Magic, that's steered me in the right direction, thanks!
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daleyd
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If you PM me your email I can prob send you it direct if you want?
Thanks, I got it downloaded from the Mitsubishi site.
Kram
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MetalMonkey
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Has anybody used the WEG units? - they seem competitively priced compared to the eBay ones for a basic unit, if you don't require an analogue input.
winchman
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Usually last years model but much better price, nice people too
https://www.newton-tesla.co.uk
They can also repair them
https://www.newton-tesla.co.uk
They can also repair them
Hopefuldave
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That's one of the things I really like about the ABBs I have - meaningful screen, meaningful manual, e.g.:
Also... the 3-phase 415v input are easy to hack to get 415v from 240
Dave H. (the other one)
daleyd
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I did a project at Springfields using those, but only interfaced with them from the DCS system so had very little to do with the drives themselves. They looked OK, pretty much all manufacturers seem to have settled on the same format for their displays/front panel. I quite like the Schneider (optional) larger graphical interface with the large round navigation wheel. Lenze were probably my least favourite in terms of front panel (They had a removable keypad), horrible and confusing menu system, though the software wasn't too bad.That's one of the things I really like about the ABBs I have - meaningful screen, meaningful manual, e.g.:
View attachment 224748
Also... the 3-phase 415v input are easy to hack to get 415v from 240
Dave H. (the other one)
Looking for a VFD for my pillar drill. I
have found a second hand powerflex 4 1hp which doesn't seem to have the braking option (no dynamic braking ibgt according to the manual). Not sure this is really needed for the drill press? This just allows the drive to brake the motor? Maybe for a lathe?
or an Chinese one off eBay?
Would like to keep the cost down unless good reason otherwise.
EDIT: Also see you can pick up Mitsubishi D720S for decent money also.
have found a second hand powerflex 4 1hp which doesn't seem to have the braking option (no dynamic braking ibgt according to the manual). Not sure this is really needed for the drill press? This just allows the drive to brake the motor? Maybe for a lathe?
or an Chinese one off eBay?
Would like to keep the cost down unless good reason otherwise.
EDIT: Also see you can pick up Mitsubishi D720S for decent money also.
Last edited:
grim_d
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Sorry to butt in but those with experience of Huanyang vfds...do I need to over rate the vfd for the motor?
I want to have speed control over a 2.2kw motor and 380v 2.2kw ones are easy to come by but 3kw ones are a bit more scarce.
I'm planning on sticking with 400v even when I move workshops which is why I want the 380v version.
I want to have speed control over a 2.2kw motor and 380v 2.2kw ones are easy to come by but 3kw ones are a bit more scarce.
I'm planning on sticking with 400v even when I move workshops which is why I want the 380v version.
Agroshield
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Are you looking for variable speed or just the ability to drive a three-phase motor?
I have heard good things about the most basic Eaton ones from Inverter Drive Supermarket. I do not know how the price compares to your own suggestions.
timgunn1962
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Smegger: If it’s just for drilling, you should be fine without the dynamic braking. If the drill doesn't/didn't originally stop quickly enough, you might find it's worth trying the DB, but it doesn't seem like a common problem
If you are intending to be lazy and do most stuff on a single pulley setting, it might be worth going for a Sensorless Vector drive. These seem to give a noticeably better low-speed range, though the reality is that you'll need the torque multiplication from a belt/gear change for drilling big holes and you are unlikely to do away with changing belts altogether. That said, I have seen a pillar drill retro-fitted with a 3 HP 2-pole motor and single-speed pulley setup used with a SV VFD by a guy in a wheelchair.
Grim_d: I've not had any reports of problems with 2.2 kW HuanYang VFDs running 2.2 kW motors on belt grinders used for knife making. They tend to run a relatively light duty cycle though. I'd be inclined to oversize the drive if your application will be more than intermittently seeing full-load on the motor.
If you are intending to be lazy and do most stuff on a single pulley setting, it might be worth going for a Sensorless Vector drive. These seem to give a noticeably better low-speed range, though the reality is that you'll need the torque multiplication from a belt/gear change for drilling big holes and you are unlikely to do away with changing belts altogether. That said, I have seen a pillar drill retro-fitted with a 3 HP 2-pole motor and single-speed pulley setup used with a SV VFD by a guy in a wheelchair.
Grim_d: I've not had any reports of problems with 2.2 kW HuanYang VFDs running 2.2 kW motors on belt grinders used for knife making. They tend to run a relatively light duty cycle though. I'd be inclined to oversize the drive if your application will be more than intermittently seeing full-load on the motor.
Anguz
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That's one of the things I really like about the ABBs I have - meaningful screen, meaningful manual, e.g.:
View attachment 224748
Also... the 3-phase 415v input are easy to hack to get 415v from 240
Dave H. (the other one)
got any details dave on the 240v hack?
Its a 10 speed drill so I guess I shouldn't really need variable speed but I guess it would be a nice option to save changing belts if its a light job.
I was hoping to keep things around £100 if possible.
0.5hp motor on the drill, I assume there is not much point in overrating the VFD in this instance? I would need another VFD for any new gear I buy down the line anyway and its a personal workshop so will be on a low duty cycle.
I see some really good deals on a Mitisibushi D720S - 1.5KW sub £100 any good reason not to take a punt on one of these?
I was hoping to keep things around £100 if possible.
0.5hp motor on the drill, I assume there is not much point in overrating the VFD in this instance? I would need another VFD for any new gear I buy down the line anyway and its a personal workshop so will be on a low duty cycle.
I see some really good deals on a Mitisibushi D720S - 1.5KW sub £100 any good reason not to take a punt on one of these?
daleyd
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Mitsibushi are excellent, proper industrial inverters. If you can get one that's new or lightly used you won't go far wrong. I'd agree with oversizing if going down the Chinese generic route, but something like the Mitsibushi or (insert any proper industrial inverter make here) then you probably don't need to. A 1.5 kw one for that price is well worth getting.
Seadog
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With my first foray into using a VFD, I was advised some years ago by someone at Direct Drives, always to overrate the drive. This was when I was having issues with one of their drives, rated 3/4hp, running my 3/4hp motor.
daleyd
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It's not wrong - though using decent kit should negate the need to do it - the "right" sized vfd should be able to supply 200% of the rated current for a few secs and 150% for a minute or more (depending on make of course). In work it's not often I see a drive much more than 1 size above what the motor is, if at all. I guess at lower power the differences may be magnified.
MetalMonkey
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I have seen recommendations by manufacturers to avoid going much beyond one size up or down when matching a VFD to an application.
One thing to be aware of if purchasing second hand or where they have been on the shelf for sometime is the capacitor reforming process.
One thing to be aware of if purchasing second hand or where they have been on the shelf for sometime is the capacitor reforming process.
daleyd
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One other thing to note is the current able to be supplied by the vfd is generally a more reliable indicator of what motor it's capable of running, rather than HP or KW ratings. Mitsibushi, for example seem to have a low HP rating but the rated current is higher - their 0.75 kw drive for example is rated for 5A - which should be good for a 1.1 kw motor.
