Thanks Jon. I found a diagram in another forum that I think is like this machine. But I can’t find a diagram of the motor windings.Ya its just the tap on the transformer needs to get changed. Can you get us a pic of the inside of the cabinet and the transformer specifically?
H&W Machine Repair
Thanks Jon, I found that last night. I have it going on 240 volts now. The spindle works great but I can't get the pc to boot up. Nothing comes on the monitor when powered up.If you are talking about the spindle motor and are going to low voltage, its on the plate on the motor. Wiretie 4 5 and 6 together, then your legs of incoming power go to wire 1/7, 2/8, and 3/9.
I just purchased an older model EZ DX (1995 or 96)? It has 480Volts on the tag. Does anyone know if the transformer can be changed to accept 240 volts? Does anyone have a schematic or a wiring diagram?
First, make sure someone has not already changed the voltage. Check the wiring on the spindle motor, check the tap on the main transformer and also check the main power switch. The main breaker will need to be changed also. Check with EMI
So you never got yours to boot up either? Back in the late 90s I converted an SX like yours to a DX with hard drive and extra memory. But where I worked had plenty of donor PCs laying around. Not to mention I had a Dx to look at sitting right next to it.Your cabinet looks a bit different inside than my EZTrak, so this may not apply. Mine is the no hard drive version that boots off of the floppy drive. After replacing the floppy drive, motherboard BIOS battery (it's an easy solder in), the monitor, and the boot disc I managed to get mine booted into DOS, but couldn't get the Bridgeport software running.
I'd be happy to dig up the piles of files I have if you want. If you manage to actually get into any software I'd love to know what worked for you.
So you never got yours to boot up either? Back in the late 90s I converted an SX like yours to a DX with hard drive and extra memory. But where I worked had plenty of donor PCs laying around. Not to mention I had a Dx to look at sitting right next to it.
Thanks Jon, I found that last night. I have it going on 240 volts now. The spindle works great but I can't get the pc to boot up. Nothing comes on the monitor when powered up.
I can see that you have the SBC upgrade done to it. But without knowing the voltage readings or without knowing if it works with an external monitor (just a normal computer monitor) I cant really offer any other suggestions.
H&W Machine Repair
A couple things to check:
1) Make sure the voltage going to the monitor and rest of the computer are correct. If you had to change the taps on the transformer for the motor, you may also need to change the taps for the computer. I got lucky on mine, it was labeled as something like 480 on the cabinet, but was in fact set up for 230 when it came into my possession.
2) Make sure the monitor is good on another source. You should (at least I did on mine) see the BIOS flash by.
3) Consider plugging the entire computer in to a separate power source. The first monitor I swapped in to mine made some very interesting buzzing noises. Once I plugged it in elsewhere that went away. I have not gotten around to hooking a scope up to the original supply to see where it is coming from.
I have tried connecting the PC power supply and stand alone monitor directly to the wall. I have LED lights on all the boards but still nothing to the monitor.
I had to install jumpers on the transformer to match what was in the manual.
Have you tried a different monitor, or tried that one on a different computer?
I have an update. I finally got in touch with EMI. The tech. Told me the problem pretty much right away. It’s the video chip or something related to it on the single board pc. I got to looking at the EZ path I bought with this machine. It has the exact same board so I swapped it out and it fired right up and homed straight away. EMI sells the card for $700 so I’m back to saving for this project. I spent everything I had on buying the phase converter for my shop. I also found out the head doesn’t have the gear that lets you rotate the head. It’s missing and it appears the dowels and woodruff key are all sheeted.
I saw that tip on this forum , it might have even been you that mentioned it. I made one out of some 1-1/4” hex stock. Worked great! I have to dig into it more but it appears to be missing the round gear on the ramDid you take the head off, or does the input hex just spin freely? My understanding is that breaking that gear/shaft is a somewhat known issue if the head is tilted much without additional support. I recently pulled a head by turning a 3/4" round on the end of a 1.5" square bar. Square part in the middle of the vise, round part in the spindle (3/4 R8 collet is the largest we have), and then pulling the table forward after removing the four nuts that hold rotation. Easy as can be, and it was my first time. Obviously make sure the quill is fully up first as I doubt the quill brake will hold the weight of the head.