Spindle stopping at 10,000 rpm?

I'm back having problems with a friends Chinese CNC. The spindle (1.5kw water cooled 80mm) seam to stop when I try to make it go over 10,000rpm. If I set it in fusion cam to do 10,000rm its fine however if I set it to 12,000 it does not start. If I set it to 10,000 then start the file and then up the spindle speed in nc studio it also then cuts out so I am thinking its on the vfd side of things.

I don't have much in the way of instructions for the machine so finding it hard to figure much out, any ideas? The pic bellow shows the vfd I'm not sure even what one it exactly is.

I am not familiar with the VFD model, you'll need to read the manual for details, but that sounds very much like the ramp-up time is set too short and you need a slower ramp-up setting in the appropriate parameter(s)

I wouldn't of thought ramp up time would cause the issue, especially since it seems to get up to 10k OK.

However, we really need more details.
VFD make/model (there must be a sticker on it somewhere..), what software/controller is the machine using, and how is the VFD interfaced to the controller (0-10V or Modbus).
Any messages shown on the VFD when the spindle stops?

OK I'll have to see if I can find out more about the vfd but like with most Chinese stuff there is little to no instructions that came with it. Will unbolt it and take a look on the back when I'm back there on Monday.

The machine is running on nc studio which im only just figuring out I'm not sure what the other components are but again will try find out more on monday . many thanks

When you're there, try and work out a wiring diagram, and get some photos of how things are connected.

If you can work out the activation signals to the VFD, see if they remain active when the spindle stops. There is the possibility that the controller is stopping the spindle when too high a speed is commanded, so knowing what the activation signal/speed set signal are doing narrows down to if it's a controller issue, or a VFD issue.

10,000 revs divided by 50 hz equals 200.

First check on the plate that the VFD can actually go to 400 hz, many can't. I have a couple here than can only go to 150 Hz and 200 Hz.

Then check inside the parameters for Max Hz isn't set to 200 instead of 400.

cheers many thanks will have a look for all this tomorrow and report back fingers crossed its not to complicated and can be sorted as I want to cut some corian.

OK. So I'm sure it is machine side of things as I does it without any file loaded. Trying to find a manual is proving hard but I found one for sale saying it does 400 hz just not sure if its set to that.

Quote:

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Originally Posted by charlieuk

OK. So I'm sure it is machine side of things as I does it without any file loaded. Trying to find a manual is proving hard but I found one for sale saying it does 400 hz just not sure if its set to that.

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Just don't change any parameters without knowing what you are changing. If you start experimenting without manual and just guess you may fry the VFD or the motor. Perhaps Mactec54 can maybe help you over on CNCZone.

Find a seller that sells it on aliexpress or ebay, contact him and ask him for the manual. That simple.

Where did you buy that spindle from?

Or download a typical Chinese spindle manual, al is same same, with small differences. Find there the max frequency and max it to 400hz.

here is the manual in Russian https://docviewer.yandex.com/?url=ya...c=58b415ee5c3b , lame but you can use copy past in google translator and get the important stuff


