Sequential Blasting Machine

The sequential blasting machine was first developed by Research Energy of Ohio, Inc. It is solid state condenser-discharge blasting machine with a sequential timer that permits the detonation of many electric caps. The machine is capable of firing up to 225 ohms per circuit, at different, precisely timed intervals. The machine consists of 10 different firing circuits that are programmed to fire one after another at selected intervals. The combination of 10 different circuits, or intervals, in conjunction with delay blasting caps, can yield many independent blasts.

Sequential timers are used in construction as well as mining applications. The timers allow the use of many delays within a blast. The weight of explosives fired per delay period can be significantly reduced to control noise and vibration effects since there are many delays available. The sequential blasting machine can be set to fire from 5 to 199 ms in increments of 1 ms.

The programmable sequential timer allows the machine to be set with nine different delay increments. The machine also allows for the use of four slave units with the master unit. Using slaves and the master unit, one can get 50 different delays that are fully adjustable.