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Author Topic: RnRMotion breakout board and STEPPERONLINE VFD  (Read 489 times)

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RnRMotion breakout board and STEPPERONLINE VFD
« on: March 14, 2020, 07:14:17 AM »

It's 4 damn days that I'm trying to connect my RnRMotion bob to my STEPPERONLINE VFD and control the speed of the spindle.
If I simply follow the wiring diagram that i found online I should connect the AVI to AI1, ACM to GND and OUT2 to X1(forward signal). Nothing work this way.
When i give M3 command to activate the spindle the 24V tension is from OUT2 to 24V and not from OUT2 to DCM.
Also I haven't understood if I have to provide the board whit a 10V input in order to use AVI PWM signal.

With countless combinations the best result I got was controlling spindle on off and spindle speed but even when PWM signal was at full voltage the vfd frequency never exceeded.

Has someone ever used this combination of VFD and BOB?

This is the board https://www.amazon.it/gp/product/B076VFT59G/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

This is the VFD (manual at the bottom)  https://www.omc-stepperonline.com/it/variatore-di-frequenza/stepperonline-cnc-vfd-37kw-5hp-17a-220v-inverter-del-motore-di-azionamento-a-frequenza-variabile-per-il-controllo-della-velocita-del-motore-del-mandrino?mfp=252-tensione-di-ingresso-v%5B220%20%28monofase%29%5D

Offline Graham Waterworth

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Re: RnRMotion breakout board and STEPPERONLINE VFD
« Reply #2 on: March 14, 2020, 03:56:40 PM »
Have you looked at this page?


Thanks for the help.

I have watched pretty much everything without finding anything to solve my problem but now I actually have solved. I managed to control the spindle speed with AVI signal even if VFD frequency it doesn't perfectly scale with 0-10V signal, probably because I gave 12V instead of 10V as an input. I also haven't yet managed to get spindle reverse rotation function.

Once I will be sure that everything works I will update the thread for future users with my same configuration.