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Delta 3hp 3phase Unisaw - need start stop switch wiring help for Teco JNEV-203-H1

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Forum topic by sawdustandglue posted 07-26-2014 09:18 PM 376 views 0 times favorited 4 replies Add to Favorites Watch
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sawdustandglue

3 posts in 53 days


07-26-2014 09:18 PM

Topic tags/keywords: teco vfd delta unisaw

I’m in the middle of setting up a newly acquired Delta 34-806 3 phase Unisaw. I’ve purchased a Teco JNEV-203-H1 VFD based upon a post I saw on this forum. As I only have single phase power in my shop, I needed a way to supply 3 phase power. The VFD seems to be the ticket.

I believe I understand all the connections needed to supply AC power and the need to directly connect to the motor from the VFD, but I have no experience with the low voltage switching side of things. I could really use some help / a wiring diagram on how to remotely control the saw with the on /off switch. I realize I’m going to need to set the dip switches for external control and to then do some setup / programming for what each lug on the terminal block does. I just don’t understand which ones to use and what each needs to be programmed to do. I have very simple needs…start the saw with the on button, ramp up to full speed in 3-5 seconds, stop the saw when the off button is pressed and allow spin down in 3-5 seconds. No additional breaking, emergency stop, etc.

The switch I have is a two button setup (on/off) that has a common between them (3-wire to the switch and ground to the box). It appears that each button has a separate power lead. My assumption is that each switch is simply completing a circuit and switching a relay. i.e. on / off, but I am lost after that Any assistance on how to setup and control this saw with the remote on/off switch from the VFD would be greatly appreciated.

Thanks in advance,

David

-- David, Central Illinois


4 replies so far

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TopamaxSurvivor

14742 posts in 2328 days


#1 posted 07-26-2014 09:55 PM

You definitely need to connect the VFD directly to the saw motor without any intervening disconnects or controls. Maybe some one here has some experience with that particular drive that can give you a diagram for the terminal points. Most drives come with simple preset in and outputs for simple operations. Post a link to the diagrams is no one responds, I’ll see if I can figure it out ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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sawdustandglue

3 posts in 53 days


#2 posted 07-27-2014 02:07 PM

After reviewing the manual several times and disregarding much of it, I think I have a better handle on what I need to do. My buddy loaned me a 1//2 hp 3-phase mother that he wasn’t using so I can do some testing rather than smoke mine. :) I need to head to Farm and Fleet today to get a few supplies for testing, but I think I’m on the right track.

(direct connect to motor leads, bypassing all relays etc. in the saw)

Using diagram 2: PNP (page 29 of the full manual)

1. Set F04 to 001 (external TM2 terminal active)

2. Set F06 to 002 3-wire start / stop

3. Connect 24 v lead to common on the Delta Unisaw switch

4. Connect the start button lead to S1 on the VFD

5. Connect the stop button lead to S2 on the VFD

6. Not exactly sure whether to set switch SW2 to “I”, but it setting it to “V” implies a 10V signal and I is for 4-20 mA.

Manuals:

Full Manual:

Quick Start Guide:

I’ll post an update once I have a chance to test this configuration, but I would welcome ANY feedback along the way. Thanks in advance!

Thanks so much!

-- David, Central Illinois

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TopamaxSurvivor

14742 posts in 2328 days


#3 posted 07-27-2014 05:28 PM

If you understand the drawings you posted, you shouldn’t have any problems. I’m now quite sure why they are asking 4-20 ma or 0-10v for a start/ stop function, but I’m not familiar with Teco. Those are usually the speed control options.

If the instructions do not give a value for the single phase input amps, it will probably be about 50% higher than the 3 phase amperage.. If the drive doesn’t specify single phase input terminals, use L1 and L3.

Do not forget to set up your motor overload protection.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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sawdustandglue

3 posts in 53 days


#4 posted 07-27-2014 10:36 PM

The good news:

The VFD wiring works as specified in the diagram above. I was able to get the test 1/2 hp (test) motor running and then moved on to the low voltage wiring. Simply connected to the 24v power terminal to the common on the on/off switch and then ran the leads out of the switches back to S1 and S2. The ground wire connected to the common (pin 8) I believe. Simply set the function F4 to allow external input and set F6 to 3-wire input mode. Everything started and stopped great. I was all set to move on and then…

The bad news:

The motor face plate on the Unisaw was buried behind the motor cover and I didn’t confirm the size. I was told it was a 3hp saw. Guess what? It actually is the larger 5hp version so I can’t use the VFD to power it.

Not sure where I’m going to go from here. I haven’t written the check for the used Delta saw yet, but it’s setting on my trailer in the shop and I had committed to buy it. Unfortunately, I sold my Grizzly 3hp cabinet saw on Friday, so I’m going to have to do something fairly soon. I really don’t want to have to start up a rotary phase converter every time I want to use the table saw, so I’ll have to consider my options. I know the Delta saws have unique motors so not and typically run $500+. More research…

-- David, Central Illinois

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