Hog Slat Inc. Newton Grove, NC USA January 2021 REV A9 3 Pit Scraper Systems 5. While scraper is moving, activate the limit switch that the blade is traveling towards using a rod or some other method to safely reach the limit switch. While activating the limit switch the scraper motor should stop. If it does not stop, turn off power immediately before scraper blade is allowed to contact limit switch. 6. Swap limit switch wiring position in control cabinet (See Wiring Instructions – Figure 5). 7. Manually move scraper away from end wall and repeat steps 2 and 5. If limit switches are in correct position, activation of the limit switch while scraper is moving toward that same limit switch will stop the motor. Releasing the limit switch will allow scraper motor to restart. Allow scraper motor to run until scraper blade has made contact with limit switch and motor has stopped to confirm proper setup. Programming 24 Hour Timer Always perform programming with power disconnected. The “Red” safety lock-out switch must be “OFF” before opening cabinet door. 24HR timer is used to program the start of a scrape cycle. The “ON” event will signal the blade to travel to the opposite wall. The next “OFF” event will bring the blade back to original starting position. Setting Clock: REFERENCE FIGURE 1 1. To set time on clock, simply rotate the center portion of the timer display in either direction. Align the short hand with the appropriate hour, and long hand with minutes (same as standard analog clock). Program “ON” and “OFF” Events During the programming of the 24HR timer, an “ON” event will equal the time the scraper cycle is to start. An “ON” event can be programmed in a minimum of 15 minute increments by pulling inward the programming tabs. Typically one 15 minute “ON” and one 15 minute “OFF” event is all that is needed for one complete cycle for barn lengths of up to 375FT [114M]. Barn lengths longer than 375FT [114M] will require two “ON” events and two “OFF” events. The “ON” event has to be long enough to allow the scraper blade to travel the full length of the barn based on travel rate of 25FT / MIN [7.6M /MIN]. For example a 200FT [60M] barn will require 8 minutes of travel time, therefore an “ON” event of 15 minutes is sufficient. An “ON” event is when a single tab on the outer dial of the 24HR timer is pulled inward. This will represent 15 minutes. An “OFF” event is anytime the tabs are down or outward.
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