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eskimo
28th May 2019, 08:08 PM
Can anyone advise what type of remote pushbutton switches are required in lieu of keypad. I am aware i will need to program the vsd.
Are the switches spring return to NO or NC as required.

Michael G
28th May 2019, 09:20 PM
Your VFD instructions should have a schematic, but from memory (always dicey) it is NC for stop and NO for start. That way if a wire is cut it fails safe.
You could probably wire up a rotary switch to do the same thing if you don't have/ like spring return switches

Michael

eskimo
28th May 2019, 09:24 PM
[QUOTE=Michael G;1951211]Your VFD instructions should have a schematic, but from memory (always dicey) it is NC for stop and NO for start. That way if a wire is cut it fails safe.
You could probably wire up a rotary switch to do the same thing if you don't have/ like spring return switches

Michael[

I know that bit Michael....but what type of switch action...they aint self latching are they ie not like a light switch?

You can use either self latching or momentary but they are wired slightly differently, it should be shown in your manual.
I prefer to use self latching so the switch position is obvious that the machine should be on/off/reverse.
Momentary switches often leave me wondering what state is what and if I used them I always add an indicator light

Michael G
28th May 2019, 09:43 PM
I have momentary contacts on all mine - the stop is usually a twist to release arrangement but still wired in as momentary. I can understand the need for alight when something is energised but may not be running, but for a VFD directly coupled to a motor, there is probably no need - the motor is either running or not. Easy to see.

Michael

jack620
1st Jun 2019, 03:51 PM
My drill press has a rotating ON-OFF switch.

familyguy
3rd Jun 2019, 12:09 AM
It may depend on your vfd, both of my HY vfd's work with regular switches like you basic toggle or micro switch - they are not the momentary type. This allowed me to use the apron mounted lever and it's associated micro switch to stop and start the lathe. The jog button is the momentary type where the motor runs only while the button is depressed.

Poloris
6th Jun 2019, 03:20 AM
I chose to take my Colchester Bantam off the standard pedestals and mount it on a very sturdy bench.
As I wanted to operate it by using the apron control lever, I had to replace the switch gear with a latching rotary switch.
The control linkage took a bit of work.
I expect I may have to modify the control lever in the future to allow for wear.
I also added a digital readout and Potentiometer, this makes it nicer to use.
It was all done successfully and is a joy to operate.
WARNING if you need to take one of these switches apart wrap insulation tape around the rear section before doing so, you can guess why.

Mark

BobL
6th Jun 2019, 08:53 AM
It may depend on your vfd, both of my HY vfd's work with regular switches like you basic toggle or micro switch - they are not the momentary type. This allowed me to use the apron mounted lever and it's associated micro switch to stop and start the lathe. The jog button is the momentary type where the motor runs only while the button is depressed.
His also work with momentary switches - they are just wired differently. It took me a while to realise this.

lamestllama
7th Jun 2019, 01:25 PM
I chose to take my Colchester Bantam off the standard pedestals and mount it on a very sturdy bench.
As I wanted to operate it by using the apron control lever, I had to replace the switch gear with a latching rotary switch.
The control linkage took a bit of work.
I expect I may have to modify the control lever in the future to allow for wear.
I also added a digital readout and Potentiometer, this makes it nicer to use.
It was all done successfully and is a joy to operate.
WARNING if you need to take one of these switches apart wrap insulation tape around the rear section before doing so, you can guess why.

Mark

Mark, Your Bantam looks very nice. I have a couple of sideways related questions.

Did the lathe originally have a two speed motor and did you reuse it? If so in what configuration?

How did you get such a good finish?

Eric

Poloris
8th Jun 2019, 11:22 AM
Eric the Bantam came with a single speed 1400 rpm motor, I have replaced it with a 2800 rpm 1.5 hp 3 phase motor.
Tony's Lathes UK site says the lathe was exactly the same as the 2 speed one, but with a single speed motor.
The pretty finish is the result of spent plenty of time preparing and spray painting it all during the rebuild.
Mark