A positioning control method for a toothed chain conveying device

Abstract

The invention discloses a positioning control method for a toothed chain conveying device, which is used to control the start and stop of the toothed chain conveying device, and the distance between the upstream and downstream shifting teeth in each group of shifting teeth is set as d 1 , the distance between the downstream shifting teeth and the upstream shifting teeth of the adjacent group is d 2 , the station distance that the circular conveyor chain moves is D 工 , the width of the upstream gear is d 3 , the width of the downstream gear is d 4 The positioning control method includes the following steps: S1. The motor drives the circular conveyor chain to move to the positioning starting point; S2. The motor drives the circular conveyor chain to move forward by a set distance D 设1 , d 2 +d 3 <D 设1 <D 工 : S3. Reduce the running speed of the circular conveyor chain to the set crawling speed; S4. When the falling edge of the photoelectric sensor is triggered, the circular conveyor chain stops; S5. Repeat steps S2 to S4, and the circular conveyor chain moves one station intermittently distance. The positioning control method can better control the intermittent movement of the toothed chain conveying device, and the positioning error is smaller.

Description

technical field [0001] The invention relates to a positioning control method, which is used for the positioning control during the operation of a toothed chain conveying device. Background technique [0002] With the development of automation, in the current production process, we often see toothed chain conveying. The main structure of the toothed chain conveying device includes a circulating conveyor chain driven by a motor. There are also some control methods of toothed chain devices, which can be mainly summarized into the following two methods: [0003] 1. Position control, the servo motor drives the toothed chain device to run at a fixed position by running a fixed number of pulses. This control method is accurate in positioning, but in long-term one-way operation, positioning errors are often inevitably generated, and this kind of Positioning errors will accumulate. In this case, it is usually necessary to eliminate these accumulated errors through servo return to ze...

AI Technical Summary

Problems solved by technology

[0003] 1. Position control. The servo motor drives the toothed chain device to run at a fixed position by running a fixed number of pulses. This control method is accurate in positioning, but positioning errors will inevitably occur during long-term one-way operation, and this Positioning errors will accumulate. In this case, it is usually necessary to eliminate these accumulated errors by returning to the zero position of the servo. In the actual production process, the positioning deviation caused by these slowly emerging errors usually affects the stability of product quality. , even causing damage to the equipment without paying attention, and eliminating the cumulative error by returning the servo to the zero position can sometimes cause operational burdens

[0004] 2. Speed ​​control, the servo motor or ordinary motor drives the toothed chain device to run at the set speed. When the supporting sensor detects the detection point, the device decelerates and stops. The advantage of this control method is that it is simple to control and has no cumulative error, but The running speed in this way will affect the final stop position, which limits the adjustability of the speed. Unless the running speed is extremely slow, it will reduce the positioning accuracy to a large extent. It is usually used for relatively low positioning requirements or high speed requirements. low, and this control method is not suitable for a toothed chain device with multiple sensor detection points between one stop position and the next stop position

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