<p>I just received my Wanhao Duplicator i3 PLUS. Everything prints and functions fine via SD card and the display but when connecting to my Mac computer the printer seems to restart.</p>

<ul>
<li>Baud Rate: 115200</li>
<li>Serial Port: <code>/dev/tty.wchusbserial1420</code></li>
</ul>

<p>Any ideas what it could be?</p>

[{'answer_id': 1589, 'author': 'Lars Pötter', 'author_id': 204, 'author_profile': 'https://3dprinting.stackexchange.com/users/204', 'pm_score': 3, 'selected': True, 'text': "<p>I don't know that printer. But Arduino has a feature that a USB connection causes a reset. The Idea is that this helps when doing software update as the Arduino Boot loader will be active for one second after that reset.</p>\n\n<p>This can be disabled, but needs hardware modification.</p>\n"}, {'answer_id': 1591, 'author': 'ftobler', 'author_id': 2756, 'author_profile': 'https://3dprinting.stackexchange.com/users/2756', 'pm_score': 1, 'selected': False, 'text': '<p>That is normal on most printers. They restart if you connect.</p>\n\n<p>As you have an SD card slot I would recommend using it rather than your computer. If your connected computer goes to sleep it would also reset the connection after wakeup.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/1588', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/2755/']