THCAD Environmental Fluctuations

More
23 Nov 2020 21:07 - 23 Nov 2020 21:31 #190146 by thefabricator03
Hi Guys,

I had a strange issue with my THCAD the other day. I have been able to replicate the issue under a certain condition,

So I was doing some cutting the other day and noticed the machine making some strange sounds. I went and stopped the machine and noticed that the torch had been going up and down. This is the result.



I looked at the display and noticed that the THC voltage was fluctuating wildly when idle. I think what caused the issue was the temperature in the shop was just under 40 degrees celsius. The next day I cut some more plates and it worked fine until the temperature got up to the 38 degree mark.

Any idea on what I could do to keep the machine working in those temps? Maybe more fans or some kind of cooler in the control cabinet?
Attachments:
Last edit: 23 Nov 2020 21:31 by thefabricator03.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 21:19 #190148 by tommylight
Can't help, it's -4 here.
Wana trade ? :)
Had 3 of them working during the summer at different sites, no issues with any of them despite some days being 37 in the shade.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 21:22 #190149 by thefabricator03
Lol no I hate the cold! The thing is its not even summer here yet. Next Sunday is suppose to be 43 degrees.

I am thinking something must be wrong with the air flow in my cabinet. What would cause the fluctuations? The power supply to the THCAD? or some kind of emi?

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 21:28 #190150 by rodw
Interesting artwork!

The THCAD is rated to 70 deg C so where is it located? In your control box? How well cooled is that?
Can you check the voltage with a multimeter at the THCAD input if it happens again.
I would be checking for noise in your electrical seeing you have made changes there.
You do have a filter on the power inlet to your box don't you? If not, fit one straight away.
The following user(s) said Thank You: thefabricator03

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 21:33 #190151 by thefabricator03
Thanks Rod,

I will look into the input power filter, at the moment the incoming power feeds the UPS and all of the electrical items are powered from that.

Ill see if I can replicate it again in the next couple of days and do some more testing.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 22:05 #190154 by thefabricator03
Rod, What do you think of this filter, www.jaycar.com.au/240v-ac-emi-filter/p/MS4001.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 22:22 #190156 by rodw

Rod, What do you think of this filter, www.jaycar.com.au/240v-ac-emi-filter/p/MS4001.


I think that would work if you had a hard wired power input. If you have used an IEC connector on your control box, this is much easier
www.jaycar.com.au/iec-emi-power-line-filter-6-amp/p/MS4003

Also add it to your control box to protect it from anything emmanating from the UPS.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 22:25 #190157 by tommylight

Rod, What do you think of this filter, www.jaycar.com.au/240v-ac-emi-filter/p/MS4001.

No need for that, you have one in the UPS, even the cheap ones do have one.

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 23:05 - 23 Nov 2020 23:06 #190160 by PCW
The THCAD should work fine at 70C and even higher
Are you sure there is not an issue with connections?

A hot air gun or some freeze mist my help to localize the problem
Last edit: 23 Nov 2020 23:06 by PCW.
The following user(s) said Thank You: thefabricator03

Please Log in or Create an account to join the conversation.

More
23 Nov 2020 23:15 #190161 by thefabricator03
Not sure about the connections. I have not touched anything inside the control cabinet or on the plasma unit. Its working fine at the moment, Ill see if I can replicate the issue.

Please Log in or Create an account to join the conversation.

Time to create page: 0.170 seconds
Powered by Kunena Forum