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Do I need supports to prevent this poor bridging? And how to speed up print?


pleonard2000
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Posted · Do I need supports to prevent this poor bridging? And how to speed up print?

Hello,

 

I am just getting started with 3d printing so I'm not sure if bridging/drooping is the correct term.

 

Here's the finished part;

4ly1pI9CkQLKL1Vikwf6E-fhd__jjiJa-aN482EB2rJ2C3mW12hlY743mV4UqnQ7pZtx_GZzwv6XAxKHE63gBIgkgK7uqod3IhZZA05d-k9RVxSO4O6JMmkWct2JJe3_N8I8fZGnHOx4Jsb9_X8Czlc1L7zsiv4ESYsX9rq39M7rg9sjrFnmUfuUPjjFWWwI_oOzcX_TOxF_D-ndm3h7bCiveq_xitibmZ1dNmn5jki3nmBdqREYzNhtF1o0bHJieHdEkdRcpzaM_f15keW_BteFC87r3G9d1rK85ULpsq2tiYyOjSCNtaQT_VZ67U359q5rEuJJxkw0RpZajE6ZQxuV4KGiGOtz6pDe-Wxfcgd-Ub5ut5fKzQCFLNhMuU_gAbCrup3JHwKNDKLI1ZWuj0XGHaHBTIlJIvbVHqCDLnf5a7enqarx1ojMoXuirnJgzyPy0TwJ38Oc7nEwuc3pnxdp7m9_uYc94y-zL1SX_8NMTZ_TfZ6cPSJnoj0rWrcqO39v21EvLsQ-cWWn_hyNfBISRGQ5DTxBPhajtA-UV5RVYXw5GORL8husIbmM1YuaRk0a9o8-TQ7AUd4hvVQbtUp4ubJhHFDOmR2CSOjLB_7I1rYTe-MQAusNf1YTwBtBcRvzyHDz9DG1GB7_tt_xlEPuX2EgQobrb0a1eChKtstGvFJGDsYBzFLV_ebbmg=w501-h377-no?authuser=0

 

I used 1.75mm PLA+ at 210 deg with print speed of 50 mm/s and low quality .28mm layers

The cross pieces in the graphic are 1.6mm thick, and required about 5 layers.

 

It was printed without supports in this layout;

rGQT-XFzbEB9wuJ4x7m7qLMYDdWDynvu58un4iRcqrspieYcSpQcyhNYuP1F3dtsPPRhhF8VsEtfKBkQGea65R5ji46_rHaVJ3R6Sl57Fz5dKDtN0G6KZq75f9ucr1-AOhvU_MICLmebJDeiuzaMst03CKN8cd6Aj7snnZd0X0rUuUcx0Ee_oKX63YB7Vo0V-gB0PpT2SJqDk_rvFt52FHnJ5JV6T9YAvA-fbQ6ljqlNLrjYnkY4Qq2BD-3xnFrjf1MSS7mX1zIEjgIWg5tNYYZuxuDfsaKSSWKNs70Pbkb-urmRvkJYkd2tPp43kHzBFB93QXncyiXaRqmgSa1BY5Xti1d9vFKSFAk6k7Wo2becmrKhsQq1o1hhgqUnKxvvb-GsFJV-_cg1ldLp58ENDjO2LYHe_cv-pR1Y9Zrfyt2gfFdY5H83Nbi4JFHC_0-ZL4ae10VAd0C91U3VugNdmyv90cgyzWIb1j3RYXsP5x2qAQ7J9LYG_tWkhh49p8sWaRx8zptlr2NbstGIQTcabwPMATNDCN30AdjxYMgjyUNKQJe73qGPeZGZp7pixJS5drrrvOA1XHCRl17h2pHVp0hH49-4tglP_JKCS-OEkPfwtQsGHOpEuta8xDKwncGn1NB-HZJ8rdmcBdvTCDnQYq6ZbYfgVgEHdRqxG3i3P0l2dsEOQvpaKI27D9akrw=w557-h314-no?authuser=0

 

 

Here you can see the drooping that occurred on the underside of a couple of the bridges

