I merged your other post into this thread, since they are about the same issue.
Can you provide a link to your servo's product page and its specifications? It is not clear that your Power HD 2215S servo can rotate 220 degrees like your MG996R servo. Please note that not all servos have the same rotation range (limit) and pushing them past their mechanical limits could damage them permanently. You might find reading this blog post about the servo's control interface helpful.