<p><img src="https://cdn.shopify.com/s/files/1/0046/3781/8929/files/CR-10-Max-_2.gif" alt="Sensor" /></p>
<p><a href="https://i.stack.imgur.com/9fDW1.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9fDW1.jpg" alt="enter image description here" /></a>
I'm just finishing the set-up of a CR-10 Max. It is a new printer.</p>
<p>I don't manage to feed the filament through the material shortage sensor.</p>
<p>I can hear the micro switch click; the LED turns blue, then a few millimeters after that (33 mm total from the entry point), there is something that prevents the filament from going forward. I don't see any switch on the outside of the sensor, and I applied a reasonable amount of force on the filament.</p>
<p>Can you tell me how to troubleshoot this ?</p>

[{'answer_id': 14045, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 2, 'selected': True, 'text': "<p>I've designed similar sensor casings, sometimes the filament catches a ridge/ledge or part of the cavity, even when it is chamfered or rounded. The arm of the limit switch pushes the filament up, away from the filament straight path.</p>\n<p>Have you tried cutting the filament under a very sharp angle, that may work.</p>\n"}, {'answer_id': 18349, 'author': 'alecail', 'author_id': 18571, 'author_profile': 'https://3dprinting.stackexchange.com/users/18571', 'pm_score': 0, 'selected': False, 'text': '<p>Here is 3D model that better explains why it was catching and how to remedy the problem:</p>\n<p><a href="https://i.stack.imgur.com/ooe48.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ooe48.png" alt="enter image description here" /></a></p>\n<p><a href="https://i.stack.imgur.com/dTy92.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dTy92.png" alt="enter image description here" /></a></p>\n<p><a href="https://i.stack.imgur.com/m4Y91.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m4Y91.png" alt="enter image description here" /></a></p>\n<p><a href="https://i.stack.imgur.com/Pv4Op.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Pv4Op.png" alt="enter image description here" /></a></p>\n<p>The filament is likely to have some twists and the bevel you create may not be in the correct orientation once it catches the ridge.</p>\n<p>The out hole is not chamfered on the inside, as it is drilled from the outside, and I guess a chamfer on the inside is not available at this price range.</p>\n<p>I found that twisting the filament 90° at most one way or the other always helps the filament finds its way. It can be tricky because of the small diameter/stiffness of the filament, with the spool still attached to the other end.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/14040', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/18571/']