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Vacuum Blower Over-heating issues
Hello Shopbotters,
Great forum! First time poster.
We recently replaced the plenum, spoil boards, and vacuum hold down system on our Shopbot.
Attachment 25168
I used a 3/8" endmill to cut the large grooves in the plenum material. This material is a product called Richlite, a GREAT material for this application. The smaller grooves where cut using a 1/4" ball endmill. After machining, we installed new MDF spoil boards, and a new 6 zone plumbing system. Then we started up the vacuum blower...
Attachment 25170
and then this happened to the exhaust tube...
Attachment 25169
The blower is VERY hot to touch. With only one zone open, the vacuum gauge is reading 8.5 "hg. With all 6 ports open the reading is 6 "hg. Before replacing the plenum/MDF etc., there were no heating issues.
Could the problem be:
Not enough cfm of air to keep it cool? Which could be from using a 3/8" instead of a 1/2" endmill to cut the grooves? Could it be from using MDF instead of a low density board?
Thoughts?
Thanks in advance!