![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmNKImMkIw5bqWmwjVfO9PKbKnsSYrnJESZMiPeczA1m7hDudqqN9uagj3mr9Gb2evVDp2QC7RFX8k-fqQ20Hl4miUq_Yhe-g_dTruP_x3KG2MBmig6qDZPw5vADsJ62vFSCAWOYFUVQa_/s320/IMG_4723.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3q_8RLU95wiyBAfG4KugYtpdaslGpvgUdfeXlGf97voRBemyrVxKlUuEcu0ZTdvEFcQyM5xVlQZt6V6VBMSh9rHKj5A9OHWT1Oz5An-Na1hnw3EO2nuV7vviGjB_SoeFeQKP7QmLsFoHZ/s320/IMG_4724.jpg)
The big drawback of the hot air popper for a coffee roaster is the limit on the amount of beans you can roast at once. I rigged up a larger capacity roaster as seen in the pics below. It is essentially the pan and drive of a bread machine, an exhaust vent to take care of the chaff, a heat gun to provide the heat, a thermocouple and temperature controller to run the show. Results were good; consistent roast; no user intervention required.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgG7rJZ5Eh0BIGm81gG6WMzEdpIbYH0aPfD6XrXkCoTWS85zacmK4tLm3DLybnmGxtBmw3LjP_Zkuqz128rGqdEtpSYCTAU0w1ji_RAgwdU2in_NSnRcyE1SJtUnKxVfC0SiqVoAPrhkEb2/s320/IMG_4742.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjheiLex0hYGd0hT2tRbu-sKMaOD0_mRoFIWJmdvTSGesmJLmxCOAP20hhSULhF8eIDxiQus3ifdiAS2MpmA74MpYqaNkrotxM9yqLgwbWOgE5L_cqHITwkpnecj0eALxh1-ahMfCsldSoe/s320/IMG_4737.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_FCxUeQinM4bR0ANPmLV-eOk7GEHjrIUULDA3saTU-xTYG4B9qmB0KJQ2r7v_3OlW8UAHfE5pKtvflQv99-0EKDfn9K4_Zy6jS__5EjXecpJ4YtNKEZ8b-pSYOfHBihTZbWimAkQnzz7M/s320/IMG_4731.jpg)
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