Invertor required

**cropwell** · 12-01-2019

Originally Posted by m_c

It's not specifically a Warco model. Like lots of Chinese built machines, it'll be produced by a factory who will stick whatever logo you want on it, and give you a few different specification variations. Plus as it uses a pretty conventional naming convention (Gear Head 14" swing 40" between centres), it may of even came out of different factories, with some copies better than others (aka Sieg/Syil).

A quick google for GH-1440A brings up Warco, ToolCo, ETS, and Acra currently supplying that model. I'm sure there will of been more suppliers over the years.

I mentioned Warco as it is green with ali info plates - as you say Chinese, probably from the weiss.com.cn stable. I can see why you are going for a VFD as £800 for a rotary converter - OUCH !

Cheers,
Rob

**m_c** · 12-01-2019

Originally Posted by cropwell

I mentioned Warco as it is green with ali info plates - as you say Chinese, probably from the weiss.com.cn stable. I can see why you are going for a VFD as £800 for a rotary converter - OUCH !

Cheers,
Rob

I'm pretty sure even Chester used to supply certain models in green, so I never mention makes unless it's clearly mentioned on the machine.

Rotary phase converters are pricey. The step-up transformer and motor are the big cost. The rest of the bits for a basic rotary aren't that expensive. A few big capacitors, and either a time delay relay (or voltage sensitive relay if you want to get fancy) plus some wire and terminals are pretty cheap.

I used to have a link to a website that provided kits, including the option for electronic capacitor switching, but I can't currently find it. I was always tempted to upgrade my rotary with it, to eliminate all the relay/contactor chattering mine does when I start the milling machine up.

**sheffstaff** · 14-01-2019

Hi again do you think that a Rotary phase converter would be better than a digital phase invertor the problem is that they are all so pricey to be able to run the dual speed motor.

**cropwell** · 15-01-2019

My guess is that the rotary converter would be more robust. The reason is that the two speed switching would mean, that to be safe with an electronic converter, would ALL have to be powered down before motor is reconfigured for the other speed, otherwise there could be a momentary open circuit or short to blow the output gates.

**sheffstaff** · 25-01-2019

Looked into the Rotary phase converter and this would be the best option for us because the set up will allow the use of dual speed motor and also the additional option to use other equipment at the same time if required. Just wondering if anyone has a Transwave rotary converter and if so is it for Sale? preferably a RT4 model.