Shopbot to Acorn conversion Spindle problems

[Wes910]

This is quite similar to my V7-4X, a couple things to check...

Main frequency reference - your 0-10v should be hooked to A1 (not where SB had the USB, that was for RS485). Reference section 3.7, 3.9.
Parameter b1-01 set to 1 for frequency reference.
Parameter o1-03 set to 2 should be for r/min units on the display. Reference section 5.10.

Other than making sure you have the 0-10v hooked up correctly and the frequency reference parameter b1-01 set, that should be all you need to change from the previous SB settings.


https://www.yaskawa.com/delegate/getAtt ... 060618.pdf

I think the o1-03 change is now displaying RPMS

However, When I do M3 S18000 the VFD is only showing 9000

Which would kinda make since due to the fact that the RPMs sound lower than before

[Gary Campbell]

USing a voltmeter across the Analog terminals on the acorn what is the voltage? What is the voltage when you disconnect the wires?

[cncsnw]

However, When I do M3 S18000 the VFD is only showing 9000

Remember that the VFD has absolutely no idea what RPM the motor is turning at; it only knows what frequency it is putting out.

The motor RPM for a given frequency depends on the number of poles (2, 4, 6, etc.).

Most general-purpose motors have 4 poles. With 4 poles, 60Hz yields 1800RPM (minus slip); and 300Hz yields 9000RPM (again, minus slip).

Many high-speed motors have just 2 poles, so that 60Hz yields about 3600RPM, and 300Hz yields about 18000RPM.

The V1000 inverter uses the information you give it, in parameter E2-04, to provide an estimated RPM for the output frequency.

What value do you have in parameter E2-04? How many poles does your motor have? If you cannot tell, post a readable picture of the motor data plate.

[Wes910]

However, When I do M3 S18000 the VFD is only showing 9000

Remember that the VFD has absolutely no idea what RPM the motor is turning at; it only knows what frequency it is putting out.

The motor RPM for a given frequency depends on the number of poles (2, 4, 6, etc.).

Most general-purpose motors have 4 poles. With 4 poles, 60Hz yields 1800RPM (minus slip); and 300Hz yields 9000RPM (again, minus slip).

Many high-speed motors have just 2 poles, so that 60Hz yields about 3600RPM, and 300Hz yields about 18000RPM.

The V1000 inverter uses the information you give it, in parameter E2-04, to provide an estimated RPM for the output frequency.

What value do you have in parameter E2-04? How many poles does your motor have? If you cannot tell, post a readable picture of the motor data plate.

E2-04 is set to "4"

[cncsnw]

That is a 2-pole motor.

[Wes910]

I Changed the E2-04 from 4 to 2 and now when I do m3 S18000 the VFD displays 18,000 however when I do m3 s9000 the VFD displays 6,000 and sounds like its spinning pretty low I also noted when I do s9000 I'm only getting 3.4v out on the acorn board???? I get 10.7 at s18000 When I unplug the signal cable from the board and measure while running at s9000 I get 5.1v

[cncsnw]

Try making a snubber network out of two 0.1 uFd capacitors and a 10 Ohm resistor, as seen on line 26 of the attached schematic, and installing it across the analog output terminals on the Acorn board.

[Wes910]

That look a little advanced for me

[tkbot47]

What is/was the "USB spindle RPM controller"? Do you know how it transmitted the speed request to the V1000? E.g. did it somehow generate a 0-10V or 0-5V analog signal that was wired to the A1 and AC terminals of the V1000? Or did it use some other method of speed control?

I think he's referring to the Shopbot modbus spindle speed control via USB

[Wes910]

Gary Recommend a 0.1uF 50V Cap. Between the settings and placing that cap. everything seems to be in working order

One Last thing tho-----
Previously when I had the shop bot controller hooked up the Fan on top the spindle ran anytime the control box was on- 24v

For some reason now even tho I have it hooked up to 24v the fan is not working????