Internet PLC Forum

Got a good deal on a pair of encoders. One to use and one for spare.

Hollow End - Shaft      
Incremental encoder with integrated OPTO-ASIC, providing high interference immunity  
Speed up to 6,000 RPM  
Signal outputs A, A inv., B, B inv., N, N inv  
Temperature range for 5 VDC up to +100  
Power Supply 10 to 30 V  
Current consumption  
Operating frequency 150kH max  
Output signals Channel A, B, N + inverted  
Output stages  
10 - 30Vdc Push-pull output,short-circuit-protected  
RPM Value 6,000 rpm max  
Hollow end-shaft 12 mm / 22 mm deep  
Material Flange / Housing Aluminium  
Operating temperature -20 ?C to 70 ?C  
 

Voltage   10 - 30 Vdc
PPR 1024
GI330.0604123 349-0038  

I trust this will do the job ?

Been looking at encoders and it all seems a bit of a mine field? Would I be correct in thinking a linear encoder is what I'm looking for as the action of the feed arm is linear. I most likely won't understand but can you give me a quick lesson on encoders for dummies or even a few part numbers to look up.

The saw is hard at work and so am I but as soon as I get a minute I will begin the task of detailing spec on all the component's that need to be controlled, solenoid valves etc. I will also attempt a drawing of the electrical system for members hopefully to edit.

At present the motor contacters and solenoid valves are all 110v, powered from a transformer. Would this be a good time to be thinking about changing them to 24v. I already have two 24v power supply's that I think may come in useful. Again i will post spec on all items soon.

Many Thanks

I will start from the beginning.
What I have in my home workshop is an old relay and timer driven Band saw, its seen better days yet is mechanically sound.
It has an Auto feed and cutting head both driven by hydraulics and controlled by relays, contacter's and timers 110v.
The machine runs and cuts very well but needs constant attention to the electrics. Mostly due to neglect and interference by the previous owners.

My plan and a serious one at that is to fully re-wire and upgrade all the electrical system. It was wired for 3 phase 415v but I,ve change one motor to 240 and added an inverter for the other. It also had a 240v pump motor so thats been left as is.

So what I need is a spec on the 240v supply gear, would be running about 20amps at present.

Recommendation on what plc would be best for this application

help with the programing.

Function:

Mains in

auto feed mode/ manual mode switch, various switches already fitted for start and stop positions(EOS) of each action, control action is made by 110v two way hydraulic solenoids. Various warning lights, start and stop buttons.

Wish list and final goal.

The length of bar feed in on each cycle is governed by a movable hard stop, this I would like to change for something that is both accurate and changeable from an HMI or even a touch screen.

I'm just building an addition to the machine that will place a large drill in line with the machines bed, I'm wanting to use the bar feed but switch function to operate the drill head and not the saw blade. The mechanics is simply but the hardware and programing will need to added.

So if your still reading and can offer any advice I would be most grateful.

Regards
Paul