#  Step 4: Preventing Air Channels from Being Blocked 

 



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 In **Step 5**, the base (thin layer) containing conductive material) and the main body was integrated together by placing the main body on the base and letting both cure. However, during this process, there is a danger of the air channels being blocked by the material of the base since it is still fluid and can flow into the channels. In order to prevent this, laser cut pieces were placed in the air channel before proceeding on to **Step 5**.

   ![prevent air channel being blocked](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/18944807_466216300391810_1951786830_n.jpg?itok=dxxaHIOr) 

 

 We used the same tools as in **Step 2**, under the subtitle, **Laser Cutting the Braces**, which are the CoreIDRAW X5, to sketch out the top view of the sticks and the Epilog Laser mini, to laser cut the 2 mm thick PMMA into four 9'X0.079' sticks. Each stick was placed in the air channel of each finger as in the image above.