Mitsubishi D700 Inverter

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Mitsubishi D700 Inverter

This topic has 10 replies, 4 voices, and was last updated 30 July 2013 at 21:34 by Sub Mandrel.

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29 July 2013 at 21:09 #125682
Alan .204
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@alan-204
Has any one got one of these I'm struggling trying to figure out how to use the dam thing, should i be trying to set the power to the motor so it's the same each time i turn it on, also can't seam to slow it down and speed it up, I can only do it changing the Herts to the motor. is that what you should do, can't believe how complicated it is, HELP

Alan.
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29 July 2013 at 21:09 #22740
Alan .204
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@alan-204
29 July 2013 at 21:19 #125684
Sub Mandrel
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@submandrel
Hi Alan,

Inverters are not 'out of the box' devices, unless you go with a supplied setup and control box. It took me a week to get mine to do exactly what I wanted, partly because I had changed a default value and forgotten and the effect of that was not what I expected.

I have a different inverter to yours, but yes, the frequency of the supply is what sets the speed of the motor. Starting speed will depend on the position of the speed control unless you don't use one and set a default speed instead. It should be possible to set it to ramp up gently on start and stop.

Neil
29 July 2013 at 21:21 #125685
John Coates
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@johncoates48577
I have the E700

Turn it on. Press PU/Ext to switch to PU. Turn the potentiometer to the Hz value you want to run at then press RUN. Press STOP to erm, stop

Ideally you should read the manual and set the parameter values to match your motor but if you do a reset to defaults and do the above you should be fine as I find them reliable "out of the box"

Mine is on a shaper so is run at 50Hz but on my lathe and mill I use the potentiometer to vary the Hz to give me the spindle speed I want. Exceeding 50Hz is overdriving the motor and how far you go is dependent upon the bearings. I've only gone to 120Hz on the mill for a small endmill job

I made a chart up in 2.5Hz increments for each machine but if you do 10, 20 and 50Hz everything can be worked out as the RPM at 20Hz is double 10Hz etc

John
29 July 2013 at 21:24 #125687
John Coates
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@johncoates48577
Oops just find I disagree with Neil about their "out of the box" reliability

The fine tuning is in setting the paramaters correctly
29 July 2013 at 21:31 #125692
Sub Mandrel
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@submandrel
Hi John,

I did say 'unless you go with a supplied setup'. The problems come if you do anything that isn't 'vanilla' such as adding an external control box (note that vendors of control boxes don't put their circuits on the web…)

By the way. 99.9% of motors are specced for 50/60 Hz so 20% overspeed will do no harm. If you set the default frequency parameter, then the inverter should run at constant power above the default.

These are fiendishly clever things, they can even work out how hot the motor is getting when you run it slow under changing load and stopping and starting!

Neil
29 July 2013 at 21:37 #125693
John Coates
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@johncoates48577
Hi Neil

I bought a custom made control box from Drives Direct and they were very helpful wiring it into my lathe inverter. The one on the mill was a second hand from ebay Omron V1000 which came with a wired in control pod with stop/start/pot controls

I've always been able to find a manual in PDF on the web for all three of my inverters and found one for Alan's as well

John
29 July 2013 at 21:43 #125695
Alan .204
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@alan-204
It seams that's how I have been running it the same as John run's his, I looked through the destruction's and it's bent my head, all these parameters are a PITA, simple rules in my book all I want to do is alter the speed and keep the same power, I will soon get used to it, one question the foot break on the drill or should i call it an electrical breaker at the moment it's disconnected if I wire it back in through one of the phase wires would it work.

Al.
29 July 2013 at 21:52 #125697
John Coates
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@johncoates48577
Alan

I don't change/set many parameters – the ramp up/down time, max Hz (100 or 120), motor rating in Amps or Kw, internal or external control (from memory)

Can't comment on the foot brake. Everything I have read says to use the inverter to start/stop the machine and not on/off switches

I find that the inverter runs at the Hz I last set it to when I used it

Good luck

John
29 July 2013 at 23:14 #125704
Dennis R
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@dennisr
Alan

Any switches should be on the supply to the invertor, NOT between the invertor and motor.

Between the invertor and motor should be solidly wired.

Dennis
30 July 2013 at 21:34 #125771
Sub Mandrel
Participant
@submandrel
On my inverter (IMO Jaguar Cub) you can program an input for an emergecy brake switch which will give a rapid stop (i.e. with a big thud!) as against the gentle ramp down with the normal stop switch.

This does involve getting to understand the manual (I did find the Mitusubishi one but cancelled the download when I saw it was about 13 MB).

Neil
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