View Single Post
  #11 (permalink)  
Old 05-16-2006, 11:36 PM
sswee's Avatar
sswee sswee is offline
Moderator
 
Join Date: Nov 2004
Location: close to Austin, Texas
Posts: 1,240
sswee is a jewel in the roughsswee is a jewel in the roughsswee is a jewel in the roughsswee is a jewel in the rough
Default Re: How much acid in bath?

Quote:
Originally Posted by caswellsage
You might find (like I have) that the LCD acid being very weak means that the voltage to get the 2amps flowing is quite high, maybe higher than your supply can deliver. This problem gets worse for small parts. It's a simple matter of adjusting the current to get a usable voltage and re-doing the calculation to find the time. Use the constant CURRENT setting of the supply.
A slight flaw in what is causing what. The acid concentration has a direct effect on the level of voltage as it is part of the resistance in the circuit. Ohm's law dictates that. The real reason for a PS to max out using the numbers you gave in the example is that you are running the part at a 14 ASF current density.
SS
Reply With Quote