from there:
List of parameters 5.2 function
Function number Setting range Value Function Description Default Comments
P-000 Frequency setting mode selection
0. Control panel ▲, ▼ to set;
1. Panel Potentiometer
2. Potentiometer FV terminal or setting 0-10;
3. FI terminal installation of 4-20 mA signal;
4. Control Panel ▲, ▼ set, if it is detected from the terminal to the FV potentiometer or 0-10V
The signal will automatically switch to 5;
5. Potentiometer terminal FV or setting 0-10, if detected panel ▲, ▼ work
Automatic switching to 4;
4 √
P-001 Running command selection
0. Control panel (Forward rotation start, reverse start, stop);
1. Control Terminal (forward / stop and reverse / stop);
2. Control Terminal (start / stop, forward / backward);
3. Control Terminal (forward rotation start, reverse start, stop (NC));
4. Other methods that automatically adapt;
5. Control Terminal (forward rotation start, reverse start, stop (normally open));
4 ╳
P-002 Stop Mode
0 Deceleration stop;
1. Free stop;
2. DC brake immediately;
0 √
P-003 prohibits the reversal of the engine
0. This allows the engine to the contrary;
1. Disable the motor reversal;
0 √
P-004 keyboard to prohibit the reverse rotation start
0 Enable reverse keyboard start;
1. Prohibition of the keyboard reverse start;
1 √
P-005 Start frequency 0.0-highest operating frequency of 1.0 Hz √
P-006 Start delay 0.0-60.0 seconds to 0.0 seconds ╳
P-007 Reserved
P-008 automatic voltage sensitivity of 0 (lowest) to control 3 (high) 1 √
P-009 Slip compensation 0.0-5.0Hz 0.0Hz √
R-010 carrier frequency of 1000 Hz-12000Hz. When the carrier 999 by using a set of △ ╳
The frequency of P-011 achieves a set 0.0-2000.0Hz 0.0Hz √
Selection of P-012 analog output
0 Analog frequency;
1. Analog current device;
2. The analog voltmeter;
0 √
Twenty three
P-013 Analog Output Gain 50-200% 100 √
P-014 Power Selection Show
0. Frequency (H, F);
1. Output current (A);
2. The bus voltage (U);
3. Approximate mechanical speed (r) = output frequency * P-015;
4. PID set value (y);
5. Inside the converter heatsink temperature (C);
6. The output voltage (U);
7. The counter value (J);
8. Feedback PID (L);
0 √
R-015 speed factor 0.01-99.99 30.00 √
User preferences Password P-016
0. Do not set;
Others, password settings, change the settings you must enter the value in the P-140;
0
P-017 0 memory frequency. No memory; 1. Memory; 2. memory before starting frequency; 1 √
P-018 is the instantaneous power failure restart 0. Invalid; 1. Track your speed; 2. Restart; 0 √
P-019 just restarted after a crash 0-10 times 0 √
P-020, and then start waiting time of 0-60 seconds, 10 seconds √
P-021 braking initial voltage
220 Inverter: 350-400V 360V √
380 Inverter: 650-700V 660V √
P-022 anti-overvoltage during deceleration response point
220 Inverter: 350-450V 400V √
380 Inverter: 650-750V 700V √
P-023 anti-accelerate in response to the points 110-150% over the nominal current of the inverter 130 √
P-024 anti-overcurrent response at constant speed at 110-150% of the rated inverter current 150 √
P-025 drive rated current ◎ △
P-026 motor rated current 20-120% of the nominal drive current 100 √
P-027 motor rated voltage
Model 220: 50-450V 220 ╳
Model 380V: 50-450V 380V ╳
P-028 Rated motor frequency intermediate frequency of 50.0 Hz -2000.0Hz ╳
P-029 intermediate voltage Minimum voltage -99% when the intermediate voltage is equal to the minimum voltage using torque boost 0 ╳
P-030 intermediate frequency 1.0 Rated frequency 12.5 Hz ╳
P-031 low voltage 0- intermediate voltage using torque boost 0 ╳, when the intermediate voltage is equal to the minimum voltage
When P-032 0-30 torque increase (due to different types of aircraft), the intermediate voltage is less than or equal to a minimum effective voltage △ √
P-033 the maximum operating frequency of the lowest operating frequency -2000.0Hz 60.0Hz √
P-034 low operating frequency of 0.0 Hz is the maximum operating frequency of 0.0 Hz ╳
P-035
High frequency (PID maximum
Setpoint) corresponding analog
To come in
0-100% 96 √
P-036
Low frequency (PID minimum
Setpoint) corresponding analog
To come in
0-100% 2 √
P-037 Reserved
P-038 frequency upper limit frequency -2000.0Hz 60.0Hz ╳
P-039 0.0-frequency limit the upper limit frequency of 1.0 Hz √
Twenty four
P-040 braking time 0.0-25.0 seconds 0.0 seconds √
P-041 DC braking torque 0-30 (due to different aircraft types) △ √
P-042 brake starting frequency Hz 0.0 -25.0 3.0 Hz √
The regulator R-043 Rotary
0. prohibited keyboard operation jogging
1. Allow the keyboard turning operation
1 √
P-044 Rotary frequency low operating frequency - maximum operating frequency of 5.0 Hz √
P-045 Acceleration Jog 0.05-650.00 seconds △ √
P-046 cooks

There's photos of the manual at -
https://get.google.com/albumarchive/...slEh1HftK6nvSV

Looks like X1-4 are used, however there doesn't appear to be anything that controls the speed. The ribbon cable goes to the remote display, and X terminals are basic inputs. You'll need to go through the menu, and find out what the X terminals are configured to do.
Probably worth testing with a multimeter, and see if any of the X input statuses change above 10'000rpm.

cheers many thanks for that I will go through it now!

Did you try what Mactec54 on CNCZone proposed?

I looked at the settings and they do appear different, I was just waiting for a reply to if I should change them. Not knowing to much I want to double cheque before I blow anything up! I put a tacho on it today and at 10000 it was only reading 9000

Quote:

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Originally Posted by charlieuk

I looked at the settings and they do appear different, I was just waiting for a reply to if I should change them. Not knowing to much I want to double cheque before I blow anything up! I put a tacho on it today and at 10000 it was only reading 9000

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Mactec54 has a huge collection of manuals, if you ask him nicely maybe he will direct you to a pdf file or mail one to you. If there is a manual for "your" VFD, then you are safe, otherwise you are in the dark... and the options are: take a chance or use it as it is. I would take a chance if it was mine, after all, what is the worst that can happen? The VFD or the motor, or both gets fried. Not the whole world, and in that case at least I'd know. :watermelon: