<p>So I've switched the Trigorilla board in the printer with a SKR 1.3 with TMC2208 drivers and installed the latest Marlin 2.0, with a config based on <a href="https://www.thingiverse.com/thing:3741425/" rel="nofollow noreferrer">this one</a>. You can find the <a href="https://pastebin.com/ij1G5tSw" rel="nofollow noreferrer">Configuration.h here</a>, the only thing I changed in Configuration_adv.h was the pin of the hotend fan. </p>

<p>Now when let the printer autocalibrate the delta settings, it tells me that the height is 141.35&nbsp;mm, instead of the actual ~300&nbsp;mm and I had to set the radius to 78&nbsp;mm, instead of the actual 115&nbsp;mm so that it doesn't try to probe outside the bed.</p>

<p>What settings could I have set so horribly wrong that I get these results?</p>

[{'answer_id': 11089, 'author': 'cmm', 'author_id': 2082, 'author_profile': 'https://3dprinting.stackexchange.com/users/2082', 'pm_score': 2, 'selected': False, 'text': '<p>I would check the "steps per distance" setting.  If the motors were moving more than the firmware thinks, the height would measure as shorter than actual (since the number of steps would be less than the firmware expected).  Similarly, the radius would scale up.</p>\n\n<p>You replaced the controller and motor drivers, so perhaps the micro-stepping is different.</p>\n\n<p>If the result is inconsistently wrong, it could be a dynamics setting, such as acceleration or max velocity.</p>\n'}, {'answer_id': 11092, 'author': 'Metalfreak', 'author_id': 18664, 'author_profile': 'https://3dprinting.stackexchange.com/users/18664', 'pm_score': 3, 'selected': True, 'text': '<p>So the problem was that the TMC2208 were wired for UART mode, yet Marlin was configured for standalone, which apparently makes them work, but with completely wrong step sizes. Changing it in the configuration completely eliminated the problem</p>\n'}]
['https://3dprinting.stackexchange.com/questions/11084', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/18664/']