Final Build converting 120V single phase bench grinder to variable speed belt grinder using a VFD

This is a continuation of the previous video exploring the possibility of using a VFD with 120V single phase input power and producing 120V 3 phase output to drive a permanent split capacitor (PSC) AC induction motor 1750 RPM in my grinder. This is my final build configuration in converting the grinder to use a 2x36 belt grinder attachment offered my multitool. The VFD is programmed to drive the motor winding direct from the VFC. The start/run capacitor is totally removed. The VFD controls both Frequency and Voltage to drive the motor with variable speed from 200RPM to 3000 RPM.
Multitool belt grinder: multitoolgrind...
Low speed bench grinder: www.kmstools.c...
VFD unit: www.amazon.ca/...

[@adampoll4977]

Heya, easiest way to compress the spring to change sanding media is to just squeeze the belt. Easier than pushing down on it.

[@prairieedgeservice]

I received a notice that Glen placed a comment but have no idea where it is located. The notification read "Glenn commented: "Curious, have you plugged a Kill-A-Watt in to see what your Watt/Amp draw is with this configuration? I'd be curious to know what your reading are."
Glen, Here are the various readings based a no-load free running speed.
Killo-Watt VFD Display
Watt Volts Current | RPM Frequency Hz Voltage Current
0 123 0 0 0 0 0
48 122 0.66 500 16.8 33 1.28
71 122 0.66 1000 33.4 62 1.79
86 122 0.79 1500 50.1 92 2.36
90 122 0.82 2000 66.8 109 2.45
89 122 0.80 2500 83.3 109 2.07
86 122 0.79 3000 100 109 1.75
Current is amps

[@netsmurf]

Do you sell those angle guides?

[@prairieedgeservice]

Hi Jim, I don't anticipate selling any of these. These are simply prototype 3D printed parts using materials (magnets) that I have kicking around. Secondly, I think that every multitool will have angular variance between the shield and platen angle. Thereby eliminating the possibility of commonly produced guides.