Member postings for Andrew David

I like the depth stop modification - I shall steal the idea for my drill press.

Does the belt guard actually need a catch (or a screw)? Mine has functioned perfectly safely for decades without either.

George

I quite like the machine in that the spindle runs true enough and there is minimal slop in the quill, but mine 'shakes' quite a lot. I improved things significantly by skimming the drive pulley on the lathe - it was quite badly out of balance- but have yet to get round to doing the intermediate and spindle pulleys. Just wondering if you have any such problem and if so how you have addressed it.

Robin.

Hi Robin, thankfully mine is ok. If it wasn’t i wouldn’t know how to fix it because I don’t have any machining tools (lathe, mill etc). I am a woodworker basically and beginning to develop an interest in machining.

Thanks

Andrew

“thats just a 24v dc parvalux geared motor driving the shaft which lifts and drops the table and a switch mounted on a flying lead so that can mount on the table where i can get to it”

After you bring the table to desired height, do you have to manually lock them in place? Or does the gears hold them in place?

Thanks

Andrew

Andrew has still not specified the units of his 0.03 so we still do not know just how bad it is.

Les.

Andrew, its not really a conundrum. I cannot say all, but most VFDs act in a No-Volt method.

Some can be programmed to restart the motor after power fail but by default most do not 'read' the switch positions at power up so even if the RUN switch is closed tha motor will not start. (until the switch is cycled off first)

Ian P

Edited By Ian P on 10/01/2023 16:02:03

Makes sense. Thanks.

My VFD's are mostly as your plan A but instead of a (two position) F/R switch, I have a toggle switch with a centre off position (so no need for stop/start buttons) On the drilling machine I can reach easily the switch with the same hand holding the downfeed lever.

I use the drill for tapping threads (M2 to M14) and the ability to reverse is a godsend.

I can also reach the speed control potentiometer (to which I have fitted a very extended pointer (just a long grubscrew actually) which means I can change speed by fingertip without having to grip the knob.

I strongly suggest that you fit a remote potentiometer rather than using the up/down buttons on the VFD itself which in my experience carry out their intended purpose but are nowhere near as ergonomic as a potentiometer.

Ian P

P.S. I'm sure Dave will answer, but VFD's are usually set up so that the motor will not restart after cutting the mains power .

Edited By Ian P on 10/01/2023 15:13:23

Hi Ian,

Have you ever tried to turn the main power off while your drill press is running and turning it back on? This will answer if the VFD comes back on and run the motor or not?

Logically thinking, if the VFD power is interrupted and your toggle switch is in the on position and you left it that way, when the power comes back, the VFD will get the power and the toggle switch will keep the connection on , and the motor should power up. Unless there is a contactor upstream to VFD, in that case we will need a power on off button for the contactor. Hmmm!

I hope someone will be able to clarify this conundrum.

Cheers.

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

If i chose Plan A that is!