Member postings for Andrew David

Hi Dave, one question , what happens in case of power failure during operation. When the power comes back, will the VFD power the motor from the pre power failure setup. Or, should VFD be switched on again to run the motor?

Thanks

Andrew

I appreciate all your inputs and learning a lot as I prod along.

Andrew.

Hi Jeff. Thanks for your input. Some wise advice there . However my situation is that I operate in a single car garage and there is absolutely maxed out with no space for any metal working machines . So, I intend to build a large shed in the back yard ( kids are growing up fast) and make that into a metal working shop. Currently I don’t have the budget for that , given the cost of timber have soared . That’s why I am planning to make this drill press modification. Well, enthusiasm may die down and I may revert to following your advice . Let’s see ! 😖

This is what i am thinking about VFD wiring . Any thoughts most welcome. Thanks

Thank you for that clarification!

I measured the shaft of the existing motor with a digital calliper and it read about 18.90mm . So I guess it’s a 19mm shaft . I don’t know if it’s a 3/4inch shaft. It may very well be an imperial shaft .

After removing the current pully off the motor shaft and I will see if I can drive into the 19mm shaft of the new motor carefully . If there is a problem , I will order a new 19mm ID pully (May be with only 2 steps and fit that one into the new shaft.

BTW , I haven’t bought any materials yet. Just gathering knowledge and information ! It will be done soon. Sure I will post some photos!

cheers

Lot of valuable knowledge shared in the above posts. Important points are taken. When I get to doing the job, I will remember them .

I have also shortlisted the TEC motor with identical body and mounting spec to my existing motor.

have shortlisted a few VFD under £100 in Amazon.

my plan is to control the “on-off’ externally and keep the speed control on the VFD . Planing to mount the VFD in the side of the machine and a small control box at the font . So the control box will have ON OFF E-STOP, & F/R switch .

Hello JH

The current configuration is 19mm shaft and 6mm keyway single phase motor.
I have found a TEC motor of the same specs. So I guess it should be a straight swap of pulleys . I think I should be able to pull it out with a gear puller and press it into the new motor shaft. May be I will have to do some heating up and cooling done of the part to home it in. Let’s see.

Thanks all for you input.

my machine is a floor standing Jet JDP 17 Model.
yea mechanically I can vary the speed but somehow I don’t go up there to change the pulleys for various speed. I need a step stool to do it without straining. I guess laziness is the real reason 🤣! I tend to keep the same speed for all size drill bits and have ruined some bits in the process. That’s why I wanted to control speed with VFD .

Hello

I am new to this forum and a complete novice when it comes to engineering stuff. I have been a hobby woodworker and slowly wanting to get into machining work. Been looking at lathes and mills in YouTube and getting some idea.

I own some wood working machines and i want to modify my drill press.

I want to change the motor in my drill press to a 3 phase motor and add a VFD for speed control.

Should i chose a 2 pole or 4 pole motor? I understand the speed difference,

My thoughts are, I want to remove the middle pulley in the drill press and connect the motor pulley to the spindle pulley directly and control the speed with VFD. The pulley ratio is going to be different became of the arrangement that exists already. I hope you are about to understand my rambling.

Any thoughts and advice would be much appreciated. Thanks.

Andy