Hi David,
Did you get my reply to your email on this subject?
You have a couple of issues to work though. They need to be solved separately.
First off, the connection between the VFD and the DigiSpeed-XL J5 connector. The terminals on the connector are;
J5-1 (V-) this needs to be connected to your VFD 0V terminal "L"
J5-2 (Vc) this needs to be connected to your VFD control terminal "O"
J5-3 (V+) this needs to be connected to your VFD +10V terminal "H"
You can check the pin labels by removing the pluggable connector to reveal the labels.
From what you have said below you have P1 and P3 the wrong way around. The DigiSpeed draws less than 5mA from the supply so it will work.
Also, Until you get things working replace LED D4 (manual mode LED) with a jumper, as it would have been when shipped.
When you swap the 2 outer wires on J5, you will also need to do the same to the wires on J4 as well. If not the manual speed pot will work backwards.
Now test that the VFD works in manual mode. If so, you can replace the jumper with the Manual mode LED. Check that it still works. If not, swap the leads on the Led.
Now, put the switch into the auto position. Measure the +10V from the VFD, is it still 10V?
Let me know how you go with that. Then well tackle the DigiSpeed to ModIO problem.
BTW, what version DigiSpeed-XL board do you have?
Cheers,
Peter.
Originally Posted by
haysys
Hi All,
Sorry if this is a bit specific for the general Electrical forum, but I don't see a more specific location unless it would be under VFD's. Anyway, here it is:
I have a Digispeed-XL connected to a Mod-IO board and a Hitachi SJ200-22 VFD running on Mach3 V2.065. I installed a DPST switch to toggle the Digispeed between Manual and Auto, and have a 5K pot on J4 for manual speed adjustment. In manual mode I'm able to control the VFD just fine. Pretty cool actually.
However, when in Auto mode, I am unable to get the Digispeed to work as desired. Turning on the Spindle causes the Zero Speed relay to change and the Control Voltage indicator LED to change (bright red--never varies execpt to turn off) while the Mode LED changes from Solid Red to Fast Blink Red. I'm unable to cause the Lazy double red blink (the condition for Digispeed Enabled but PWM set to zero RPM) unless I disconnect the PWM signal from the cable connecting Mod-IO to Digispeed. Zero RPM on spindle still causes a fast blink. On the possibility that the PWM signal was flipped (Hi for zero and vice-versa), I have set the RPM to 8000, but that did not change anything either. I've also played with the jumper on JP13 but saw no difference (power off on each change so Mod-IO and Disgispeed reset). The jumper remains off the board at thsi time (as I'm unable to determine which position causes what).
Here are my settings on Mod-IO:
Dout2 -- not connected to Digispeed as direction not needed for now.
Dout3 -- Configured to Output #1 As Port = 0, Pin = 3, Active Low
Dout4 -- Ports & Pins, Motor/Spindle set in Motor Outputs, Port = 0 , step (PWM) Pin = 4, Active Low
In Mach3 the following settings are in place:
In Ports & Pins, Spindle Setup tab/Relay Disable Spindle Relays box is unchecked, and Output is # 1 in both CW & CCW.
Motor Control Use Spindle Motor Output and PWM are both Checked, PWMBase Freq = 50, Min = 0%.
I have tried Modbus Spindle - Use Step/Dir as well both Checked and Unchecked. Currently Unchecked (unclear on the correct setting as I have seen both used in documentation)
I have another issue that may be related: The VFD has a nominal 10V 10mA reference voltage "H" (actually 10.57V) that I have running into P1 on J5 on the Disgispeed, P3 is connected to "L" on VFD and P2 is the control voltage "O" going to the VFD. I played with this a bit to find this connection configuration (my initial setting had it working opposite of desired). What is happening is that the Reference "H" 10 Volts is being pulled down to 1 volt (exactly) when in Auto mode, but in manual mode it works fine (Voltage stays at nominal 10V). Intuitively it would seem that the 10mA is insufficient, but that is just a guess on my part.
My questions are:
Why won't my PWM signal allow a zero-speed?
Why is my VFD Ref voltage is being pulled down???
Sorry for the lack of brevity... I was thinking that more info may help.
Any thoughts are welcome. Thanks for your time and attention!!
David
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