Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Thanks Tony,
pot3 is used to set nominal welding current. What i suspect is the arc force control is the feedback circuit after GOO3 on schematics 3. Not sure if complete disable by shortening output of GOO3 will happen, will try and share results.
I'll start scoping different signals and will...
There's no control on front plate to control arc force, and I'm not sure which part od the control logic is doing this "feature". I'm assuming that there's a pin on control module for this purpose.
Here attached are diagrams from similar welder. Any help in identifying arc force is welcomed.
I have the tools, and can make the schematics (during today I've identified a schematics which seem almost identical to what i have, hmm I'm not allowed to share a link), but there are too many unknowns to me why the selected solution is chosen and why the control module has so many pins and...
The module controls mini REL welder Ingco MMA16015.
It is most likely design flaw since there are others reporting that the set current on display is not accurate and deviates 10-20%. That's not an issue, it is annoying that when the current is set below 90A is not steady but fluctuates 5%-40%...
Hi,
I'm looking for welder control module pin description and if possible schematic of the module from attached picture. The welder is currently overshooting set current and on currents below 90A the output current is not steady but fluctuates quite significantly. This "behavior" is seen even...
Fully agreed, on all points, to go even more deeper:
- PCB copper thickness to be as high as possible
- Keep direct lines between bypass capacitors and component that is "bypassed"
- Not only paralleling capacitors with same values, it is great tactics to parallel capacitors with different...
Not an easy task, fully agreed, the linear stage after the SMPS should remove some of the noise, as proposed in Elektor article (that article seem like a great choice for me, limitation i see is current output set to max 1A. I can run a set of calculations/simulations to reach 3A, but would like...
Hi,
I'm looking into a modern design for a DIY bench top power supply 0-30V/0-3A with topology SMPS - Linear with some modern components (something similar to the design presented in Elektor from Sep 2014).
I'd like to avoid solutions with LM723 or similar designs since i consider them obsolete...
Hi,
I'd like to connect an external embedded IoT device via cable to iPhone and control the IoT device via application on iPhone. Is there any of the shelf component/interface that can be used for this purpose?
For Android based phones there's a possibility to connect a device exposed as Android...
This is display which exposes information on current that will be generated when welding starts.
The measurement is done by a feedback towards the control electronics taken from shunt resistor. So, the display shows preset current that should be maintained, and the control logic compares the...
Thanks for the reply which is valuable when i'll get a sense about the used materials.
However, since my engineering mindset pushes me to have right numbers which correspond with the actual current flowing for the sake of clarity, calibration will be the way forward. Knowing the right numbers...
Hi,
I've recently purchased a super cheap, most likely Russian IGBT based welding inverter named "Уралмаш Inverter MMA-300" that should be capable of delivering 300A, but the setting knob and value on display does not seem to be real (measured current with clamp shows significantly lower...
Hi,
I've tried to charge the laptop using 5V USB cable, not a smart movement, and now the USB ports do not work. It seem that the ports do not provide 5V to the devices any more.
Any tip how to fix it or a schematic of the laptop?
Thanks.
Hello,
I need to use SDCARD on an embedded system on which data on the SDCARD should be protected from erasure by using standard PC with Windows or Linux. In the specification there's something mentioned on this topic but it is unclear to me if protection functionalities are supported by default...
I'm not sure where the code can be found for YAFFS2 (i've been using it on a project few years ago). It has version for Linux and OS Free version (i assume that you do not use OS).
The Uboot embedded loader code has a lot of FS's into the code tree which can be used to make your own port. There...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
