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Parameters | Logic high levels should be greater than 2 volts. |
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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 LinuxCNC inputs or outputs can be disregarded in other systems. | |
For use with software other than LinuxCNC, 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 LinuxCNC 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 LinuxCNC (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 LinuxCNC (may be ignored in other systems) | |
12 – Output to LinuxCNC, XYZ home (may be ignored in other systems) | |
13 – NC | |
14 – Input from LinuxCNC, C1 (may be ignored in other systems) | |
16 – Input from LinuxCNC, 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 – Unimplemented H3 – 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 |
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