Use 0-10V + dir on 7i77 instead of +-10V out

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10 years 7 months ago #71671 by tecno
Replied by tecno on topic Use 0-10V + dir on 7i77 instead of +-10V out
Got email this morning from the factory, been unable to find their e-mail earlier as the web page is in Chinese and got help to find this.

Hello Sweden
Nice to receive your message.
About the problem you mentioned,I'v talked to our engineer,he said our B2 series drivers can only support 0-10VDC
But,our B series drivers can support -10VDC to +10VDC.
And the price is the same.


Anyhow, the seller is full of shit saying that Lichuan the factory can not deliver/do not have drivers with ±10VDC.
My inquiry from Day1 early september last year even before I placed the order the spec's has been ±10VDC and not 0-10.

So, be aware of this fraudulent behavior from vipwindows168 / Fast To Buy all the same company found on Ebay/Alibaba

I am really pissed and hope that I will finally get my claim via PayPal to be in my favor asking for new drivers to specs.

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10 years 7 months ago #72023 by tecno
Replied by tecno on topic Use 0-10V + dir on 7i77 instead of +-10V out
We've completed our review and unfortunately are not able to decide this case in your favor.

Paypal's Buyer Protection = It sucks !!!!

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8 years 1 month ago #117928 by xaxxes
Replied by xaxxes on topic Use 0-10V + dir on 7i77 instead of +-10V out
Hi.
I'm sorry that I dig up this old thread, but have exactly the same problem as the thread creator. I also own these Lichuan-B2 drivers.

Servo driver: Lichuan_B2 series
Board: Mesa 7i77

Now I want to solve the problem as suggested, using the ABS function (direction signal + 0-10V). Can someone help me please? Have never wrote some HAL-code.


Thank you.

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8 years 1 month ago #117943 by andypugh
Replied by andypugh on topic Use 0-10V + dir on 7i77 instead of +-10V out
Can you give us an example snippet of the HAL that connects one axis to the 7i77?

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8 years 1 month ago - 8 years 1 month ago #117954 by xaxxes
Replied by xaxxes on topic Use 0-10V + dir on 7i77 instead of +-10V out
Thanks for your reply.

Here is the code for the Y-Axis, which was created with Pncconf:
Code:
#******************* # AXIS Y #******************* setp pid.y.Pgain [AXIS_1]P setp pid.y.Igain [AXIS_1]I setp pid.y.Dgain [AXIS_1]D setp pid.y.bias [AXIS_1]BIAS setp pid.y.FF0 [AXIS_1]FF0 setp pid.y.FF1 [AXIS_1]FF1 setp pid.y.FF2 [AXIS_1]FF2 setp pid.y.deadband [AXIS_1]DEADBAND setp pid.y.maxoutput [AXIS_1]MAX_OUTPUT setp pid.y.error-previous-target true net y-index-enable <=> pid.y.index-enable net y-enable => pid.y.enable net y-pos-cmd => pid.y.command net y-vel-cmd => pid.y.command-deriv net y-pos-fb => pid.y.feedback net y-output => pid.y.output # ---PWM Generator signals/setup--- setp hm2_5i25.0.7i77.0.1.analogout1-scalemax [AXIS_1]OUTPUT_SCALE setp hm2_5i25.0.7i77.0.1.analogout1-minlim [AXIS_1]OUTPUT_MIN_LIMIT setp hm2_5i25.0.7i77.0.1.analogout1-maxlim [AXIS_1]OUTPUT_MAX_LIMIT net y-output => hm2_5i25.0.7i77.0.1.analogout1 net y-pos-cmd axis.1.motor-pos-cmd net y-enable axis.1.amp-enable-out # ---Encoder feedback signals/setup--- setp hm2_5i25.0.encoder.01.counter-mode 0 setp hm2_5i25.0.encoder.01.filter 1 setp hm2_5i25.0.encoder.01.index-invert 0 setp hm2_5i25.0.encoder.01.index-mask 0 setp hm2_5i25.0.encoder.01.index-mask-invert 0 setp hm2_5i25.0.encoder.01.scale [AXIS_1]ENCODER_SCALE net y-pos-fb <= hm2_5i25.0.encoder.01.position net y-vel-fb <= hm2_5i25.0.encoder.01.velocity net y-pos-fb => axis.1.motor-pos-fb net y-index-enable axis.1.index-enable <=> hm2_5i25.0.encoder.01.index-enable net y-pos-rawcounts <= hm2_5i25.0.encoder.01.rawcounts # ---setup home / limit switch signals--- net home-y => axis.1.home-sw-in net y-neg-limit => axis.1.neg-lim-sw-in net y-pos-limit => axis.1.pos-lim-sw-in

I think i have to edit the section "PWM Generator signals/setup" but don't know how.

Many thanks.
Last edit: 8 years 1 month ago by xaxxes.

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8 years 1 month ago - 8 years 1 month ago #117959 by andypugh
Replied by andypugh on topic Use 0-10V + dir on 7i77 instead of +-10V out

xaxxes wrote: Thanks for your reply.

Here is the code for the Y-Axis, which was created with Pncconf:

Code:
net y-output => pid.y.output # ---PWM Generator signals/setup--- setp hm2_5i25.0.7i77.0.1.analogout1-scalemax [AXIS_1]OUTPUT_SCALE setp hm2_5i25.0.7i77.0.1.analogout1-minlim [AXIS_1]OUTPUT_MIN_LIMIT setp hm2_5i25.0.7i77.0.1.analogout1-maxlim [AXIS_1]OUTPUT_MAX_LIMIT net y-output => hm2_5i25.0.7i77.0.1.analogout1


Change the above to
Code:
#Near the top of the file loadrt abs names = abs.x,abs.y,abs.z addf abs.x servo-thread addf abs.y servo-thread addf abs.z servo-thread #Then for each axis # delete net y-output => hm2_5i25.0.7i77.0.1.analogout1 net y-output => abs.y.in net y-abs abs.y.out => hm2_5i25.0.7i77.0.1.analogout1 # This is the direction output, use is-negative if required # Choose a GPIO pin to suit. net y-dir abs.y.is-positive => hm2_5i25.0.7i77.0.0.output-00

Docs: linuxcnc.org/docs/2.7/html/man/man9/abs.9.html
Last edit: 8 years 1 month ago by andypugh.
The following user(s) said Thank You: xaxxes

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