P/N 8760 plus 8765 and 8770 kits
The P/N 8760 Sherline driver box includes 4 drivers, a power supply, 4 connection cables, a parallel cable, and Linux/EMC software. Software technical support that comes with the full CNC system is not included when only the driver box is purchased. Packages with driver box and stepper motors are also available. See below. (Click on photo for larger image.)
• 8765
Driver Box and two 67127 stepper motors (lathe)—$730.00
• 8770
Driver box and three 67127 stepper motors (mill)—$805.00The 8765 and 8770 kits are designed for those who wish to purchase a CNC ready lathe or mill and use their own computer. The 8760 is for applications where stepper motors are already in place.
Includes Linux and EMC on CD-ROM. CLICK HERE to learn more about the advantages of Linux and how it compares to Windows. Please read this if you are unsure about your ability to install Linux yourself on your own computer. |
When Sherline developed the CNC system for the mill, we installed the drivers and power supply inside the computer box as a complete package. For those who wish to run the stepper motors on their Sherline CNC-ready machines using a computer other than the one supplied as part of Sherline's lathe and mill CNC systems, we now offer the driver box and power supply as a separate item.
The anodized aluminum box contains four drivers. Each outputs to its own cable, labeled X, Y, Z, and A, that plugs directly into Sherline's P/N 67127 stepper motors. These stepper motors are pre-wired with a plug to match that on the end of the driver box cables, making hookup easy and fast. A 25-pin parallel cable (included) runs from the box to the parallel port on a computer, which you supply. Power comes from an external power supply (included) that plugs into the box. Also included is a CD that contains the correct version of the Linux operating system and EMC control program that Sherline uses in its CNC system, should you wish to install them on your own computer. The operating instructions for CNC and a short course in writing G-code by Joe Martin are also included. The driver box has its own power on/off switch and a bright red LED that indicates when power is on. It operates on either 110 or 220 VAC power (switchable).
Driver box available for OEM...
The Sherline P/N 8760 driver box is available for manufacturers wishing to put together a CNC system of their own. Why reinvent the wheel? This box, along with Sherline's pre-wired stepper motors, makes it easy to put together a custom CNC package. Contact Sherline for details on our OEM quantity pricing. We have also left plenty of space on the top of the unit to laser engrave your logo and company information, and can handle that for you in-house. In addition, OEM suppliers using our driver box will be provided a link and a 300 word description at no charge on a special page on our website to describe your product.
To read operation instructions for hooking up and using the 8760 Driver box CLICK HERE. (File is in .PDF format--requires Adobe Acrobat to open.)
Power Supply:
Input: 100-240 VAC, 47-63 Hz, 3A (automatically adapts to incoming voltage)
Output: 24 VDC, 4A
Parameters:
∙ Logic high levels should be greater than 2 volts.
∙ Logic low should be less than 1/2 volt.
∙ Step pulses are active low.
∙ Step pulses should be at least 22 microseconds long.
∙ The lines labeled as EMC inputs or outputs can be disregarded in other
systems.
∙ For use with software other than EMC, make sure your software addresses
the correct I/O lines for step and direction as shown below. Sherline is not
able to provide assistance for other programs. For help with the EMC software,
see http://www.linuxcnc.org/
∙ We recommend at least an 800 MHz Pentium class computer or faster for
use with the frequency mode.
In operation, the power to the motors will be reduced to half current after 3 seconds of inactivity. This can be changed to 1/4 power with a jumper on H1.
DB25 pin out:
1 - Input from EMC (may be ignored in other systems)
2 - X Direction
3 - X Step
4 - Y Direction
5 - Y Step
6 - Z Direction
7 - Z Step
8 - A Direction
9 - A Step
10 - NC
11 - Output to EMC (may be ignored in other systems)
12 - Output to EMC, XYZ home (may be ignored in other systems)
13 - NC
14 - Input from EMC, C1 (may be ignored in other systems)
15 - NC
16 - Input from EMC, C2 (may be ignored in other systems)
17 - NC
18-25 - Ground
Headers on PC board:
H1 - Will reduce current to 1/4 after 3 seconds
H2 - UnimplementedH3 - Will remove power from drivers immediately (panic stop)
RESET - Will hold the drivers in reset condition
Motor Connectors:
∙ 5-pin DIN male
∙ Five to 30 volts (better performance at higher voltage)
∙ 2 amp unipolar configuration
∙ 800 steps per revolution (microstepping), equates to 16,000 steps/inch with .050" pitch leadscrew
In Figure 1 below, wire colors of the 8-wire SKC brand stepping motors are shown. Figure 2 shows pin layout and wire colors for the 6-wire NMB brand motors now used by Sherline. Other brands of motors may use other colors.
(A) - Coil A uses the black and green wires with black/white and green/white as the center tap.
(B) - Coil B uses blue and red wires, with blue/white and red/white as the center tap.
Figure 1—(Above) Shinano Kinshi Motor and plug color codes for 8-wire motors.
Figure 2—Sherline NMB six-wire motors have only two wires from the center taps, and the colors are different. For 6-wire motors, the order would be (counterclockwise starting at upper left): Yellow, red, black + white, orange, brown. Again, this view shows the connector from the back side where the wires would be soldered on.
Sherline offers stepper motors with your choice of a pre-wired connector plug (P/N 67127, left) for use with our individual axis or CNC system drivers, or with six raw wire leads (P/N 67130, right) for general use. Flats are ground onto the shafts to accommodate the coupler and handwheel setscrews.
CLICK HERE for complete technical specifications on the stepper motors or CLICK HERE to see a more detailed page on the motors.
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