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Author Topic: G100 and VFD`s  (Read 8067 times)

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G100 and VFD`s
« on: January 29, 2008, 02:26:55 AM »
Hi all,

I am trying to control HSD (cnc Router) spindle speed with the G-100,through a VFD and not sure
if I can.
The VFD manuals states it can be controlled 4 ways
1. By the digital Keypad (on the vfd)
2. 0 -10 volts input.....        I understand the G-100 outputs at only 5v ,Analog.
3. 4 -20mA input......
4. RS-485 comm port
5. Potentiometer on the keypad (on the vfd)

Any help or info would be great.
Regards
whatda?

Offline Chaoticone

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Re: G100 and VFD`s
« Reply #1 on: January 29, 2008, 12:57:09 PM »
Does your VFD have a scaling parameter for input analog voltage. It would be used to tell the drive that 5V=10V.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: G100 and VFD`s
« Reply #2 on: January 29, 2008, 03:17:59 PM »
Thanks for the reply,

Sorry I am unsure if the VFD has or can  scale parameters,
How would I tell, would the manual say this.

Regards
whatda?

Offline Chaoticone

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Re: G100 and VFD`s
« Reply #3 on: January 29, 2008, 08:32:13 PM »
The manual should. Do you have a pdf manual you can post or link to one?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: G100 and VFD`s
« Reply #4 on: January 29, 2008, 11:34:53 PM »
Hi all,

I am trying to control HSD (cnc Router) spindle speed with the G-100,through a VFD and not sure
if I can.
The VFD manuals states it can be controlled 4 ways
1. By the digital Keypad (on the vfd)
2. 0 -10 volts input.....        I understand the G-100 outputs at only 5v ,Analog.
3. 4 -20mA input......
4. RS-485 comm port
5. Potentiometer on the keypad (on the vfd)

Any help or info would be great.
Regards
whatda?


You could use a DigiSpeed-GX. It was designed for this purpose and converts the 0-5Vdc from the G100 to an Isolated 0-10Vdc suitable for your VFD.
http://homanndesigns.com/store/index.php?main_page=product_info&cPath=1&products_id=21

Cheers,

Peter.

----------------------------------------------------
Homann Designs
http://www.homanndesigns.com
email: peter at homanndesigns.com
Re: G100 and VFD`s
« Reply #5 on: January 30, 2008, 12:25:10 AM »
Thanks for the feed back,

Before I buy anything else for this setup I wanted to be sure
that there wasnt any other way,something I missed.

I have attached the manual for the VFD,
If anyone can see whether I can do it or not ,I would
be greatful if someone could let me know.

Offline Chaoticone

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Re: G100 and VFD`s
« Reply #6 on: January 30, 2008, 08:02:10 AM »
I think it may be parameter 50, Pot. Freq. gain. Is this all there is to the manual?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: G100 and VFD`s
« Reply #7 on: January 30, 2008, 03:51:28 PM »
Thanks Brett,
I have tryed posting the user manual, but it would not upload
The one I sent last post was the quick start guide.

From the manual all it says on parameter 50 is

PR.50
Potentiometer Frequency Gain............ Factory setting 100.0
Setting 0.10 to 200.0% .....................Unit 1%

This parameter sets the ratio of analog input Vs Frequency output



Which sounds like what I am after, would I set it to 200% ? then.
ie 5volts = to 10 volts input.

Thanks
regards

whatda?

Offline Chaoticone

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Re: G100 and VFD`s
« Reply #8 on: January 30, 2008, 05:11:30 PM »
Yup, I think that is what you will need to do. Give it a try and see.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: G100 and VFD`s
« Reply #9 on: January 31, 2008, 03:02:30 PM »
Thanks for your help,

I ran out of time on this.
It sucks when work gets in the way of a good hobby!

Will be away awhile ,let you know how It go
when I get back.
regards
whatda?