Hello, my table is just started having issues with the y axis drives opposing each other. Both drives work, but when adjusting the y axis in controller one of the drives starts in the opposite direction. Any suggestions on why this started and how to fix it?
Could be docs:blackbox-x32:faq-identify-motor-coils [OpenBuilds Documentation] - loss one of the 4 motor wires continuity throughout - sudden unexpected direction changes are quite likely wiring related - recheck as per the procedure in the link
Hi Peter, thank you for the feedback. After thorough investigation I found a bad contact on the drive wire connection. Repaired, what is the best way to true the table now that each leg is off? I was going to use a ruler and disconnect one of the y drives and adjust until both legs are at the same distance from the start of the table shoulders.
Peter, on another topic and let me know if I need to start a new post. I noticed recently that after a project, my router remains on via the vfd at low rpm's ~300 when I shut it off. To resolve this I have to power the vfd down and back on. Is there a set point I inadvertently changed that is causing this?
Sounds like your VFD setup skipped the MIN FREQ parameter. You want to setup Min Freq on the VFD to 120Hz (7200RPM) so its shutdown from 0-7200 rpm, then runs from 7201 to 24000 RPM only. Refer VFD manual, they all call it something just a little different, but look for a parameter that would prevent spindle from running slower than 120hz/7200rpm
excellent, I will take a look. Also, should I make another post about the table not making accurate tool paths or post here? I can upload my file and show a pic of the actual cut.
No real need, most of us mods, just browse through New Posts Recent Posts | OpenBuilds to see what to reply to, same thread, different thread, no real difference. Sometimes one thread for one persons somewhat related issues nicer than fragmented threads - nice to have the history and lead up and other discussions right there
Great, thanks. So, the picture is the result of a project created and code made on Fusion 360. Not sure what occurred as this was not the intent, seems the x axis became skewed the further away from zero y. I have included a screen shot of what the project should have looked like along with the resulting cuts and the code. Good day Peter, I may not have homed this project before starting, Could that have caused the cuts to offset?
Anyone, I reviewed the VFD set points and the advanced setting in controls. All seems set to logically stop the spindle from spinning based on what I have read. Here are my VFD setpoints, any suggestions on what I may have set incorrectly? I have a 220vac spindle water cooled 24000 rpm.
PD000 = 0 ; parameters left unlocked, set to 1 to lock PD001 = 1 ; required to use Shapeoko’s PWM signal as the activation trigger (default was 0=manual) PD002 = 1 ; required to use Shapeoko’s PWM signal as the RPM input (default was 0=manual) PD003 = 400 ; main frequency (the speed the spindle WOULD start off at if PD002 was set to 0, so irrelevant here) PD004 = 400 ; base frequency as rated on my spindle (default was 50) PD005 = 400 ; max frequency the VFD will allow (default was 50)
PD006 = 2.5 ; default value for Intermediate Frequency (Hz) PD007 = 0.5 ; default value for Minimum Frequency (Hz) PD008 = 220 ; default value for my 220V spindle PD009 = 15 ; Intermediate Voltage PD010 = 8 ; Minimum Voltage PD011 = 0
Manual should say, otherwise unfortunately would be better to ask the VFD Supplier about that if the manual is not clear. They should know (and support) their products What VFD is it? Is it one we have a community contributed writeup for? Bottom of docs:blackbox-x32:connect-vfd [OpenBuilds Documentation] that you can check into the writeup notes for? But at least - have yet to hear about a VFD that doesn't have that (pretty important safety feature for any motor drive, not just for CNC usage, pumps, industrial motors etc all use VFDs too) so just got to find out which parameter it is for yours Check shaft coupler grub screw on X-axis - make sure the grubscrew is on the flat of the motor, both grubscrews tight and then the clamp screw tightened. Same for the leadscrew end
Thanks Peter, I will reach out to the Huanyang. Complete newbee hobbyist so forgive the questions. But, does the spindle speed programmed in Fusion 360 placed in the logic to start/stop the spindle and ramp up/down? Likely not as I don't see it in the code. Can you point me to literature that can provide insight on how to add that in the controls software?
Did you check the docs, same model as we do have writeups for? Yes, it does on a correctly setup VFD Post a gcode file for review, should contain Sxxxx where xxxx = RPM
If that gcode is from fusion, its the wrong Post? Should be using docs:software:fusion360 [OpenBuilds Documentation]
Thanks Peter, will take a look. May explain the issues. I pulled the post from a source on this form not knowing it was not the correct one. are the instructions provided for the paid version of F360? I do not have the options per the first few steps. Also, is 360postbrbl.cps for a 3 axis router table? I don't have a 4 axis machine.
Peter, u da man. That resolved the vfd/spindle control; running the job now and expect this will likely fix the offset issue as well. Oddly though the spindle still spins slowly when it should be off. I have looked at all setting in the and dont know what could be off. Will do a general net search and reach out to the manufacturer. It spins at ~300 rpm and I fear it will overheat as I have to manually start the coolant when the table is on standby.
