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Hi Len Some VFD’s are noisier than others so you seem to have made a fortunate choice It also depends on the motor’s history The Emco motor tends to run hot so if it was previously in an

Maybe I've been living dangerously, but I've run that same motor (on a VP10) from a VFD with no load filter for 10 years with no hint of a problem. I also have a VFD on an old BP clone mill of similar

Hello Guys, Does anyone live in North Florida or South Georgia in the group? The past 15 years we have been in the South and away from friends and family where I grew up and worked in Western NY.

Hi Ross All noted , and thanks for the sine filter link My “how it works” comments were directed more to Sierra The theme of this discussion has been whether EMCO motors can be damaged by use with

Hi Vedran Don’t know what the B-H curve for Microwave Oven Transformer looks like . It would make sense to operate near saturation as that would give a constant voltage feed for the magnetron Maybe

I have an original (old) emco 240v 3ph motor which I am running via a vfd and I don't want to wipe out the motor's insulation from the vfd spikes. It is an intermittent us hobby machine, from project

Thanks Carvel, but my question was to Sierra as to the problem he wants to resolve by using a load filter, not what this does.? I'm well versed in principles of filters (reactor/chokes, sine filters,

I'd chisel or hacksaw-off the secondary... 2000V is not something one just shakes off and hobbyists sometimes tend to keep kludges outside of appropriate enclosures. No need to press out what is left

The goal is to have the magnetic fields linked. Chris P ________________________________ Sent: Sunday, March 23, 2025 12:47 PM To: [email protected] <[email protected]> Subject: Re:

Hi Bill An interesting idea ? You would just need to find 3 transformers with intact primaries with the same inductance Coincidentally this might even be in the correct ball park ? I have a

Sierra, If you’re looking for cheap, I have a DIY choke idea for you. The concept design came from a project I was researching to convert a straight AC welder to DC output, so the purpose of the

Ryan, profile shift selects a different section of the same cycloid curve that defines the tooth shape. So the module, pressure angle and tooth count remain while the center distance changes, and

Hi Sierra and Ross Right . . today is Sunday so let’s see what we can do ? Firstly to recap for Ross as to why we want to do this The output of a VFD is a square wave of full voltage but varying

*Please note this explanation works on concept level, and is not always what is actually happening.* VFD itself doesn't produce voltage spikes, it turns the power fully on and fully off very quickly

Eric You'll obviously make your one choice in the end, but if it was my machine, I'd keep the current leadscrew arrangement if possible. I think I went looking once and decided a ball nut should fit

Hi Jay That ties up with the info which I have from RIFA capacitors and other The automatic feed with its gearing and inertia can present a significant load even without actually driving a cut , and

Hi Carvel, I was always planning on running the motor at constant speed, and I had forgotten about the capacitor option. I think I might try that in the first instance, and see if I'm happy with that

I don’t want to fry the old/original Emco 220v 3ph motor running it on my vfd. It is an intermittent use mostly hobby machine, which goes from project to project as needed and sits between. Sierra

Sorry.? Maybe I should have started by asking what is the problem are you trying to resolve with a load reactor/filter? Ross

Ha, this now has me as more confustercatededed than I was before…. except on tuesdays unless it’s Friday, with an added, better better not and soon? So much to consider and it’s hard to know