Copal # 1 shutter

[perry1963]

Hello, I'm new to the forum and LF, it's good to be here, seems there is a lot of info on the forums. I bought a Shen-Hao HZX-45iiA camera and a Caltar 150mm lens in a Copal #0 shutter a few weeks ago and decided I also wanted a 210mm lens, found a Schneider-Kreuznach Symmar-S in a Copal #1 shutter on Ebay for a good enough price, I noticed that the shutter cocking arm doesn't spring back after cocking the shutter like it does on the #0 shutter of my other lens, it doesn't seem to cause any problems as I just push it back with my finger, does anybody know if this is normal or should it spring back on it's own?

 

[shutterfinger]

My #1 Copal cocking arm springs back to the home position upon releasing it when cocking the shutter.
Set the shutter to the 1 second position and cock the shutter.
Set the aperture wide open.
Position the shutter so that you can see the shutter blades and the second hand of a watch or clock simultaneously.
As the second hand touches a second marking trip the shutter. Monitor and note the second mark when the shutter just reaches full closed. In tolerance is the width of the second hand either side of the next second mark.
Set the shutter to 1/2 second and repeat. In tolerance is half the second hand width either side of the mid point between the trip and the next second mark.
A sweep second hand works best but a quartz step can be used but the 1/2 second will be a bit more difficult to read.
Now advance the shutter to the next higher shutter speed, cock and release until you reach the fastest speed. Each speed should be noticeably faster than the previous. Once at the fastest speed work your way back down, each speed should be noticeably slower than the previous.
If the 1 second and half second are correct the other speeds up to 125 should be good also, the slow or non returning cocking arm is a non issue. If the 1 second and half second are noticeably slow then the shutter needs a CLA.

 

[perry1963]

Thanks Shutterfinger for the response, I checked the shutter speeds as you described and all seems normal. In fact all functions of the lens seem normal other than the shutter cocking arm, I don't hear anything rattling around when I shake the lens, like something broke off inside.

 

[Doremus Scudder]

Probably missing the return spring. If everything else works alright, then you could live with it. I'd shake the shutter around a bit and see if anything rattles though... The next time you send it in for a CLA mention the issue and the tech will repair it.

Doremus

 

[perry1963]

Thanks Doremus, Ya I shook the shutter and didn't hear anything rattling around, fired the shutter while holding it in different positions, upside down, right side up and even flipped my hand back and forth while I fired it, still no problems. I can live with the arm not returning so I will address it when I have regular CLA done.

 

[shutterfinger]

With the shutter cocked does the cocking arm move freely or is there some tension on it? Mine has about 2 to 4 ounces of pull once cocked.

 

[perry1963]

Moves freely, no tension.

 

[shutterfinger]

Possibilities are improperly connected, broken, or missing spring.