Troubleshooting Burnt Glue in the Edgebander

      Glue selection, heating element performance, and temperature settings all come up for discussion when an edgebander seems to have a burnt glue problem. December 27, 2010

I recently cleaned my gluepot and am already getting burnt glue in the pot and bits of char on the glue roller. Machine is a Brandt KD55 and the glue is Jowat 288-60 natural. Gluepot is set within range of what's recommended for the glue. What am I doing wrong?

Forum Responses
(Cabinetmaking Forum)
From contributor P:
I'm not as familiar with the Brandt KD55 as I am some, but the principles are the same with any system when working with hotmelt. Pots have heating elements positioned in the best location to disperse heat evenly. When an element burns out, it requires the other elements to work overtime to keep up. When an element stays on additional time to bring the glue up to temperature or maintain the proper temperature, it causes a very concentrated hot spot from working overtime. The hotmelt glue that is touching this hot spot is easily charred or oxidized.

You can check your elements by using an ohm meter. Disconnect the pot plug and you will see 2 rows of pins. The manual should give you the number of the pin position that each element is connected to and it should explain how to ohm your elements to check for a defective one. This may not be the problem, but if the elements are not working properly, it will cause added glue burn.

From the original questioner:
Thanks very much for taking the time to post that. I just replaced all 5 heaters in the gluepot when I cleaned it.

From contributor A:
We recently changed from the same glue you are using to Dorus and have seen a dramatic reduction in charred glue in the pot. We were told that the Jowat glue had more filler in it and that was what charred. The Dorus is almost twice the price, but has been worth it for keeping the pot cleaner longer.

From contributor C:
We once changed to Dorus because it was supposed to be better. It was hell - we went right back to Jowat. I was told Dorus was an excellent glue but not recommended for my machine.

Recently we changed to Wilsonart contact adhesive and had great results. We went back to the Conbond and have had hell to pay with the Binks gun. Anyone have a problem shooting a Binks 2001 and Conbond 2325?

From contributor N:
I bought a used KD54 a few years ago and had to clean the glue pot when I received it since all the glue was burnt and charred. The previous owner even sent a small portion of glue pellets to get me started. They were Jowat. I cleaned the pot and also bought a temperature gauge to see if the glue temp was the same as the digital display. Turns out the temp of the glue in the pot didn't correspond to the temp on the display. He was running it much hotter than the recommended 190-200 degrees Celsius. I adjusted the temp and used Dorus pellets and haven't had any problems. Do the two different glues perform differently? Not sure since mine was running too hot when I received it. All I know is that after adjusting the temp and using Dorus in a KD54 it works great. First, I'd check the temp of your glue pot and adjust if necessary. If that doesn't work, try Dorus.

From the original questioner:
I checked the temps yesterday (190 at the pot and around 176 at the roller). I'll give the Dorus glue a shot. Thanks very much for the feedback.

From contributor I:
Just changed to Dorus 351 transparent, and it's working perfectly in my KD-56 - much less charring than with my previous filled hotmelts. Keeping the gluepot topped off helps too.

Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?

Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Cabinetmaking

  • KnowledgeBase: Cabinetmaking: General

    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.

    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2020 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB

  • WOODWEB - the leading resource for professional woodworkers

      Home » Knowledge Base » Knowledge Base Article