Sherline 8700 CNC Rotary Table Indexer
Sherline has taken their accurate and reliable 4″ rotary table into the 21st century with the addition of Computer Numeric Control (CNC). Clockmakers, or anyone with a need to cut gears or other complicated radially symmetrical
patterns, will find this accessory takes all the headaches out of repetitive indexing operations.
All entries are made from a simple keypad. No separate computer is needed. You get everything you need including the 4″ Sherline rotary table with installed stepper motor, microprocessor unit with numeric input keypad, 115 VAC power source and all necessary connecting cables. Operation is very simple. After entering the number of steps per revolution (or the number of degrees per step) on the numeric keypad, the table advances quickly and precisely to the next position at the touch of a single advance key.
If an error is made, previous positions can be accurately recalled by hitting another button. Basic resolution is 28,800 steps per revolution, ±0.006° per step. This allows the accurate machining of items like gears with odd numbers of teeth. Computations are made internally to a high degree of accuracy to avoid cumulative errors.
The CNC rotary indexer is a stand-alone unit. You get everything you need to make complex indexing jobs easy. In addition, the unit can be connected to an existing CNC control to act in conjunction with that system. An input signal triggers the programmed function. When it is complete, it signals back to continue the program. The unit can also be “daisy chained” with other units to trigger sequential actions. As with all Sherline accessories, complete instructions are included.
The rotary table can also be “daisy chained” with Sherline’s linear controller (P/N 8800) to achieve combinations of rotary and linear movement in sequence. This makes it easy to set up for relatively sophisticated operations like
cutting gears without having to know anything about CNC programming beyond what is entered from these simple keypads.
Rotary Indexer Specifications
Table Size: 4″ diameter by 2″ height
Part mounting Provisions: Center thread including chuck adapter and 4 T-slots
Rotation Speed: 1°/ sec to 50°/sec maximum (programmable)
Resolution: 28,800 steps per revolution (±.006° per step)
Backlash Compensation: Programmable
Stepper Motor: 100 oz-in, 2 Amp, #23 Frame size, 400 steps per revolution
Power Supply: Input: 115 VAC 50/60 Hz, Output: 24V, 1 Watt