Re: [CAD_CAM_EDM_DRO] Vexta 5 phase drive hookup

jm_fong wrote:

>Does anyone have a manual or stepper hookup info for a Super Vexta
>UDX5107 5phase driver? This is an older drive that I have not been
>able to find any info on the Vexta/Oriental motor web site or
>Google. I did find a spec sheet once but it was in japanese, can't
>locate that anymore.
>
>The stepper drive is a Berger Lahr RDM599/50 with 10wires. 1.15Amps
>3.2ohm .72deg Nema34. No torque rating listed on nameplate.
>
>I assume the CW and CCW inputs are Phase Type signals. Is this
>correct?
>

No, they are step forward and step reverse signals. It only takes one chip
to gate the step pulse to either CW or CCW. These should be opto-coupler
inputs, so you can hook the + to +5 V with a series resistor, and the - to
the output of the gate chip that is splitting the step pulses. I think
a 74LS00
would do a good job of this.

> If so I can easily hook up a couple of TTL chips or GAL/PLD
>to convert step/dir to phase.
>
>I also need info on hooking up the 10 stepper wires to the 5 motor
>inputs in the correct sequence.
>
>The terminal strip on the Vexta drive is listed as follows
>
>Screw Terminal#
>1 +CW
>2 -CW
>3 +CCW
>4 -CCW
>5 + H.OFF
>6 -H.OFF
>7 TIM
>8 O.H.
>9 COM for terminal 7&8
>10 BLUE MOTOR
>11 RED MOTOR
>12 WHITE MOTOR
>13 BROWN MOTOR
>14 BLACK MOTOR
>15 AC100V
>16 AC100V
>
>

H off seems to be the power down mode, sometimes also called AWO, for
all windings off. TIM is a pulse that occurs once per cycle of the stepping
waveform, I guess every 5 steps. This presumably is used like the index
pulse from an encoder. OH is overheat.

You'd need to find out the sequence of the windings in the motor to
figure out the connections of the 10 wires. If there's no other way,
spin the motor with an electric drill or other spindle, and hook a dual
trace oscilloscope to the wires to figure out the phase relationship.

Note the 100 VAC is Japanese power. These may or may not go up in
smoke on 120 V power!

Jon