GWD Wildcat Manual.Docx
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GWD BAGGING SCALE CHOICE BAGGING EQUIPMENT, LTD. 4804 NORTH MAIN STREET TAYLOR, TEXAS 76574 (512-352-3694 SCALE INTRODUCTION: The GWD-Gravity Gate scale is a gross weigh bag filling scale; meaning the product is weighed in the bag. The scale is designed to handle 10 lbs. to 110 lbs. (5 kg to 50 kg) at a rate of 7 to 8 bags per minute at +/- 2 oz. (50 grams) accuracy or better which is rated at 2 Sigma (95%). *Please note- Accuracies and productions speeds are dependent on product size, shape, and flow characteristics. Scale Sections The GWD-GG comes as 3 main sections. 1) Scale Housing assembly 2) Digital controller 3) Spout assembly. 1. The Scale Housing assembly is provided with an inlet flange (9” x 7”) for mounting to an existing surge hopper. The main scale assembly is typically provided with the digital indicator mounted on a controls plate with the pneumatic components. 2. The digital controller will control the various functions of the scale system. 3. The spout assembly is shipped loose from the main scale, and will need to be remounted prior to calibration. *Please refer to spout installation. All electrical terminations and wiring should be completed by qualified personnel. SCALE INSTALLATION: All scales are to be installed in a way to limit and/ or isolate vibration from surrounding equipment. Excessive vibration will cause weight inaccuracies and slow production speeds. Vibration isolators are most commonly used to dampen vibration from mixers, bucket elevators, and screeners. It may be the case that additional measures be used to limit ambient vibration. The GWD-GG scale is to be installed on a surge hopper with a maximum discharge dimension not to exceed the ID of the scale housing inlet. The scale housing is equipped with slide bars for easy installation on a hopper flange. The hopper flange OD should not exceed 10.25” (Refer to scale installation print). It is recommended that low level bindicators be installed to prevent weight inaccuracies and/ or slowed production. 1. Place surge hopper in the proper position on the plant floor (if applicable). 2. Raise the surge hopper in the air using a hoist or properly sized fork truck. 3. Place the Qty. (4) surge hopper legs underneath upper hopper section and bolt together using an impactor (hardware provided). 4. Drill and anchor surge hopper structure to floor. 5. Slide housing assembly onto hopper flange. Tighten slider bars down onto the flange, and check that scale is level. 6. Mount the spout assembly to the load cell blocks using the hardware provided (refer to spout installation notes). 7. Connect air lines to the spout air cylinder. Air lines will be clearly marked and color coded. 8. Supply incoming power to digital controller. 9. Supply pneumatic drop to filter regulator. *Please note- Clean dry air is mandatory, and supply should be rated for uninterrupted at 80 psi. Spout Installation 1. The spout assembly will have mounting hardware taped to the load cell hanging brackets. Remove hardware and with two people raise the spout to where the rod end bearings are in-line with the load cell mounting blocks located on top of the load cell. 2. With the hardware provided place ¼-28 hex cap screw through the bearing and tighten the screw into the load cell mounting block. Please note there should be 1 washer located between the HCS head and the bearing and 2-3 washers located between the bearing and load cell block (in some instances ¼ nut may be substituted). 3. Reattach airlines to the spout using the color-coded air lines. 4. If a dust tight spout was purchased loosen the ¼ nuts that hold the dust skirt brackets on the spout. 5. Using a putty knife or similar tool; tuck the dust skirt underneath the formed lip of the dust skirt bracket and tighten the ¼ nut. Repeat this process to all 4 sides of the spout. ELECTRICAL/ PNEUMATIC SUPPLY CONTROLS: Electrical Supply All GWD-GG scales are powerĞĚ through the ZŝŶƐƚƌƵŵϭϬϬ controller and can supplied with either 110 VAC 60 Hz. or 220 VAC 50 Hz. input voltage. The standard output control voltage is 24 VDC supplied by the power supply transformer within the controller. The standard configuration for all factory equipment is 24 VDC control voltage, unless otherwise specified on the electrical schematics. It is the customer’s responsibility to ensure that the auxiliary devices interfaced to ƚŚĞ equipment has the correct voltage and control voltage. If you have any questions, please call the electrical department prior to the commissioning of equipment. *A proper earth ground is mandatory to ensure the safe and trouble-free operation of your equipment. Improper grounding may