To accomplish the patterns typically imparted onto metal with guilloché, the cutter needs to be moved a repeatable distance each time the movement is made. (Such movement is typically in the X axis.)
A Ratchet Stop is used on the cross slide to accomplish this.
Examples of this device in use
- This YouTube video from Frédéric Verschoore shows a ratchet stop at around 9:30 minutes into the video.
Disclaimer: eMail comments to me at OTBookOfKnowledge @ Gmail.com. The process of woodturning involves the use of tools, machinery and materials which could cause injury or be a health hazard unless proper precautions are taken, including the wearing of appropriate protective equipment.