How to Calibrate Vibrating Grizzly Feeder for Basalt
For basalt quarries in Indonesia and the Philippines, a vibrating grizzly feeder (Type F) is essential for feeding the jaw crusher evenly and scalping out fines. Proper calibration ensures maximum crusher throughput, reduced wear, and consistent product quality. Knowing how to calibrate vibrating grizzly feeder for basalt helps you adjust feed rate, grizzly gap, and vibration intensity to match the abrasive nature of basalt. Below we provide a step‑by‑step guide based on OCP Mechanical Company’s 40 years of experience, with factory‑direct support and 24/7 online assistance.
1. Adjust the Grizzly Bar Spacing
The first step in how to calibrate vibrating grizzly feeder for basalt is setting the correct grizzly bar spacing. The bars are designed to scalp out material smaller than the jaw crusher’s closed side setting (CSS). For basalt, a jaw crusher CSS of 100‑150 mm is typical. Set the grizzly bars at 80‑100 mm to allow fines to bypass the crusher, reducing jaw plate wear. The spacing should be uniform across all bars; use a tape measure or template to check. Replace or repair any bent bars that could cause uneven scalping.
Note: Product data are constantly updated; for the latest specifications of Type F feeder grizzly bars, please contact our online customer service.
Many basalt plants in West Java and Luzon have reduced jaw plate wear by 20‑30% after adjusting bar spacing to match their CSS.
2. Set the Feeder Slope and Amplitude
Another critical aspect of how to calibrate vibrating grizzly feeder for basalt is adjusting the slope and vibration amplitude. For basalt, a feeder slope of 8‑12° is a practical range. Too flat reduces material flow; too steep causes material to fall too quickly, overloading the crusher. The amplitude (stroke) should be 5‑8 mm peak‑to‑peak. Start with the eccentric weights at 70‑80% of maximum, then observe material movement. If material piles up, increase amplitude; if material bounces or spills, decrease amplitude. Use a portable vibration meter or the built‑in scale on the motor.
The above values are for illustration only. OCP continuously improves its products. Contact our online team for current calibration guidelines.
3. Calibrate Feeder Speed for Choke‑Fed Crusher
The final step in how to calibrate vibrating grizzly feeder for basalt is setting the feeder speed to maintain a choke‑fed condition in the jaw crusher. With the crusher running, increase the feeder speed until the crusher power draw reaches 75‑85% of rated capacity. Then back off slightly to avoid overload. If the crusher power fluctuates, the feeder speed is likely too high or too low. A consistent power draw indicates proper feeding. If your feeder has a variable frequency drive (VFD), you can fine‑tune speed remotely from the control room.
OCP’s Type F feeder can be equipped with a VFD and a level sensor that automatically adjusts speed to maintain steady crusher feed, eliminating manual calibration.
4. Perform a Test Run and Fine‑Tune
After making adjustments, run the feeder with basalt for 30 minutes. Check for even material distribution across the full width of the jaw crusher. If material concentrates on one side, adjust the feeder’s discharge chute or the feeder’s suspension. Also, verify that the grizzly bars are effectively scalping fines – collect a sample of the bypass material; it should be free of oversize >100 mm. Record the final settings (slope, amplitude, speed) for future reference.
OCP’s service team can assist with remote calibration via live video. We keep common spare parts (vibrator motors, springs, grizzly bars) in our Jakarta and Manila warehouses for fast delivery.
Understanding how to calibrate vibrating grizzly feeder for basalt maximizes your jaw crusher performance. OCP Mechanical Company provides factory‑direct feeders and 24/7 technical support.
For a no‑obligation consultation or on‑site calibration assistance, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to answer your technical questions, provide free recommendations, and help you achieve peak feeding efficiency for your basalt quarry.
