Thinking about 1F’s ability to read and react to current draw by the steppers when homing, thought about using the ability for tracing a pattern. Aske chat GPT and this is it’s answer
Given that at least one cnc brand (Onefinity) has the ability to detect current draw increases from the axis stepper motors, would it be possible or practical to use this capability to follow a wood pattern / template to set up a repeatable cut path?
Yes, it is possible and practical to use current draw increases from the axis stepper motors to follow a wood pattern or template and set up a repeatable cut path. This technique is commonly referred to as “cutting by current.”
When a stepper motor is working harder, it draws more current, and this increase in current can be detected by the CNC controller. By monitoring the current draw, the controller can determine if the cutter is encountering more resistance, which could indicate that it’s cutting into a harder area of the material or deviating from the desired path.
To use this technique, you would need to create a template of the desired cut path on the material, either by drawing it or using a pre-existing pattern. Then, you would perform a test cut with a low feed rate and monitor the current draw. As the cutter encounters the pattern, the current draw will increase, and the controller can record the position where the increase occurred. This process is repeated at higher feed rates until the desired cutting speed is achieved, and the controller has a precise map of the material’s surface.
Once the map is complete, the controller can use it to guide the cutter along the desired path, compensating for any deviation by adjusting the feed rate or cutter speed. This technique is especially useful when working with irregular or curved surfaces, as it allows for precise and repeatable cuts that follow the contours of the material.
It’s worth noting that not all CNC machines have the ability to detect current draw increases, and even those that do may require some additional hardware or software to implement this technique. However, if your machine does support cutting by current, it can be an incredibly powerful tool for creating precise and repeatable cuts.
How about it Onefinity, raise the platform once again???