What motor should i use from these??

[gurujabbal]

Hello everyone.. i am new to this site and i would like to say its a really great one.. I am looking at building a mechmate cnc machine and was wondering what would be the best choice of motor from these running on a Geckodrive 203V driver, any info would be really helpful.

http://www.kelinginc.net/kl34H2120-42-8B.pdf

http://www.kelinginc.net/KL34H295-43-8B.pdf

http://www.kelinginc.net/KL34H280-45-8B.pdf

http://www.kelinginc.net/KL23H286-20-08B.pdf

If there are any other suggestions please inform me. Oh by the way is there any post that gives a full breakdown of what you need to build the Mechmate, in terms of drivers,motors,power supply? Tried to search but not too much luck.

Thank you

[myozman]

bowdown,
John @ keling emailed me back with this package:

A: 4 PCS G203V, $139 x 4

B: 4 PCS NEMA 34-906 oz-in Motors (KL34H295-43-8A (Single Shaft), $99 x 4
C: 1 PCS KL-7020, 70V/ 20A,Unregulated Power Supply $189

D:1 PCS C10 Breakout board, E-Stop or Limit Switch can be wired
$25.49
E: 1pcs 5V power supply, $6

Total: $1172.49 + shipping fee

John

MIKE

[gurujabbal]

Hey Mike thanx for the info..How long ago did u get the prices? Also i take it that ur saying that the kit will work well..is it worth it going to the bigger motor size? Power supply should be ok as i can get my hands on one very easily..but rest sounds good.

Thanx again

[myozman]

I was sent the prices two days ago. To get the gecko prices you have to buy their motors. That sounds like a good deal if your going direct drive. I think the power supply could be had cheaper from Antek, And It's not the same breakout board everyone is using with the MechMate, PMDX-122($81).

Everyones setup is unique, so there are a lot of combinations that will work, getting them setup and having someone answer questions, you might be on your own.


MIKE

[Gerald D]

I thought that John of Antek and John of Keling are/is the same John?

[myozman]

Sorry Gerald, didn't know.

[Gerald D]

I am questioning it, not stating it as a fact. "John" is a very busy person?

[gurujabbal]

Hey thanx for the info..ive been doing more research on the issue and i might just settle for the Gecko 203V with the Vexta PK296A2A-SG with the 7.2 geared motor. Its more expensive but i dont really want to buy new motors later on, besides alot of guys on this forum think they are excellent and hopefully because people have used this setup here before I could get tips or any info id need to make them work if i had any problems. I am thinking of running the setup at 70V to 75V and between 1-2 amps. What are you guys running them at? Thanx again for the advise.

GuruJabbal

[smreish]

I am running Gecko 203V with the Vexta PK296A2A-SG with the 7.2 geared motor @ 56V with superb results.
Avg TOP cutting speed with 20T pinions is about 250ipm.
Motors are room temp after an 8hr day of running.
Heatsink with fan keeps box circulation going and everything is room temp cool :)

[revved_up]

I thought the recommended pinion for the 7.2's was the 30 tooth?

[smreish]

I went with the 20t for 2 particular reasons:
- better 3d resolution when carving
- I still get the recommended cutting speed for mdf and still have able low band speed/torque for cutting aluminum.

I may move up to 30t pinions. But for now, all is working really well.
I made one heck of
a mess today resurfacing the table today :) 1.25" Dia bit, 190ipm was a nice chip load.

[myozman]

Sean,
Did build your power supply or buy one? If you boght, which one did you go with?

Mike

I am running Gecko 203V with the Vexta PK296A2A-SG with the 7.2 geared motor @ 56V with superb results.
Avg TOP cutting speed with 20T pinions is about 250ipm.
Motors are room temp after an 8hr day of running.
Heatsink with fan keeps box circulation going and everything is room temp cool :)

[revved_up]

I went with the 20t for 2 particular reasons:
- better 3d resolution when carving
- I still get the recommended cutting speed for mdf and still have able low band speed/torque for cutting aluminum.


Here we go again :D going to have to give this some more thought. I had wanted to build this for more of the 3 (2.5d) carving than for the sheet work thats what I love about this site always keeps me on my toes. at least I didnt order the pinions yet.

[Gerald D]

The basics of the MechMate design is to keep stuff middle-of-the-road, conservative. The idea is that nothing must be on-the-limits. Which means that there should be freedom for mistakes and "personalising" or customising. A direct-drive motor with 20tooth pinion is on the limits - using a geared motor gives some freedom to play with pinions.

[smreish]

PS-6N56R5r12 (http://mechmate.com/forums/toroid-transformer.com/PS-6N56R.pdf) power supply from Antek

This "universal build" power supply was chosen for the following reasons. I say universal because I am building multiple machines for use it my shops. I just wanted flexibility without adding more "stuff" in the box.

56V @ 600W - wattage determined by my use and Mariss's formula (I have 5 geckos with the A axis attached)
12v - for the PMDX and Proximity limit use
5v - for use with the NC Pod (when I move up to this controller)