1. If jumper is hit the position of ON DP,
that means 16 segment (4988) or 32 segment (8825)Jm connected motor
2. Jv connect 5v and 12v-24v power supply
3. Jc E, S, D, G, respectively corresponding to the connection
of the Enable/Step/Dir/Gnd drive signal output
Pay attention to when installation direction,
otherwise it may burn drive even the mainboard
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