Temperature of Sm74 while operating

Hi, so hopefully my machine should land in Sri Lanka by early next month. The reason behind mentioning that we live in Sri Lanka, is that we have a humidity of close 80-90% and the year round temperature is 27-33 Centigrade. This means if we are running this machine we would require to air condition the space, or all the alcohol might evaporate. I would like to know if someone has actually measured the heat that is released from this machine, in order for the Air Con guys to gauge the capacity of the air condition unit we need to set up.
Thanks , and hope everyone is keeping safe from the virus.

 

Dear cc,
I think that the ideal temperature should be around 23c°.
Humidity 60-70%.
Good luck.

 

Hi,
You didn't provide more details about your machine. What is the age? Is it air cooled or water cooled? Is there any IR dryer? As standard, you should maintain temperature between 23 and 25. Humidity at that region is relatively high and it may condense on metal surfaces of machine and makes corrosion which will damage your machine. What you should consider is reducing temperature and humidity by using absorption air conditioners. These equipments are quit expensive but it really worth to invest on it.

Good luck,

 

Hi, Mathew,
Its a 2001 SM74 2 color.
It has CPC 1.04 Center
ALCOLOR damping circulation and refrigeration
No IR dryer.
Thanks for the advise on the type of air conditioning unit. For the guys to figure out how many BTU's the air conditioner should be I need confirm Heat emitted from the machine. Would you have any idea?

Thanks again,
Charith

 

It's very difficult to estimate heat emission of the machine. But your machine is not a multi colour with high heat emission rate. I would say add 30% to calculated BTU and order appropriate air conditioner.

Good luck,

 

The alcohol evaporating under them conditions will be the least of your problems!!!

 

You could try lowering temp of refrigirator to keep ipa from going away or you could try a substitute of ipa.

You can always try to isolate press with air curtains or plastic caurtains that hang from ceiling, combined with a medium a/c can make your job easier.

What tom says -in turbo mode!-, is that your ink`s viscosity will rapidly and constantly change, that makes your life bit of difficult, since your densities and dot gain will be affected by temperature!

 

I was thinking more in terms of the 90% humidity. At humidity levels that high, for any length of time, you can be assured that your paper will take on lots of water, and become very wavy. This wavy stock will make for feeding issues along with internal registration problems.

 

This thread shouldn’t even be about the press, because it’s really more about environment control. Don’t overthink the process and make it more difficult than it has to be, just focus on the environment. After you get a room setup with a sustainably maintained temperature around 71 degrees Fahrenheit (give or take), go ahead and put your press in there. The systems that come with the press will take care of the rest. It’s why ink chillers and fountain circulators were designed in the first place.

I’ve worked in pressrooms that were both much warmer (and cooler), and was still able to print, no problem.

 

Hi,
Sorry for digging up this thread again, currently the press room temperature is close to 23 degrees C . And I have noticed that the solution in the Bladwin chiller is frothing and it spills (The last photograph).
(a) What equipment is used to measure the alcohol in the water?
(b) What basis do I increase and decrease the percentage?
On the side of the unit there is a table saying alcohol 5,10,15% at different temperatures. How would I link the percentage to my print dampening?

Hope I am making sense, just want to make a scientific judgment on how to manipulate the alcohol.

Regards,
Charith

 

You measure the alcohol percentage in the fountain solution with a hygrometer. There shouldn't be much of a need to run more than 5 to 7% alcohol. If you require more than 5 to 7% isopropyl your doing something wrong. Either your other chemistry is not right, or roller settings are off. Or even roller durometer is off. Be sure to verify that the alcohol percentage setting on your Baldwin tank is in sync with the reading you get with a hygrometer. Also it looks to me that the water level in your tank is too high. This is the reason why you are overflowing. Try running the level down an inch or 2 and you will not overflow. You might also try to tie a bit of weight to your filter so that it is fully submerged. This will help with the surface foam.