AMC drive use 2 DAC for output? DC motor

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turbothis
Posts: 309
Joined: Fri Mar 15, 2019 4:07 pm
Location: southern oregon

AMC drive use 2 DAC for output? DC motor

Post by turbothis » Fri Aug 20, 2021 10:28 pm

i am using these drives
http://servosystems.com/pdf/amc/30a20ac.pdf

simple 2 wire DC brushed servos

not sure if i need something like this with 2 DAC outputs?

ch1->OutputChan0=1; //positive pin on drive
ch1->OutputChan1=2; //negative pin on drive

or wire ch1->OutputChan0=1; to positive pin and negative pin to kanalog board ground?

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TomKerekes
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Joined: Mon Dec 04, 2017 1:49 am

Re: AMC drive use 2 DAC for output? DC motor

Post by TomKerekes » Sat Aug 21, 2021 12:32 am

Hi turbothis,

No, you only need one DAC since the Drive accepts +/- 10V. You might do this simple test and this with a DAC (step 2).
Regards,

Tom Kerekes
Dynomotion, Inc.

turbothis
Posts: 309
Joined: Fri Mar 15, 2019 4:07 pm
Location: southern oregon

Re: AMC drive use 2 DAC for output? DC motor

Post by turbothis » Sat Aug 21, 2021 4:31 am

ok i got the Y axis moving safely!
thanks a ton once again for the support

trying to figure out the counts per inch
i think 2000 on the servo encoder
x4 for quadrature
2-1 reduction on the pulley
.200 screw

80,000?
i do this and with the test indicator moving .500" i am about .010" short :?

if i punch in 81250 i am about right on .500 move and reading

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TomKerekes
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Re: AMC drive use 2 DAC for output? DC motor

Post by TomKerekes » Sat Aug 21, 2021 8:32 am

If the screw was 5mm pitch it should be 81280 counts/inch
Regards,

Tom Kerekes
Dynomotion, Inc.

turbothis
Posts: 309
Joined: Fri Mar 15, 2019 4:07 pm
Location: southern oregon

Re: AMC drive use 2 DAC for output? DC motor

Post by turbothis » Sat Aug 21, 2021 5:30 pm

Image

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