- Joined
- Jan 1, 2018
- Messages
- 31
Picked up a gently used Clausing 8520 the other day. Spent a couple weeks disassembling, cleaning, and painting it. All-in-all I think its a pretty nice little milling machine in pretty good shape after really digging into it.
It's got some problems, however, and most of you might spot one or two in the pics, but wanted to use this thread to ask some questions and get some help getting her up to snuff.
Probably the biggest thing is the motor. After finally getting it installed and running, I've noticed that it has almost no torque. It gets up to speed quickly when no pulleys are attached, but once I rigged up the drive pulleys and belts, I can slow it down just by putting moderate pressure on one of the pulleys...kinda bogs down and then kicks in a little power, then bogs down again...rinse and repeat. Not sure that its wired correctly, I just put it back together like I found it, as I'm not really familiar with wiring these kind of motors up. Hopefully I can attach the video of it for better understanding of the issue.
Its also missing some Gib screws on the front X-axis?? I believe I can make the screw parts, but I'd like to find out what kind of nuts those are. The have almost a bare steel finish and a bit wider diameter, and thinner profile with a flat part on the machine side...probably a common type but I haven't found them yet. 1/4x20 thread.
This is my second 8520. I bought my first one a few years ago and always intended to restore it, but never wanted to take it out of service just in case I needed to make a part or something during the resto. I found this one recently and it has the 4" riser extension which will really help my Z-axis issues. Once I get this one up and running, I'll start in on the resto of the other one.
Currently into a DC motor conversion and actually have it mounted up and running, but the motor controller I have won't keep a constant speed with application of a load. It really bogs down just like the AC motor, so i'll have to look into the setup a bit more. I'm basically copying what I see people on youtube doing, without actually knowing what Im doing lol. The last two pics show the DC motor mocked up with the pulleys, but it was just to get things turning and see what happens...as I suspected, it bogs
More soon...
It's got some problems, however, and most of you might spot one or two in the pics, but wanted to use this thread to ask some questions and get some help getting her up to snuff.
Probably the biggest thing is the motor. After finally getting it installed and running, I've noticed that it has almost no torque. It gets up to speed quickly when no pulleys are attached, but once I rigged up the drive pulleys and belts, I can slow it down just by putting moderate pressure on one of the pulleys...kinda bogs down and then kicks in a little power, then bogs down again...rinse and repeat. Not sure that its wired correctly, I just put it back together like I found it, as I'm not really familiar with wiring these kind of motors up. Hopefully I can attach the video of it for better understanding of the issue.
Its also missing some Gib screws on the front X-axis?? I believe I can make the screw parts, but I'd like to find out what kind of nuts those are. The have almost a bare steel finish and a bit wider diameter, and thinner profile with a flat part on the machine side...probably a common type but I haven't found them yet. 1/4x20 thread.
This is my second 8520. I bought my first one a few years ago and always intended to restore it, but never wanted to take it out of service just in case I needed to make a part or something during the resto. I found this one recently and it has the 4" riser extension which will really help my Z-axis issues. Once I get this one up and running, I'll start in on the resto of the other one.
Currently into a DC motor conversion and actually have it mounted up and running, but the motor controller I have won't keep a constant speed with application of a load. It really bogs down just like the AC motor, so i'll have to look into the setup a bit more. I'm basically copying what I see people on youtube doing, without actually knowing what Im doing lol. The last two pics show the DC motor mocked up with the pulleys, but it was just to get things turning and see what happens...as I suspected, it bogs
More soon...