VFD 4KW 5HP 16A 220V Single or Three Phase Input to 3 Phase 0-3000 Hz Output Variable Frequency Drive Control Inverter for Spindle Motor CNC Speed Control

I am in the UK and needed to convert my 1974 Colchester Student lathe from 3ph (2.2kw) to run off 240v 1ph. I chose the 5hp (4kw) version Mollom VFD as the lower power ones were not available at the time. I have wired it so the lathe control stop/start/reverse go through the inverter to control it as original lathe set up. I emailed the seller and they sent me the parameters. I did have questions and the tech support (which I assume is in China) was answered with expert knowledge within 12 hours so next morning a reply was waiting. I am a professional user and wanted to use the lathe for a couple of months and can report no problems what so ever. If your converting your 3ph spindle machine then I highly recommend Mollom for the VFD. Due to the higher KW rating I assume I was able to set the acceleration and deceleration times to 3 sec and 2 sec respectively without any over load problems. A lower kw VFD may well have needed a braking resistor wired in. As a cautionary note, not all 3ph motors can be converted to 1ph VFD so do your homework first.

I'm only using this as a single to three phase converter, not using any of the speed control features. I originally bought a DPS converter but turns out they don't work for a lot of motors since they don't give full voltage on all three wires. The Mollom does and works great for my application. The downside is it's not plug and play. Tech support is great, I just emailed them my motor specs and they sent me the settings and it works great. The manual is lacking and so you pretty much have to email tech support, but I'm really happy with it.

Funciona muy bien, buena respuesta por parte del vendedor

Came on time and so far it’s working good. Very easy and convenient to install.

Great cost effective way of converting single phase to three phase. I used this drive on a 3hp meat band saw. The drive worked great once the proper parameters were programmed. 4 stars because the instructions were not that great. An individual with no prior controls experience would have difficulty determining how to program this drive. Other than the poor literature this drive is great and would buy it again.

I'm going to come back and write a more comprehensive review, however to get something published quickly, here is the skinny... My project to add variable speed to my metal lathe and get it working on my single phase power came out great and I am very happy with the VFD itself. Upon planning the setup and configuration, I noticed that there was a section of the instruction manual missing. This is the section which explains in practical detail each configuration setting. I consulted the Amazon questions section and found that emailing the seller might help. So it did. A person named Jeff emailed me 2 copies of the manual. One was in Chinese, and another translated to English. I originally thought that the Chinese version would be pretty useless to me, but read on. The Chinese to English translation of the manual seems to be done automatically via translation software. The software cuts off some of the tables and drawings, or positions the text awkwardly in relation to the referenced drawing or table. This is where the Chinese version comes in handy. The Chinese version would allow me to see complete tables and diagrams, as well as correctly positioned text. Then I am able to copy and paste the Chinese characters into Google Translate and get the full explanation. It turns out that some of the supplied translations are different than the Google translator. It turned out that Google was correct in the cases where I saw discrepancy. It was also the case where most of the supplied translations were correct and could be relied on. Although there were some issues with documentation, it was not a deal breaker. I finally felt confident enough to power up a s perform a bench test. To my surprise, all controls, inputs, switches, etc. worked as planned. I later learned that I would like a 6th input and seemed to only have 5. I emailed Jeff again, and I found he was apparently very skilled and familiar with setting up the VFD functions and parameters, even the more advanced ones. He was able to review my configuration and provide additional settings to allow me a 6th input (via using an AI as an S input). This allowed me to configure the functionality of my lathe exactly how I wanted. I highly recommend this product for the budget minded person, however please know that the documentation is not quite complete, and that the support resource is resource is excellent and can/will make up for that deficiency. Finally, I will mention a small quality issue... The binding posts for the grounds are not strong enough. Tightening them down too much can loosen them on the back side of the pc board (probably a nut) to where you cannot remove it. I had to work around this by splicing a new wire into the now permanently attached one in the motor ground post. This is a minor niggle, and probably due to my overtightening it, but a good point of warning nonetheless. I hope this helps you make a purchase decision. Let me know if you have any further questions. I also recommend reaching out to Jeff (you can find his email address in the question section) if you have any pre-purchase questions or to request the full versions of the manual.