cause erratic behavior in the electrical components. For more information regarding proper grounding please refer to article 250 of NEC or read the following link http://fyi.uwex.edu/mrec/files/2011/04/W4.Biesterveld-NEC-grounding- MREC2010.pdf Pneumatic Supply The GWD-GG requires 80 psi at 3-4 scfm. The scale comes with a dual air regulator. The incoming air is set at 60 psi and actuates the bag clamps on the spout air cylinder. The second regulator is for the 2-position flow gate cylinder and is set to 40 psi. Do not adjust air pressure, it may cause bodily injury or damage the equipment. SCALE COMMISSIONING: Scale Calibration 1. Press and hold the and (POWER/ UNITS + F1 STOP) keys together for 2 seconds until prompted for the passcode “P.CODE?”. 2. Using the alpha-numeric keypad, key in “4788” and press (OK) key one time. 3. The configurations menu “CONFIG” will be displayed. 4. Within the configurations menu there are three options that may be selected I. Calibrate- This menu allows the operator to calibrate the scale using the Calibration zero and the Calibration Span. II. Scale- This menu allows the operator to configure the controller as either a weight stable mode, or fast production mode. A. Weight Stable- When the target weight is achieved the controller will hold the bag until the indicator does not see a weight fluctuation for the given motion setting in the indicator. When selecting the weight stable mode, the operator has the option of choosing the flight or free- fall correction type. Weight stable mode comes standard with data collection. B. Speed- This configuration is set to increase production speeds, and the operator may choose to collect data, or not to collect data. If data collection is selected, then the operator will be prompted to select a data delay timer. The data delay timer is a timed value to allow the flight or free-fall of the product to register before the data is collected. III. Quit- This allows you to save and exit the configurations menu. I. Calibration Procedure From the configurations menu follow these steps to calibrate the digital scale. 1. Press the (ARROW/ DEL) key to scroll to calibrate and press (OK) key one time. 2. The display will read “CAL zero”. By pressing the (OK) key one time the digital controller will establish a new zero. *Please note- If operating a Gross Weigh scale, you must have the bag clamps closed on the spout to properly calibrate. You may do this by switching airlines to the spout cylinder, or cycling the scale without product. 3. The display will read zero in progress (Z IN P) when finding the new zero reference point and then return the Calibrate menu. 4. Press the (OK) key one time and arrow down (ARROW/ DEL) until the display reads “CAL span”. 5. Add the certified calibration weights and calibration straps with hooks to the spout assembly using the Calibration Kit provided (if applicable). If a Calibration Kit was not purchased, then use an alternative known weight and device to hang from the scale spout. Be sure to hang the weights centered and underneath the spout. 6. Press the (OK) key one time and the display will read “SPAN” and you will be prompted to key in the total weight of the calibration weight and straps and then press (OK) key one time. 7. The display will read span in process “S IN P” and capture the new calibration weight. 8. Once the span in process is complete the display will take you back to the calibrate menu and then you press the (ARROW/ DEL) key until the display reads calibration quit “CAL quit” and press (OK) key one time to save the new calibration. 9. Calibration is complete. Change the airlines on the spout back to original configuration. 10.Arrow down to (QUIT) and press (OK) to save and exit from the configurations menu. II. Scale Configuration The scale configuration is used to set the bagging scale to end users customized preference. There are two options that the scale may be configured (stable or speed) depending on the facilities preference. 1. Weight Stable- The weight stable option provides that the scale will come to a stabilized weight without weight fluctuations as it is set in the default motion setting. The default motion setting is set default to 5 divisions in 0.2 seconds. This occurs after the feed gate or catch gate closes; then the indicator looks for the stable weight per the default motion settings. The weight stable option also allows for the facility to select the free-fall or flight correction type. There are four correction types that can be selected 1- Auto Jog (AUT.JOG) 2- Auto Flight (AUT.FLT) 3- Jog (JOG) 4- Manual Flight (MAN.FLT). Auto Jog- The correction type auto jog will not allow an underweight bag to be release from the spout.