Has anyone installed the Super Longboard to their VFD? If so, were there any issues in doing so?
I have been running mine for about a week. The only issue i has been the RPM’s don’t match between the VFD and gSender. Vcarve inserts the bit rpm from the tool database, when I run the file the RPM is lower on the spindle than the file is calling for.
I have the same issue that the rpm’s don’t match
The longboard and super long board have an advantage over other cncs in that they need the pwm converter (that black box on the controller cable) if you open it you’ll see the converter. On it is a potentiometer. You can tune it to your machine so it’s closer. I would aim for your average rpm range if it’s low on low ranges and high on high ranges or vice versa
The Super Longboard and the original both work perfectly with our spindle kits. Their setup and wired exactly the same as well.
Both give off a digital pwm signal via the PWM and GND wires. Therefore you can wire up the SLB the exact same way and use it exactly the same way. You hit the “RUN” then allow the cnc to control the RPM’s.
Fine-tuning of the RPM’s are indeeded needed and easily done with these digital converters of ours. Exaclty the way chris describes above.
I’m understanding the SLB is capable of supporting our ATC. I’m very excited to dig into this functionality with our SLB that arrived this past week. This week, after shipping a whole bunch of ATC’s, i’ll finally get to dig into it further.
My immediate hope is there’s a relay capable of triggering the RUN function on our vfd. If so… a minor vfd program change is needed, but after that the hope is the M3 command will trigger the RUN function instead of us having to do it manually.
This will be vital for ATC functionaly so i’m confident i can figure that out.
Stay tuned.
Could you please post a picture of the connection to the SLB?
I connected my VFD to the SLB based on the picture from the other controllers resouce page and the SLB VFD instructions page. After doing so my SLB no longer works. I’m not sure if it’s the SLB itself or the Estop button being failing. I’m waiting for a response to my email from Sienci Labs right now as to what to do next. Prior to connecting the VFD the SLB appeared to be functioning properly.
This might help… The PWM and GND on the Super Longboard… is equal to the SpinPWM and GND on the Longboard according to the research i’ve uncovered thus far.
This matches with their documentation:
I’m under the impression from Sienci that the SLB can be wired directly to the VFD but I’m not seeing in the SLB manual or user forums how and where the (SLB’s) PWM/GND should get wired in the VFD…specifically the wiring between the SLB and a Huanyang 2.2kw 220V VFD and 2.2kw 24000 RPM spindle. I have ethernet connected between the SLB and computer, and still have the 0-10V PWM relay configured based on the older pdf: On the upper terminal bar I jumped between DCM and FOR; On the lower (middle) terminal bar I jumped between DCM and ACM, and ran the three leads from the PWM 0-10V relay to 24V, ACM and VI.
Followed the SLB Manual and feedback from Sienci to update my new configuration between the 2.2kw 400 Hz spindle, 220V HY VFD and Sienci’s superlongboard (SLB). MUCH simpler…basically just a shielded twisted pair between the SLB’s RS485 B & A terminals and the HY VFD’s RS- and RS+ terminals. Communication between my computer and the SLB is via either USB-C or Ethernet (I can choose either). Spindle speed, start/stop (e.g., M3, etc.) and dwell (5 second spin up before programmed movement) are now pulled from the tool data (in Aspire/VCarve Pro) and built into the g-code, and controlled from the computer/G-sender/grblHAL. Note: I plugged the water pump for the spindle into an iOT relay (and wired between the relay and the flood terminals on the SLB). But I end up manually running the pump when I first turn on the system so the air bubbles get worked out and I can check for leaks and solid flow.
I’m interested in connecting my PNC 80mm air cooled 220v spindle via the RS485 for more accurate control than provided with the PWM. Is this what you are doing here in this post? The connection you describe replaces the cable provides with the potentiometer Chris mentions? The RS-,RS+ terminals shown in your picture are inside the VFD?
Generally, yes to all. I’m not adept to all the intricate details, especially RS485, but this simple configuration with the SLB is how I interpreted what Chris and the online guidance is showing. I wasn’t happy with the previous set-up using the 0-10V PWM relay (previous Longboard - PWM - VFD configured based on the older pdf). I found it challenging to control speed, etc., so I ended up running the spindle manually. Switching to the SLB eliminated a lot of the jumping and spaghetti wiring although there was a learning curve for the extra settings in grblHAL/GSender. Everything I’ve experienced so far has run clean as designed and programmed. I’m running a Huanyang 2.2kw 220V water-cooled VFD but don’t see why it would be any different for an air-cooled.
Thanks for the response, I’m anxious to give this a try…
I opened up my VFD today to find the connector you used. It seems mine is (RS-,RS+) is already connected to the Modbus connector on the case, wouldn’t it be easier to use that to connect to the SLB? Chris, Daniel how are you connecting to your SLB now that you have had it for a while?
FYI: It took a while but finally figured it out after digging through the grblHAL codebase.
Stay tuned for SLB Modbus control of our VFD.
Using Modbus will allow us to achieve more accurate RPM control.
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I just found this post. I looking forward to switching to RS485 control of my 2.2kw PwnCNC spindle system. I have a Chinese spindle/vfd system that wasn’t reliable and was stalling when surfacing using shallow passes but I was able to control via the RS485 method.
Daniel,
Do you have any updates on this effort? I tried today to figure something out but no luck. Guess I need to wait for the “official” solution.
Have you seen the KB?
https://support.pwncnc.com/kb/article/468-super-long-board/
In addition to Chris’s comment also take a look at this video daniel made: https://www.youtube.com/watch?v=9DQyMAsiPK4&t=158s
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Thanks Chris and gadgetsrule99, I appreciate the links. I forget where all I post comments to and forget everyone is not subscribed to our youtube and such.
both are correct.
You can also reach out to support@pwncnc.com for additional help on getting modbus functional on your SLB.
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No, I missed this one, thanks. This is just what I was looking for.
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