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<blockquote data-quote="oexing" data-source="post: 152836" data-attributes="member: 1493"><p>In case you only got single phase 220 V supply, get a variable frequency converter. This is extremely comfortable for various reasons. I would not want to live without one, the speed control knob on the bedslide, plus direction change switch as well. So you don´t mess around in the gearbox of the lathe much, as speed change is quick under operation to your likings , can help with chatter conditions when parting off . Thread cutting is nice too, have a medium speed in the gearbox and turn down speed on the VFC for thread cutting. So for reverse the spindle changes direction very quick , in a smooth mode. You can set accereration and deceleration ramps within your desired times in seconds, very smooth and nice to the vee-belts and all. As frequency can be set up to 400 Hz in Chinese standard VFC you could speed up the lathe or any other electric motor to 24000 rpm - if you feel so.</p><p> Typically 220 V single phase converters get limited to 2.2 kW three phase for common grids. When you got single phase supply and more than 16 A 220 V , converters are available with 5 kW and 7.5 kW three phase. Have a look into Aliexpress pages , or Ebay, the Chinese types are great for typical uses. But get an electrician for assistance for finetuning all parameters for low down good torque. Factory settings are not optimised for your needs on the lathe.</p><p></p><p> Vic</p><p>[URL unfurl="true"]https://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20220224150701&SearchText=frequency+converter[/URL]</p></blockquote><p></p>
[QUOTE="oexing, post: 152836, member: 1493"] In case you only got single phase 220 V supply, get a variable frequency converter. This is extremely comfortable for various reasons. I would not want to live without one, the speed control knob on the bedslide, plus direction change switch as well. So you don´t mess around in the gearbox of the lathe much, as speed change is quick under operation to your likings , can help with chatter conditions when parting off . Thread cutting is nice too, have a medium speed in the gearbox and turn down speed on the VFC for thread cutting. So for reverse the spindle changes direction very quick , in a smooth mode. You can set accereration and deceleration ramps within your desired times in seconds, very smooth and nice to the vee-belts and all. As frequency can be set up to 400 Hz in Chinese standard VFC you could speed up the lathe or any other electric motor to 24000 rpm - if you feel so. Typically 220 V single phase converters get limited to 2.2 kW three phase for common grids. When you got single phase supply and more than 16 A 220 V , converters are available with 5 kW and 7.5 kW three phase. Have a look into Aliexpress pages , or Ebay, the Chinese types are great for typical uses. But get an electrician for assistance for finetuning all parameters for low down good torque. Factory settings are not optimised for your needs on the lathe. Vic [URL unfurl="true"]https://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20220224150701&SearchText=frequency+converter[/URL] [/QUOTE]
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