... cable 2. a synchronizing operation with the moving device. FUNCTION DJ1D type constant tension cable reel drum are mainly ... also can extending life of the cable. DJ1D type cable reel drum is very simple,stable and reliable ... guarantee axial lead should be perpendicular to the moving way of the mobile device.Then fix it ... device and cable reel drum.For the small type cable reel drum(DJ1D-I,II,III,IV), ...