matsuura mc500v mill - VFD advice for spindle motor 80's yaskawa UAASE-5K)

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3 years 3 months ago - 3 years 3 months ago #276295 by camb0
After checking through the BD600 manual I worked out I had the 4-5 base motor parameters, I could probably do with some more data but it was enough to make the purchase decision.
I've had a play with it and managed to get the motor running in VF mode and then later in torque vector mode.  Torque vector mode has some issues at lower frequencies/speeds, it seems to get some unstable jolts now again, not sure how to smooth that out but that's something I can work on.  
I was going to try the modbus connection next while I'm testing subsystems (will see what Andy says re the realtime comms).
Anyhow here's the settings I used for the BD600 to get the spindle running (might help someone else).  It uses the control panel potentiometer to set the frequency/speed, I didn't do the last command to change the display to RPM as I couldn't quickly work out how to set the value.
Code:
F00.28 1 Factory restore F00.28 2 Clear fault file F00.11 2 Frequency Reference Resolution (do this if you run low Hz like, and do this first otherwise you have to redo the motor settings) F00.00 2 Speed Control Mode start with V/F (=2), later will try torque vector control (=0) F00.01 0 Command Source Selection F00.03 137 Max Output Frequency F00.04 137 Run Frequency – Upper Limit F00.05 6.29 Run Frequency – Lower Limit F00.06 10 Frequency A command selection, 10 potentiometer, later will try RS485 F00.10 10 Keypad Setting Frequency, start above min speed. F00.12 10 Acceleration time s F00.13 10 Decceleration time s F00.17 8 Carrier frequency F02.01 5 Motor Rated Power: (Ensure that you choose the correct motor power rating for your spindle) F01.01 10 Startup frequency F01.05 1 Accel/Decel mode 1= S curve startup F02.00 0 Motor type selection F02.01 5 Rated power of async motor 1 F02.02 137 Motor Rated Frequency F02.03 4000 Motor Rated Speed F02.04 200 Motor Rated Voltage F02.05 32 Motor Rated Current: (Ensure that you choose the correct motor current for your spindle) F03.28 137 Upper frequency limit of forward when torque control F03.29 137 Upper frequency limit of reverse when torque control F04.02 50 Cut-off frequency o fmotor 1 torque boost F07.03 11 If you wish to change the VFD display from Frequency (Hz) to RPM, use the following parameters F07.12 0 Decimal Points for Speed Display
Last edit: 3 years 3 months ago by camb0. Reason: Fixing formatting

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3 years 3 months ago #276299 by andypugh
Modbus itself is realtime, but most LinuxCNC implementations use a USB dongle and a user-space (non-realtime) interface program.
Ocasionally, if the PC stalls, you might see a delay in the transmission of a speed change message.

For a mill this is probably not very important, except during rigid-tapping operations.

It _is_ possible to connect Modbus to the serial UART (smart serial expansion port) on the 7i76 using a newly-written driver system, and that would work in realtime, but is pretty much untested "in the wild" still.

I think that using the built-in spindle inerface on the 7i76 probably makes the most sense.
The following user(s) said Thank You: camb0

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3 years 3 months ago #276300 by camb0
That makes a lot of sense, thx.

So my options are:
-7i76 Analogue 0-10v
-USB-485 dongle -> modbus VFDMOD (and put up with some delays)
-Alpha/Beta test the new module

I'm not sure I'll end up rigid tapping with the mill, so the realtime nature of the speed control may be less of an issue. However I do like that with the Modbus a number of other VFD params are available, however would I use them long term? I don't have the experience to tell as yet.

I assume this is the new driver mentioned in this thread:
forum.linuxcnc.org/41-guis/49616-mesa-modbus-and-pktuart#276298

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3 years 3 months ago #276312 by spumco
0-10v and modbus are not mutually exclusive.  You can use 0-10v & digital inputs to control spindle on/dir/speed, and still use modbus to get information from the VFD (amps, temp, actual freq, etc.).

Eliminates potential latency during time-sensitive operation (tapping), but you don't have to deal with an analog signal back to LCNC for spindle load.
The following user(s) said Thank You: tommylight, camb0

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2 years 11 months ago #284742 by Druid_ON
Possible solution
jelinux.pico-systems.com/resolver.html

Also you could convert the v-belt drive to a timing belt drive which would give a dead accurate spindle speed needed for rigid tapping.

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2 years 11 months ago #284743 by Druid_ON
Can you use a rotary phase converter to get 3 phase 220VAC fron single phase 220VAC?

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