The MPG is a nonessential option so you can take a chance on the cheap route, especially if this is for hobby use. If it dies you can get along with the regular jog until you find a better one.

Hi,
I use a service that is run by the New Zealand Postal service. They maintain a warehouse in Portland, Oregon. As a participating customer I have any US items shipped to
Oregon, usually $15-$20USD, and then the service kicks in, they tell me how its going to cost to get to New Zealand and also the New Zealand Good and Services Tax (15%),
I pay them and it turns up on my doorstep about 10 days later. Too easy!

For example the MPG I bought was $26USD, plus 14$USD shipping to Oregon or $60NZD. I paid NZ Post $39NZD for shipping to New Zealand and the tax. Not cheap, but not really expensive either,
and certainly very convenient.

Craig

Hi,

The MPG is a nonessential option so you can take a chance on the cheap route, especially if this is for hobby use. If it dies you can get along with the regular jog until you find a better one.

I use my machine multiple times a day, and not having a reliable pendant is a PITA, not a show stopper but bloody inconvenient....and that's why I went to the effort to
make my own.....its as reliable as I design it to be......with the only real unkown being the MPG itself, and for that purpose Japanese quality just can't be beat.

Craig

Alright, will return these mpgs tomorrow and ordered some of the Sensei brand Craig suggested (23 dollars each). Will be here in a week.

Thanks again everyone,

I'll do all the same tests when the new ones arrive and in the mean time I'll go purchase a 12V power supply for the new ones coming.

I'll update with voltages and outcomes soon!

- Kyle

Hi,
my new mill has Delta servos and has 24VDC signaling. I wired 24V to the pendant, and have a LM8712 regulator to drop the 24VDC down to
12VDC for the MPG. The MPG outputs both source and sink current, but not much, they have an output impedance of around 10kOhm.
I run the outputs into the bases of two NPN transistors so that the collectors could sink 24V and signal my BoB. To pull the BoB low requires
5mA, an the AB outputs of the MPG cannot do that directly.

Craig

I dont really know what that means Craig hahaha 🤔

Hi,
what it means is the outputs of the MPG are fairly weak and you may require some buffering between the outputs and your BoB
inputs. In my case I just used a single NPN transistor, 2 cents each variety....

Craig

Okay, well I use a C10 breakout board.

I dont know If this board will need NPN transistors? (I don't even know what that is either).

Hi,
the C10 shows a 4.7kOhm pull-up/pull-down resistor, so the input impedance will be around 4.2kOhm.
You'll just have to try the AB outputs of the MPG, they may be enough to trigger the BoB, but then again maybe not.
My recollection when designing/building my pendant was that to output impedance of the AB outputs was 10kOhm.

Craig

Thanks Craig.

As for transistors, something like this work?

https://www.amazon.ca/200Pcs-Transistors-Values-Power-Assortment/dp/B07X62PBMH/ref=asc_df_B07X62PBMH/?tag=googlemobshop-20&linkCode=df0&hvadid=459552105769&hvpos=&hvnetw=g&hvrand=8589472011198456784&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=20113&hvtargid=pla-1363671464521&psc=1

Also, as for wiring one in.

I would go the AB outputs to the Collector terminal on transistor, the emitter pin would go to Bob and the base pin needs another input.

Would I just run a separate 12V current to the base pin (given the mpgs are 12V?) Or would I just run a 5V current to it cause the BoB is 5V?

Or would I need a different voltage all together?