An automatic two-axis die cutting press uses a die board with steel knives to cut leather on a nylon board. Below the nylon board, which is usually 1/2" thick, is a base plate made of metal, usually 1/8" thick.
The head of the press usually works in the center portion of the press, exerting up...
The motor is running a regenerative blower, to create vacuum to pick up parts off of a conveyor. So basically the motor is running a fan, which I'm assuming will be a constant load.
Did a search on this subject here on the site, and the closest I came to was this thread, but not the answer I'm looking for: http://www.eng-tips.com/viewthread.cfm?qid=39095
My question is simple. A 3HP 240VAC motor with appropriate VFD drive running at 60Hz continuously 8 hours a day, without...
Trying to compute consumption of electric power for a 3 phase machine, which has an average currents of on a continous basis, as measured with a current loop ammeter:
phase 1 = 16A @ 120V
phase 2 = 16A @ 120V
phase 3 = 8A @ 208V
After cleanup, CSI revealed that the ends of the high voltage stranded wires going into the fuse blocks were dipped in solder. Could that be a cause for the arcing?
Fuses are rated for 480 VAC. Your comment seems reasonable, even though the type of fuse block used does not have a spring. So, I would suspect that the fuse may not have been the correct size and may have been squeezed hard in its place, causing the heat, etc.
Can anyone else confirm?
Thanks
We had an electrical fire in a heater controller enclosure today, where a 5 Amp fuse was disintegrated!
The 5 Amp fuse was in a block of 4 fuses, from left to right >>20A>>20A>>5A>>5A. The 3rd fuse from the left.
No breaker was tripped. The fuse just isn't there any more; it's all carbon...
Thank you for asking all those questions. Let me try to answer some of them.
First of all, I've made certain that the problem is one of electricity/power related, and not mechanical or loose wiring, etc. The time of the day when the problem starts is also at around 9:30pm EVERY DAY.
1 Do you...
Mind boggling thing, which is above my head to understand. Did a search on the forum, but couldn't find anything as crazy as what's going on with my system.
I have an AC drive and a continuous duty motor. Controlled by a few sensors, the motor starts on command, and stops when it reaches end of...
I'm not quite sure if this is the appropriate forum for this question, but I'm sure I'll be guided.
I would like to open a discussion today with the following question: in an automated assembly line, where a stand-alone automatic machine assembles 30,000 parts a day, how many fault stoppages...
I understand that I have to use a non-complicated Venturi system, but I'm using one now but the nozzle is getting clogged with dust.
If the Venturi were 1/8" opening or larger, then I wouldn't have a problem (?), but large CFM, which is OK.
Checked out PIAM and Schmalz; look like European...
Did a search in a few forums but came up empty handed.
Using a Festo vacuum module (13 CFM) (with its own blowoff system, and internal solenoid valves) in a very dusty environment. Even using a 40, 50 and recently 10 micron inline air filters, the vacuum modules are still malfunctioning, due...
I'm sure anyone (but me) her on this forum can answer this basic question, which has bugged me for years [ponder].
If a system is powered by 220VAC, are you saving money from usage of electricity over a similar system that runs on 110VAC ?
Similarly, will you be saving money if your system is...
I am getting petrified reading some of the postings, not for the change, but for what we have today in our punch presses. Doesn't matter that it's an old OMRON (very reliable by the way), but for being a single CPU PLC with absolutely no safety relays!
Of course, as I'm planning to replace the...
Hello all,
Similar to a previous post here, I have an obsolete SYSMAC (Omron) PLC from the late 80's on a brake and clucth operated punch press (25 TON).
I have vast experience in programming PLCs, but haven't done any programs for punch presses. As part of preventive maintenance I'm being...
Hello,
For some readers this may be a repeat, as I have posted this message on other forums as well.
I have a machine from the 80's that has a SYSMAC S6 PLC.
It appears that there is a problem with the PLC and needs to be replaced. The manufacturer does not make or support this PLC. Hence, I...
Brian,
Very true. The Power supply I have is a 7.2A unit, and has +S and -S next the output terminals. However, I can see that the +S and -S are simply wired to their respective output terminals without any resistors.
WOW!0
Thanks guys.
I confirmed:
Voltage under load: 40VDC
Voltage no load: 44VDC
It's gone bad, and am replacing it already.
However, what kind of safety regulator or switch can I add to the output to make sure that the switch will shut off if it delivers more than let's say 30VDC.
Are there...
As my subject header suggest, I have a "regulted" power supply 110VAC in 24VDC out, but measuring the + and - terminals on the output, I am getting 40VDC.
Does this mean that my power supply has gone bad? What could cause this?
Thanks
Very basic question: does hardening (case hardening) change the tensile strength of the metal.
The metal is a rotating shaft out of Leadloy.
How about hardening the whole thing? Does its tensile strength change by doing that?
Thanks.