 

mdX-_yJYjmGLkwrYILBYfj0GhVO7IelWJGPgB7so2RjmkvoUJVWZBeDE_IkadPd4oUKqOCyRMgWXJW1dRQFZFK2B-cQZHibhhljM23QULce4jtKmrIL8bylseM8pS8v5fcuenvHL9jtiSvT0gsepqdeW8F0_oUAfRBnZMNG5fbuQ-fmlDGBXDMCkETXLcmaBxQw0EOW1wSvSlQwndekhHQk_UiM9mINnMLAHn6dZAlRzDhsNVALwcB-toPTwLTWYOQjZMxBcaBO4B5YWLq5ARJn1aJ2wB_uDMwJZTtSzIHfmzm7u8HzCSzaTL-CQ8A0a_Sm4Vui8Bdc_pB9UPCm2uTOHEQ1E6cnPr2iE-Jm9Nq7lLIBmpj8UXgrdKMdIjcRseWlRDlkbO38Qw5Y1MjNiYWKVMxmtXLPZjYkDua28cH9xrxELAoAKiLQEMkYgkZ4A4TdPJ_Kjal3i6aDqYdd_3ChTa2nt1oyW0bgkjdieGp5gZReC9vAAf5R0wu9cydnZ0TmOmIKDib_fe6vEs6MrvKmd_HnjDSDQ4hEfQfQz6lDWW2F0zZOYjShLtLTeNFKDnBdlbsKj2Kgjjn24umFPPDuVmS-1-jC3Z6djQpn2iOee2E0DP2nsxzKkFgj3iXZr60aBqOHIngHs7VKDCHKjoEDIDvftxZcrD0psbjLSj2y5zhpEA3nu5Iiw13lTaQ=w557-h314-no?authuser=0

 

So ... is this 'drooping'?

Should I have simply added supports to prevent this?

 

I previewed what the supports would look like, and not only did it seriously lengthen the time required to print, but they looked like they might be hard to remove.

 

I re-sliced it in highest quality mode, and the profile still looked similar so I didn't reprint it

 

NT1h1EdSIn9zz7td78zwbkXOHWKU54ADBWyIaRAnnvdBIJDYA6JUhaOhSJA4PJ6ITH6Y6LuVdjHDJ4zNWcJ4Hiy3t7rcLGoj_9CkBAYj_BLgGJzwoEtk34FtuhZcvACPmts9OtF1N8Ep7pa5WuEZgeZeHygPYsB29thStPytzTbTHr0c4RDu0_-AnmK59UhEF_GWMcFLWzxDbe1g83ZDb60ov3lCYtH2_u-3A7CDgwPoytVjkmYc9HsvVuffdgeiBGRJcUecjNKAFcz2sW8VjkqzPbXkS6Xcq1NQv9G_5Gwwmeh8PUj8TL8DhN5nQsMWeIRt7pwfjPhfNGRmL0AePZ94mJqyu8J-5DCPQGg3TNGY3kV52yE4GDtz1D9QziOSkOtI3VbesjipEYMbP03QBpK_lwj1xJ3bDqCYvLeSBsTMkAScKoGcrkK-Bhc0ZNA1yXsndeXQ_3olVDkXB-NV5-i2cKPGBqyMRn_ZRNw6Lugb7ZMV5D4bMioQww3--QJDZou-uNnLwSRxEy07oyWaYMAEQpjmPndCczDSwNxyYDwkc9C1UPtErDNtecwCbvoM6KLefXhtZuRWFXvvch1dBXJko1pnugXvvknH-Lcz5_oioimSZgzZEWLpVoAZulQ24MgfxyQuFNx9eW19f_UIgHA0s5-yx_o2ZZpe7tx1vx7jkaZzCN-8bQO0cY0Jtg=w557-h419-no?authuser=0

 

 

So, I'd like to know the proper way to prevent this, and also whether you have any tips to speed up the print.

It took almost 4 hours at lowest quality and only 10% infill.

 

Thanks!

 

Having a great time so far!

 

 

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