Linear guides with no stick-slip effect for a CNC-controlled laser cutting system

• What was needed?  drylin W linear guides, energy chain type E2 mini
• Requirements: Low maintenance, long service life, reduction in manufacturing costs
• Industry: CNC cutting systems; Machine tools
• Success for the customer: The linear units allow lubrication- and maintenance-free operation. They do this without the stick-slip effect while reducing manufacturing costs for the customer.

This CNC-controlled laser cutting system works with a travel range of 1,000 x 500 mm, which is navigated with stepper motors. The machine, which was designed for private hobby use, is equipped with a maintenance-free CO2 laser. Since the system is for private hobbyists and not industrial use, longevity and maintenance frequency were not the only considerations for the individual components. The solution also had to be economical.
A solution was that met these requirements was also needed for the axes' linear guides. After roller guides had been rejected, a different solution was chosen for the prototype.

After detailed consultation, the customer decided to equip the X- and Y-axis with drylin linear guides. Specifically, the CNC laser cutting system on the X-axis relies on the drylin® W-guide rail WSQ-06-30 with sledge WW-06-30-06. On the Y-axis, a Linear rail type drylin® WS-10 in combination with two slides each WJ200UM-01-10 installed (see Picture 1).
The laser travels at up to 500mm/s and without any stick-slip effect. To manage the cable, the company also relied on a Type E2 mini energy chain set (s. Picture 1). The igus® logo (Figs. 2 and 4) was thus created at approx. 20 watts of power and 8 mm/sec feed rate.
The linear carriages' advantages are freedom from lubrication and maintenance. The tribo-polymers in the linear unit allow it to move with minimal friction and a self-lubricating effect. No external lubrication needs to be added.