Full Version: Just curious
From: Engravin' Dave (DATAKES) [#42]
2 Apr 2005
To: LaZerDude (C_BURKE) [#40] 3 Apr 2005
Chuck,
The black border around my image was about a quarter inch on each side. After the exposure, I cut the darker part of the border to allow for an easier removal of the carrier sheet.
From: Engravin' Dave (DATAKES) [#43]
2 Apr 2005
To: UCONN Dave & Lynn too (DANDL48) [#38] 3 Apr 2005
Dave,
I didn't bother to change my settings because Photobrasive has recommended settings of 30-35 psi. I have my system set at 30 psi.
I also use 180 grit silicon carbide for my blasting media.
From: UCONN Dave & Lynn too (DANDL48) [#44]
3 Apr 2005
To: LaZerDude (C_BURKE) [#41] 3 Apr 2005
Chuck,
It wasn't me saying to use 3 min, we use 4 and it works fine. Very difficult to overexpose RapidMask.
Dave
From: UCONN Dave & Lynn too (DANDL48) [#45]
3 Apr 2005
To: Engravin' Dave (DATAKES) [#43] 3 Apr 2005
David,
How close do you hold the nozzle from the media? You might want to try 6" and back off on the pressure.
Dave
From: LaZerDude (C_BURKE) [#46]
3 Apr 2005
To: Engravin' Dave (DATAKES) [#43] 3 Apr 2005
David,
I tried blasting these with 33psi as recommended by Photobrasive. When I turned the pressure down to 27psi, I got a much nicer etch.....
From: Harvey only (HARVEY-ONLY) [#47]
3 Apr 2005
To: LaZerDude (C_BURKE) [#46] 3 Apr 2005
Probably nothing but the standard inaccuracy of the pressure gage. Minor wear in the nozzle or venturi mixing area can make large differences also.
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