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My replacement motor is still running OK. A really good improvement. Regarding the pulse wave modulator. I have around 10 to 12 spare ones. The problem with a variable speed drive VSD controlled by a PWM is that the torque is limiting at low speed. You can mechanically check this with the calculation Power = 2 x Pi x RPM x Torque. Then use substitution for Power = Volts × Amps. Hope this Theoretically answers why I do not use a VSD driven by a PVM. The torque is just two low at low speed.

Thanks for browsing, yes we do! Have a great day. Graham

If I recall correctly it was bright bar EN3, the tap was a little rough. However it only needed to work once. The brass collar was for my cross slide repair. There is a video of that also. Regards Graham

@@3in1machining1 thanks for the quick reply. So low carbon mild steel, quench hardened and tempered. I should have looked at the sparks coming off your cut saw they shoot like its mild steel. Looks like a fun project to try, great video none the less. Keep it up

Your are welcome. Pleased you enjoyed the video.

Its magic! Not everybody wants to look at the chuck rotating, & rotating. Whereas others want instant gratification and see the end result. What are your thoughts and preferences?. Graham

@@3in1machining1 I meant lathe chuck ie could you hold something still in the lathe church and then do milling operations on it. Sorry I should have explained better. Thanks

Arrr, understand... the reason the chuck is started is that it drives the auto feed on the cross slide and saddle. Alternatively you can mill manually. I prefer to use the auto feed as it gives a better finish. But the lathe / mill is an hobby unit. So the finish is mediocre anyway.

Thankyou for subscribing, you are probably correct on the VSD with a three phase motor. Best Regards Graham

I genuinely believe that the original lathe motor is underpowered. I bought the machine due to its milling ability. You need to look a the 3 in 1 general description. Type 3 in 1 Machining General Description in You tube for a better understanding. Note there are better lathes available. Its all about cost. The good thing is that this lathe can cut metric and imperial threads.

You are welcome.

Amir you are mixing metric and imperial measurements together. Do you mean a 1" 1/8 BSW ? An 1"1/8 British standard with worth BSW has a thread pitch of 7 threads per inch 7 TPI. A 7/16 BSW has 14 TPI ? Also Metric threads are measured in pitch (pitch it the tip of one thread to the adjacent thread) Example a 24mm bolt has a pitch of 3mm

@@3in1machining1 you are right I need out size tap 26.8mm But standard size is 3/4 pipe size 26.5mm I need 26.8mm with 14 thread per inch

Plz reply or contact me

I hope that you will not disappoint me.

Type Zeus Precision Engineers Metric Data Book Chart Charts Reference Tables into Ebay.......this will help you.

VFD only works on a 3 phase motors.

@@samlogosz8422 Indeed, so use a PWM control board.

Thank you appreciated.

Pleased you enjoyed the content. I find it better just to get on with the job rather than stand in front of a camera and explain. You learn more quickly showing rather than explaining.

Thanks for noticing, I'm slowly progressing through snags with the design of the lathe. Next I'm having a go at the saddle gib locks. Nevertheless I'm slowly getting there. All the best Graham and thank-you for the comments, they are always welcome. Good or bad.

That was an odd sized Tap at 29.75mm dia x 3mm Pitch. Now I have spares and the tools to fix the brass lead screw nut in the event the same re-occurs. Graham

good! subscribed!