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[Bridgeport Mill] Powering a Bridgeport in the UK

 

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Hi Peter,

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I live in Surrey UK. I have a Bridgeport series I with a 2HP motor. I purchased from Direct Drives a Speecom 7200MA plug and play inverter.

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I made no changes to the wiring inside the Bridgeport box and have been using the mill like that for the past 5 years.

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Have a word with Direct Drives, they are very knowledgeable and helpful.

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Hope this helps.

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Regards

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John Baldwin

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From: [email protected] <[email protected]> On Behalf Of Peter via groups.io
Sent: 16 April 2025 09:33
To: [email protected]
Subject: Re: [BridgeportMill] Powering a Bridgeport in the UK

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On Wed, Apr 16, 2025 at 04:41 PM, Clive Booth wrote:

Morning, Iam looking at running a BP series 1? 2 HP - the vario speed box not the earlier belt models, on an inverter.

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Who has done it outside of the States on what and how?

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The UK because it's a Adcock and Shipley electrical setup excluding the motor.

How because there's a 2 speed rotary switch before the motor and inverters, iam told, don't like that.

Inverter - only because I have 230 volt supply. My home work shop runs on a rotary converter which I am very happy with but would cost ?2k+ to replace and another?1k to supply.

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Finally I have both standard X & Y motors, wiring a separate inverter would seem the way to go but with 2 very small motors how and again what?

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Hi Clive, I¡¯ve done it on mine in Australia. 240 V in the VSD, original forward/reverse switch wired into the VSD via a cat 5 cable, can control the speed via the VSD or via the vary drive lever.?

Power to the main control box is also 240V single phase which runs the Y travel motor via the 110V transformer.?

Peter
 

Another vote for the Drives Direct plug and play inverter. Well over 10 years on my 7 hp unit powering my whole workshop. 10 machines altogether running either singly or two at a time where the second one is usually either the shaper or hydrovane compressor. Handles the 2 speed motor on my wartime P&W Model B with its spleditly stamped punk oil immersed contactor controls, just fine.
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I bought the smoothing unit primarily due to worries about radiated electromagnetic interference. I'm not sure if I really believe the tales of worrying amounts of electromagnetic radiation escaping if you have long wires between VFD box and machine but the smoothing inductors will certainly cut all the nasty high frequencies. Loosing the sharp edges, high dv/dt, is probably not a bad thing when it comes to old motor internal insulation which really wasn't designed for that sort of thing. Also wanted to be ready if I ever decided to go CNC
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Clive

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