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Youtuber VC Edge put out a video on rebuilding the 1100MX spindle, complete with information on bearings.

https://www.youtube.com/watch?v=8EooLj1NlrY

Hoss,

Your surface grinder made it on HACKADAY on March 13th.

DIY Surface Grinder for making Precision Parts at Home | Hackaday

The way U601A is configured it looks like an integrator. Could they be using this to create a time delay on power up?

I've always looked at my memory as having a 5 year half life. So whatever I have learned and haven't used actively, I will loose half of that knowledge in 5 years. In the next 5 years I would loose...

dever6,

The attached link talks about isolation transformers and their use with oscilloscopes.

<http://www.toddfun.com/2011/04/30/isolation_transformers/>

Also, if you have a dual input...

jalessi

No dice. My system crashes when I press the process button. I pointed to the file you send under the "post files" button. I tried several times and after a reboot or two I get the same...

Does anyone have a post that will work with Arftsoft Mach3Turn and Mach3Mill?

To everyone at GeckoDrive I just want to say thank you for choosing my entry.

Long live the Mini-G.

How about a mini-G kind of like the minibus.

Very cool!!! I can hardly wait.

ddexd

Do the PCB and heatsink count as components (i.e. all the parts to make the G250)?

Thanks,
ddexd

My guess is 119.

Congratulations to Andrey. Mariss, I really thought I had you with the 3rd pad that didn't look like it had solder paste.

Mariss,

I could be wrong, but it looks like you missed 3 solder pads with the solder paste.

ddexd

I wonder if they are phasing out the X2. I just picked one up yesterday for $200. Of course it was the display model, but the only thing missing/wrong with the mill was missing the small handle...

I got ya. I was just thinking in terms of someone else getting your design and incorrectly plugging your board into the motor control board by mistake. That wouldn't be good.

I do see a couple of things on your schematic that may or may not matter.

1) On connector P1 you have 5V and E6V tied together. If you were to plug your board into the original mills motor...

As far as spindle speed goes, I did notice when I was making repairs to the control boards when I bypassed the digital potentiometer that I could get the spindle speed up to 2500+ rpm. With a...

Update, I de-soldered the large blue relay from the motor board and confirmed one set of contacts was welded together. The replacement relay was a Panasonic model number JW2SN-DC24V. I soldered the...

Neil,

I sent you an email with the schematic. Please let me know if I need to make any corrections to the schematic. And yes, the relay is the large blue relay. I found an Omron relay on...

Just figured out why the mill keeps running even with the E-Stop button pressed. After a couple of hours looking at the motor board and contemplating having to reverse engineer a schematic. I...

The UPS man dropped off the electrical upgrade kit from Grizzly. To my surprise the upgrade kit consisted of the following.

1) New motor with wiring harness.
2) New motor board with wiring...

neilw20,

After studying the newer control board it is very clear that the digital potentiometer is wired to be increased / decreased from the switches on the board. It looks like the Atmel chip...

Chrisjh,

The damage might have been significantly reduced because I have my equipment plugged into an GFCI. The day I tried to turn the mill on the GFCI was tripped so it may have provided the...

An update on my repairs.

I found several chips on the Control Board and Motor Board that were either shorted, did not meet the manufacturer’s data sheets, or just replaced outright.

The first...

Yep, checked the emergency switch and it isn't the culprit. I can even hear the relay energize / de-energize when I push the emergency switch or the chip gaurd switch.

Just got a call from Grizzly. They told me that my machine was part of a batch that did not receive some kind of upgrade and that they are sending me the parts for the upgrade.

I have no idea if...

M100,

I have a call into Grizzly for tech support. The person on the phone admitted that he was not an expert on the SX3 and that he would have one of their electrical experts give me a call...

neilw20, thanks for the help.

Just in case the hall sensors are out I went ahead and ordered a few from Digikey. By the way the Allegro A3141 hall sensors have been replaced with an updated model...

Chrisjh I sure could use your help.

I need help with a problem with my SX3. When I turn the power on to the mill the green power indicator light comes on, the spindle speed LCD display blue...