motor problem

[clammy23]

hello everyone I have been looking around the forums when i get the chance to and i have been seeing a lot of good stuff there. i am new to cnc and iwill to build one that can work with wood ,plastic and alluminum.
I have started to collect some parts mainly motors all of which has 6 wires and the following specs.
dc 2.46v
1.82A 1.8deg/step brand name: step-syn

can i use this type of stepper motor? and which tpe of controller board i will have to use. thank you.

[Oldmanandhistoy]

Hi,
Yes the steppers are suitable for cnc use if they have enough torque.
What holding torque do those steppers have?

Do you plan to build your own drives or buy?

John

[clammy23]

hi john,
these motors do not have any writing on torque.check these markings. type:103G771-0611
IBM PN 6185940 INSUL. CLASS B
LOT NO.9313 (these are the ony writing on them)
I have two other motors that have a holding torque of 150 oz 200 steps 2.2Volts 4.6 amps.I wanted to try to build them by if possible by getting the schematics.what other parts i would i have to get.
If it is not possible to go this route iwill have to buy them. what do you suggest.
thanks

[Oldmanandhistoy]

Hi again,

Have you googled those numbers to see if you can find their holding torque? Or maybe some one here might have the details.

IMHO 150 oz in is a little low for what you have stated you wish to cut. Using lead screws or ball screws with a high turns per inch will gain you some power but will also lower your feed speeds so it would have to be a trade off between power and speed. Also you will need the speed for cutting wood but you will need the power for aluminium. So it may be a case of one or the other.
How big a machine are you thinking of making?

As for the drives; have you had a look at Pminmo site? Take a look here http://www.cnczone.com/forums/showthread.php?t=5390 and see if there is anything there for you.

John

[jasoncelia]

Your stepper motors

dc 2.46v
1.82A 1.8deg/step brand name: step-syn
type:103G771-0611

Back in the days when I used to repair such things, I think those motors were used in the IBM printers. I can not remember much about them, only to say you could easily stop them with your hand. Are the motors you have these ones.

https://www.brigarelectronics.com/Me...ry_Code=MOTORS

With the 150oz motors. I agree if you use lead screws and keep the weight to a minimum it may be possible to build a small-ish CNC Router for wood and plastics.


Jason

[clammy23]

thanks for the link. so much info.i came across some plans for the jgro routerand i have decided to start here. i have so much to learn .at least i can follow these plans until iam ready for the controller and software.what do you think john? great plans jgro, good stuff.

[clammy23]

Originally Posted by jasoncelia Your stepper motors dc 2.46v 1.82A 1.8deg/step brand name: step-syn type:103G771-0611 Back in the days when I used to repair such things, I think those motors were used in the IBM printers. I can not remember much about them, only to say you could easily stop them with your hand. Are the motors you have these ones. https://www.brigarelectronics.com/Me...ry_Code=MOTORS With the 150oz motors. I agree if you use lead screws and keep the weight to a minimum it may be possible to build a small-ish CNC Router for wood and plastics. Jason

yes jason it is the same motor.how small a router i can build with the 150 oz motors and can they be used with the jgro cnc router.I like this design and i think i am going to start here.

[Oldmanandhistoy]

Hi,

I have not studied the jgro plans myself but have heard lots of good things about the design and where a first build is concerned I would think it is a good place to start. I will say that as far as I know there has been some improvements to the design by other members so would be worth your time having a look around for them and if easy implemented added to your design.

The idea of having 3 bearings around each pipe would double the rigidity for a start.
Take care when choosing screw shaft if you want to use the 150 oz in steppers and remember if you do it will have to be a compromise between speed and power. I do not think the design lends its self to cutting aluminium so go more for speed than power you will need all the speed you can get for cutting wood and if you are low on power you can always take lighter cuts.

John

[Oldmanandhistoy]

150 oz in steppers now you have them use them and if they do not have the required power then change them as and when you can.

[clammy23]

thanks john. iwill let you know my progress when i start.