On Tue, 23 Feb 2021, Alan Condit wrote:
Date: Tue, 23 Feb 2021 10:53:26 -0600
From: Alan Condit <[email protected]>
To: "[email protected]" <[email protected]>,
Wallace Peter C. <[email protected]>
Subject: 7i76 spindle speed control with Cyclotrol C150 Controller
PCW,
I am trying to use my 7i76 Mesa card??s spindle control to control the speed on
my DanFoss Cyclotrol C150 controller. The manual says,
"PROCESS CONTROL SIGNALS
A 0-10v dc control signal input may be used by connecting process signal(+) to
SP2 and process(-) to SP3. With tachometer feedback, the motor speed will track
the process voltage to better than 1 % linearity. The input impedance is
approx. 50K ohms.
Current process signals may be used with an additional resistor. A 1-5 mA signal can be
accommodated by shunting SP2 and SP3 with a 2.0K ohms, 1 /2 watt resistor; for 4-20 mA,
use a 500 ohms , 1 /2 watt. Set the "P" switch in the closed (up) position, to
allow the Cycletrol 150 to operate with current process signals.??
OPEN SWITCHES (DOWN)
"A??, ??B??, ??C??, ??D"
BASIC SPEED CONTROL
Control RUNS/STOPS from a single input command.
Closure on JOG puts Cycletrol into a RUN mode.
Opening the JOG produces a STOP command.
I am not sure if SP1 should connect to Spindle+ or Spindle-. I am pretty sure
SP2 should be SpindleOut. SP3 should connect to either Spindle- or Spindle+
which ever is left open after connecting SP1. Can anyone tell from the info I
have furnished what the correct wiring should be. I am leaning towards Spindle-
to SP3, SpindleOut to SP2 and Spindle+ to SP1. If I guess wrong will it damage
the 7i76 board?
The full manual is at
<https://www.grahammotorandcontrols.com/pdf/Cycletrol%20C150%20DC%20Instruction%20Manual.pdf
<https://www.grahammotorandcontrols.com/pdf/Cycletrol%20C150%20DC%20Instruction%20Manual.pdf>>
Thanks,
Alan
As long as the voltage at SP1 is less than 15V, (relative to SP3) you should be
OK with
SP1 --> SPIN+
SP2 --> SPINOUT
SP3 --> SPIN-
Peter Wallace
Mesa Electronics
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