Generally, two guide rails are provided on both sides of the ball screw. If there is no guide rail, the middle lead screw tooling will sway from side to side. I would like to ask you, is there any low-cost way to control the stroke of the handwheel behind the ball screw without installing the guide rail, so that the tooling on the ball screw can not sway from side to side?

主要我看滑軌也挺貴的，一套100多，左右兩邊就200多了。

The main thing I think is that the slide rails are also very expensive, more than 100 for one set, and more than 200 for the left and right sides.

把直線導軌換成導柱+直線軸承的形式，能省一點點；

Replace the linear guide rail with the form of guide pillar+linear bearing, which can save a little;

滾珠絲杠不裝在正，裝在一側，線軌裝在另一側，可以省一根線軌。

The ball screw is not installed in the center, but on one side, and the wire rail is installed on the other side, so one wire rail can be saved.

導軌一套一百多也嫌貴。

More than 100 sets of guide rails are too expensive.

那考慮一下用圓棒導向吧。

Then consider using a round bar for guidance.

或者用比較次一點的導軌。

Or use the guide rail with a lower comparison.

實在不行底板上開個槽，絲桿螺母上搞個凸起，就當導軌用了。

It's really not feasible to make a slot on the bottom plate and a bulge on the screw nut, which can be used as the guide rail.

順帶說一下，既然你說精度不需要太高。那要再降低成本，你可以底下的大板結構改一下。你現在大板上凸出來兩個長條狀的塊塊，其持完全可以做成三個零件，因為做成一個零件的話，那銑起來加工費和材料費肯定會貴一些的。

By the way, since you said the accuracy should not be too high. To reduce the cost, you can change the structure of the big board below. Now you have two long blocks protruding from the big plate, which can be made into three parts. Because if you make one part, the processing cost and material cost will be higher.

還有一點，你既然想用導向軸+直線軸承的方式，那你得做好心理準備，設備運行起來必定會發生晃動，直線軸承和導向軸的配合沒那么緊的。

Another point is that if you want to use the guide shaft+linear bearing, you must be prepared. The equipment will shake when running. The linear bearing and the guide shaft are not so tight.

用手輪圖便宜的話，省心一點的用一根光軸配直線軸承，另外絲杠固定座可以自己拿軸承做。

If it is cheap to use the handwheel diagram, it is easier to use an optical shaft with a linear bearing. In addition, the lead screw fixing seat can be made with its own bearing.

承載力不大的話，可以用比較薄的直線導軌，裝在絲杠正下方，一些模組都是這樣用的。

If the bearing capacity is not large, a thin linear guide rail can be used to install it directly below the lead screw. Some modules are used in this way.