当数控机床出现反向过失大、定位精度不稳定、过象限出现刀痕时，首要要检查精密滚珠丝杠有没有空地。检查的方法有什么？下面导轨丝杠厂家为您讲解：

When the CNC machine tool has large reverse error, unstable positioning accuracy, and tool marks across the quadrant, the first thing to check is whether the precision ball screw has space. What are the methods of inspection? The guide rail lead screw manufacturer will explain to you:

需准备两块百分表，一块百分表合作钢球放在丝杠的一端基地孔中，测量丝杠的轴向窜动，另一块百分表测量作业台移动。正反翻滚丝杠，查询两块百分表上反映的数值，根据数值不相同的改动供认缺点部位.

Two dial indicators shall be prepared. One dial indicator cooperation steel ball shall be placed in the base hole at one end of the lead screw to measure the axial movement of the lead screw, and the other dial indicator shall measure the movement of the workbench. Turn the lead screw forward and backward, query the values reflected on the two dial indicators, and identify the defective parts according to the different values

如测量丝杠的百分表在丝杠正反向翻滚时指针没有摇晃，说明丝杠没有窜动。如百分表指针摇晃，说明丝杠有窜动景象。

If the pointer of the dial indicator measuring the lead screw does not shake when the lead screw rolls forward and backward, it means that the lead screw does not move. If the pointer of the dial indicator shakes, it indicates that the lead screw moves.

该百分表大与小测量值之差便是丝杠的轴向窜动的距离。这时，我们就要检查支撑轴承的背帽是不是锁滚珠丝杠副紧、支撑轴承是不是已磨损失效、预加负荷轴承垫圈是不是适合。

The difference between the large and small measured values of the dial indicator is the axial displacement distance of the lead screw. At this time, we need to check whether the back cap of the support bearing is tight with the locking ball screw, whether the support bearing is worn out, and whether the preloaded bearing washer is suitable.

假设轴承没有疑问，只需从头配做预加负荷垫圈就可以了。假设轴承损坏，需要把轴承更换掉，从头配做预加负荷垫圈，再把背帽背紧。丝杠轴向窜动大小首要在于支撑轴承预加负荷垫圈的精度。丝杠设备精度理想的情况是没有正反空地，支撑轴承还要有0.02mm支配的过盈。

Assuming that there is no doubt about the bearing, just make the preloaded washer from scratch. Assuming that the bearing is damaged, it is necessary to replace the bearing, make a preloaded washer from the beginning, and then tighten the back cap. The axial movement of the lead screw mainly depends on the accuracy of the preloaded washer of the support bearing. The ideal condition for the accuracy of the lead screw equipment is that there is no positive and negative space, and the support bearing also has a 0.02mm dominant interference.

如检查出精密滚珠丝杠存在空地。首要检查丝杠和螺母的螺纹圆弧是不是现已磨损，如磨损严重，有必要更换全套丝杠螺母。如检查磨损纤细，就可以更换更大直径的滚珠来批改。

If the precision ball screw is found to be empty. First, check whether the thread arc of the lead screw and nut is worn. If the wear is serious, it is necessary to replace the full set of lead screw nuts. If the wear is fine, the ball with larger diameter can be replaced for correction.

要检查出丝杠螺母副的空地，换算成滚珠直径的增加，然后选配适合的滚珠从头安装。精密滚珠丝杠运动不平稳、噪音过大等缺点的修补。

Check the clearance of the screw nut pair, convert it to the increase of the ball diameter, and then select the appropriate ball to install from the beginning. Repair the defects of the precision ball screw, such as unstable movement and excessive noise.

滚珠丝杠螺母副运动不平稳和噪音过大，大多滚珠丝杠副数是由于润滑不良构成的，但有时也也许因伺服电机驱动参数未调整好构成的。

The movement of the ball screw nut pair is not smooth and the noise is too loud. Most of the ball screw pairs are caused by poor lubrication, but sometimes the servo motor drive parameters are not adjusted properly.

丝杠在作业中如发生噪音和振动，在检查传动有些没有疑问后，首要要考虑到润滑不良的疑问，丝杠螺母自动润滑系统一般堵塞，不能自动润滑。更多相关内容就来我们网站http://www.jngongrun.com咨询吧！

In case of noise and vibration during the operation of the lead screw, after checking whether there is any doubt about the transmission, the first consideration should be given to the question of poor lubrication. The automatic lubrication system of the lead screw nut is generally blocked and cannot be automatically lubricated. Come to our website for more relevant content http://www.jngongrun.com Ask!