Polar Emc 115 DIY electronics replacement- help needed

I have a polar EMC 115 guillotine. Machine 5232179, fro. The 1980s.

Mechanically, it is perfect..but the electronics are starting to cause problems.

I have built a number of different machines using a motion control card and servo motors. The card has 20 digital inputs and 20 digital outputs. I'm competent in programming this.

I feel comfortable with replacing the backguage motor with a closed loop stepper that I can control from the board.

I'm struggling with the flow of controls for the clamp, safety bolt, and blade.

Is there someone who knows this machine intimately and can assist me for an hour or two to understand the flow of each step.

Ie,
1. Send x volts to the clamp to activate
2. send 42v dc to the safety bolt to retract
3. Check the safety bolt sensor to ensure it has retracted
4. Send 42vdc to the cluth to engage the blade
5. Wait till blade top position sensor is activated
6. Re engage safety bolt.

Etc etc

I'm sure it's more complicated than this, and would love some assistance from someone who I could bounce ideas of. I would be happy to share back to the forum whatever I end up making.

 

I don't know about Australia, but the safety standards on guillotines in the UK are very stringent. I would be very carefull doing a DIY on a guillotine. Everything needs to be duel channel cross monitored inputs and fail safe safety outputs. Any accidents would be your responsibility

 

Thanks Andy,
Rules here are strict, but not as strict as UK. My plan was to replace the existing light curtain with a modern version, connected to a dual channel safety relay. Presumably the biggest risk is the knife cutting someone, so this should hopefully negate that.