CTP制版机丝杠传动系统的热误差建模

目的为了有效地减少因CTP制版机丝杠传动系统热膨胀所产生的制版质量问题。方法通过对CTP丝杠传动系统进行热误差实验,分析其膨胀量与丝杠温度、丝杠位置的关系,并建立补偿数学模型。结果经检验,所得模型的计算值与实际测量值偏差保持在0.0320 mm, 0.0406 mm]区间内,基于这一结果,操作人员可以利用CTP驱动软件,应用模型的计算结果对CTP制版机进行热误差优化预设置,补偿扫描头的热误差,进而提高CTP制版质量。结论通过对CTP制版机进行热误差补偿,可以有效地减少因丝杠热膨胀导致的扫描激光头扫描位置发生变化,版材内容发生偏移、变形、套印不准等问题的发生,提高了印刷质量。

Thermal Error Modeling of Ball-screw Drive System of CTP Plate-making Machine

The work aims to effectively reduce the plate-making quality problems caused by the thermal expansion of the ball-screw drive system of the CTP plate-making machine. By taking the thermal error experiment of the CTP ball-screw drive system, the relationship between the expansion amount, the screw temperature and the screw position was analyzed and the mathematical model of compensation was established. Proved by experiment, the deviation between the calculated values and actual measured values of the obtained model was kept within the range of 0.0320 mm, 0.0406 mm]. Therefore, the operator could use the CTP driver software to apply the calculation results of the model to optimize the thermal error of the CTP plate-making machine, and compensate the thermal error of the scanning head, and then improve the quality of the CTP plate-making. The thermal error compensation of the CTP plate-making machine can effectively reduce the change of the scanning position of the scanning laser head caused by the thermal expansion of the ball-screw system, the offset, deformation, misregistration of the plate content, etc., so as to improve the printing quality.