intention being to avoid a repeat of this:




    No wonder the poor thing died, it couldn't breathe.



    *Breather cloth is used in vacuum bagging composites to ensure you can get all the air out. It's basically non woven polyester batting.
    Last edited by Lyrebird; 30th June 2019 at 12:32 PM.
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  12. #12
    Mal Dimal's Avatar
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    Behmor Coffee Roaster
    Worst case of "Chaff Aspiratus" I've ever seen...

    Mal.



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