Sunfar C300A + ucbb wiring question

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Sunfar C300A + ucbb wiring question

Postby 4hobby » Wed May 05, 2021 9:19 pm

Hello every one

Recently I get some older Chinese router and I decided to purchase uc300eth + UCBB. I have already connected motion controller and BoB motors are working endtops also
I just need to confirm if schematic of connection Sufnar C300A VFD to UCBB is correct or not. As support from CNC drive is almost equal 0.

is this correct ?
vfd_ucbb1.png


here are all digital pins from vfd:
c300a.png

VFD is already programed I Just need to connect it now to UBCC.
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Re: Sunfar C300A + ucbb wiring question

Postby cncdrive » Fri May 07, 2021 11:11 pm

The For/Rev and direction change part looks fine.
The analog part is wrong.
You have to connect the VC terminal of the VFD to the analog output channel of the UC300ETH.
And you have to connect the GND terminal of the VFD to the Ground terminal of the UC300ETH.
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Re: Sunfar C300A + ucbb wiring question

Postby 4hobby » Mon May 10, 2021 7:55 am

so really no one can answer ?

Even emails to cnc drive left for more than a week unanswered their phone is not picked up also LOL

so proper way of connecting it is ucbb ouput port to FWD analog output1 to VC and GND to GND
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Re: Sunfar C300A + ucbb wiring question

Postby cncdrive » Tue May 11, 2021 4:32 pm

What do you mean by "no one can answer". Just look the previous post and there is my answer.
You posted 3 days after I already posted the solution to your problem and you complaining that you not getting answer?! Hmm I don't get it...
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Re: Sunfar C300A + ucbb wiring question

Postby 4hobby » Tue May 11, 2021 5:09 pm

Probably web browser didn't refresh that website . And I posted that. Sorry.

But it was easier to contact Chinese manufacturer ( with at 8h time difference) that reach you guys:(.

But why when after setting M3S12000 in uccnc vfd showing 15760 and each step higher like s13000 will shows on vfd 18xxx rpm?

My min is set to 6000 and max 24000 in uccnc and if there is setting of s12000 voltage from analog output shouldn't be 5v or close to it ? And when I measured that it was closer to 3v on s24000 was 9.85v if I remember.
So how to fix such behaviour ?
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Re: Sunfar C300A + ucbb wiring question

Postby cncdrive » Wed May 12, 2021 5:45 am

The UCCNC scales the S min and S max values between the PWM min to PWM max. range.
So, you have to set the min and max values for both properly, according to how the VFD processes the analog value. (How the VFD is programmed in other words).
You have to play with thos values to tune the RPM to proper values.
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