G
Gav
New Member
Full Member
- Messages
- 26
- Reaction score
- 1
I just got my shiny new Zubler variopress 300 and tried to press some emax copings.
First time: Used pressvest speed, disposable plunger and followed manual to the letter and used the zubler LT 200gr program. The LS2 pressed short. Only the sprues and tops of the copings came out. The LS2 had squeezed between the plunger and the investment and a thin ring had formed. I didn't realise this was a problem until reading a few threads on here.
Second time: I was worried the zubler programs were too good to be true with a final temp of 885C so I programed in the ivoclar settings manually from the manual. Everything else was the same as the first time. The result was exactly the same.
Now, having read a few threads on here someone resolved this problem using an alox plunger. I'm guessing the sensor in the the oven 'thinks' the press is complete because the material is coming back up between the investment and diposable plunger. It was a very thin layer BTW, so nothing major.
Anyone have any ideas other than the plunger issue?
Also, I can't find anywhere in the manual or their site how you calibrate this furnace.
I just remembered something. Our usual burnout oven broke yesterday and we had to use an old one. Could the issue possibly be linked to a calibration issue of that oven?
Sorry for the long post.
Gav
P.S. The reaction layer using the zubler program was much less than using the ivoclar parameters.
First time: Used pressvest speed, disposable plunger and followed manual to the letter and used the zubler LT 200gr program. The LS2 pressed short. Only the sprues and tops of the copings came out. The LS2 had squeezed between the plunger and the investment and a thin ring had formed. I didn't realise this was a problem until reading a few threads on here.
Second time: I was worried the zubler programs were too good to be true with a final temp of 885C so I programed in the ivoclar settings manually from the manual. Everything else was the same as the first time. The result was exactly the same.
Now, having read a few threads on here someone resolved this problem using an alox plunger. I'm guessing the sensor in the the oven 'thinks' the press is complete because the material is coming back up between the investment and diposable plunger. It was a very thin layer BTW, so nothing major.
Anyone have any ideas other than the plunger issue?
Also, I can't find anywhere in the manual or their site how you calibrate this furnace.
I just remembered something. Our usual burnout oven broke yesterday and we had to use an old one. Could the issue possibly be linked to a calibration issue of that oven?
Sorry for the long post.
Gav
P.S. The reaction layer using the zubler program was much less than using the ivoclar parameters.