Quote Originally Posted by ngwagwa View Post
Am I correct that a retro-fit would mean a new motion cotroller, PSU and 3 new drivers and if this is the case could I (for the time being) just use a new driver on the X Axis and use two HY-DIV268N-5A drivers for Y and Z?
Yes for the best effect a full refit is required. However like I said before it's the volts that give you the speed and with those drives, you have a maximum of 48v. However, they are rubbish TB based drives and if you run them anywhere near 48v they will die quickly so you are going to be limited to around 40vdc to be safe.

You need to test the voltage the drives are running at now to get an idea of what will work best. If you do buy new drives then go for something better than those you have. Digital drives are cheap now and can be found for around £40. They will outperform those drives by a large margin and be much smoother and more reliable.

Also using an Ethernet-based motion controller will make a massive difference to how the machine performs compared to the parallel port. When combined with Digital drives running with a voltage around 56Vdc the performance compared to the standard machine will blow your mind.
I converted what I think is the exact same machine(using original steppers) and it would easily reach 15Mtr/min rapid speeds but was derated to 10mmtr/min for use and will cut at those feeds if required. It's been running flawlessly for nearly 3yrs and is used every day to make molds etc.

You really do get what you pay for, so if you want the best save up and dump the rubbish your using now.