public void stopEngines() {
		engines[Configs.enginesConfigs.length - 1].shouldThreadBeOn = false;
		for (int i = 0; i < Configs.enginesConfigs.length; i++) {
			sendCommand(i, 0);
		}
		try {
			gripEngineThread.join();
		} catch (InterruptedException e) {
			logger.error(e);
		}
	}