Messages

11

General Mach Discussion / Re: Help on wiring an E-stop in.

« on: May 06, 2009, 03:05:54 PM »

Thanks for the information folks as have set up the E-stop on the AC side of the PSU and going to get a second 2 pole NC to put in the box to wire to the BOB.

Michael

12

General Mach Discussion / Help on wiring an E-stop in.

« on: May 06, 2009, 04:51:14 AM »

I have a 2 pole NC E-stop that I want to wire into my system for safety. I am using a BOB from DIYCNC which is their PCPPS-3PS (power save) and their driver 25PS model on all three axi'. They can be viewed at www.diycnc.co.uk. for layout and Pdf on information I am using a regulated 24V PS with 3 lead points. So what I am asking is where is the best place to wire in the E-stop.

Wiring between the Mains plug and the power supply ensures that power is shut off when I hit the switch and allows me to wire the limit switches to the board and keep them as separate controls (personally a good idea in my book). The E-stop has one 2NC switch in it and space for a second one if need be. Wiring a second one in would allow for information going back to the BOB, but if the E-stop is before the PSU why would it be needed as that seems a bit too redundant to me (still learning, if there is a reason please explain).

So, any and all help or input would be helpful diagrams would be greatly appreciated as tend to be a visual person (though if given good reference points can figure alot out).

Michael

13

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 18, 2009, 05:54:53 AM »

Okay, Here is what I have going on with the motors and the system:

23HS8603 which from Stepperworld are said to be 190 oz-in 6.75V 1.5A Unipolar six wire Motors. The information from Motion King (the firm which produces them matches with the exception of them being 140 Ncm motors. The webpage with technical info is: http://www.motionking.com/Products/Hybrid_Stepper_Motors/23HS_Stepper_Motor_57mm_1.8degree.htm .

The Drivers/Breakout board is a Stepperworld FET3 Dynamo using the power supply that comes with it (a computer PSU 650W) and set up with twelve volt and running inline 1.5 Ohm 50W resistors with one per centre tap (two total/motor). It has an indepedent 5V wired to the board from PSU for logic. Schematic can be seen at the file that i loaded of it awhile ago to the site (look for uploads by me as it is the only one there). Information on it can be had at: http://stepperworld.com/FET3dynamo.htm .

The Router is a World of CNC (Marchant Dice) MDL-2-TR-UN. Which can be seen here:http://www.worldofcnc.com/products.asp?recnumber=194 . One item that I would mention is that a tighting order was not sent with the unit (an order with which it is prefered to tighten the bolts down for truing the unit after shipping). This cost me a good bit of time in getting the unit fully true.

I am using Mach3 and have had good response via both laptop and Desk top units (until Windows ate its lunch on the Desk top and been using the laptop currently) Setting are:

PIN2 = X Direction
PIN3 = X Step
PIN4 = Y Direction
PIN5 = Y Step
PIN6 = Z Direction
PIN7 = Z Step
PIN14 = Enable 1
PIN16 = Enable 2
PIN17 = Enable 3

E Stop is emulated at present

Motors are running at between 135 to 148 steps per unit speed is running from 225 on Z, 300 on X, to 550 on Y mm/Min as stable. This is in half step mode. High Torque is very choppy at these setting and Wave will not move at these setting except Y which goes very choppy. Acceleration is 4 to 5mm/sec/sec last two setting on Mach3 tuning page are 0,0. Tunig was done using and rechecking Mach3 tuner for the steps per unit. Units are mm.

When starting up must start Mach3 before starting break out board or won't see all the motors. Yet if I turn of driver?BOB and do any hardware changes (change from step to one of the other two settings) it will drop one or more motors. Current pulses are set at 25K.

Currently even on a cold start up it is not always picking up all three motors. The clicking sound when it was running all three motors but not stepping X at all was coming from the X motor and I could assist it by hand to turn in the direction of motion it needed to go. This has me believing that the motors maybe be used or not of high quality or just plain not functioning properly.

Items Looking at:

   1. Has the motors crapped out (even though I bough them less than six months ago)? I have put less than 10 hours of run time on them.
   2. Do I need to increase the Pulse rate to give a better signal to the system and therefore allow better control of the motors?
   3. Do I need to go to a dedicated PSU that has 12V or 24V power output available? (the system is rated for 12V I know. I don't know if it will handle higher without finding a way to cool the FET's)
   4. Changing the BOB which entails a whole mess in and of itself (and is not really wanted ATM, but will be done in the hopefully near future, contract first, upgrades second)

Hopefully all this detail will help those of you who can help me get this thing corrected and on line.

Michael

14

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 14, 2009, 04:22:59 PM »

I HATE WINDOWS.

The system did a complete flake today for reasons unknown. I am currently rebuilding it and getting everything re-installed including Mach3 (Keeping notes outside the box can never be beaten).

Will update on progress.

Michael

15

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 13, 2009, 11:02:43 AM »

Have gotten Y and Z to move though Y is not moving it's full axis. So started double checking the frame and found loose bolts that I am now having the fun of truing the system and see if that brings the X online as well. Z was running smoothly at 400, 150, 5 and the unit is mm's. So going to try to get everything else trued and see if they will run better.

The Stepper are 23HS8603 and the sheet that came with them states 6.75V 1.5A per phase. Maker states that 5V is enough to drive them.

Any and all inpuit of the positive nature would be a great help.

Michael

16

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 12, 2009, 04:06:58 PM »

Good News found the enable pin set and that is fixed bad news it still does not turn worth a darn and only nudges when I change direction. highest on current test was 500, 50, 7 with no go and that is almost a square signal so don't know Which way to go now on it and need to either pitch them and start manual cutting until a new board gets here that will handle the unipolar until I can upgrade to better (close the contract).

Oh, the cigar goes to Mach 3 yahoo group for old but good information if you mine for it with the right words.

Michael

17

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 12, 2009, 10:34:54 AM »

Okay,

Being that getting new drives wil take a bit of time from order to arrival is there any way of checking which is the problem and getting it fixed so that the system will work?

The Router will be cutting hard woods only to begin with and that is where I am sitting at right now. Having been able to do further reseacrch now that I know where to go looking. I would probably not have bought them and gone with a maker here in the UK, mainly to have local access.

So what needs to be done to get them online? Whether or not they are "good" motors or drives is of little importance at the moment. Finding away to get the system running so that i don't have to do all the work on the cuts by hand control (That costs alot of time and requires additional finish work to insure quality standards are met at the level they need to be.

Thanks for all the information and input. How can I go about checking them and getting the system and running. It came with one 1.5Ohm resistor to be used with 5V and states that the board can handle 12V no problem (the FET's are rated higher) the board is inside a aluminum box on whic the resistor are mounted by screws with thermal compound on their undersides and cooling blades on top. I have mounted a a heatsink on the sides of the motors as better safe than sorry. I am running 12V in the stepper mode and having no joy with tuning or getting the motors to move. They are making sound just not moving.

They will move under hand control both with power on and off. I have Lo active as it needed that just to get the motors to start responding somewhat is there additional information or pins I need to activate (There are options on the board for active lo settings but it is a single pin and does not tell if it is for step or direction or the schematics). So any help would be greatly appreciated. Saying that i have gone down a dead end , while might be acturate in some ways does not get a solution found.

Michael

18

General Mach Discussion / Re: Problem with stepper motors (have looked through archives)

« on: April 10, 2009, 04:51:00 PM »

Stepperworld FET3 Dynamo Board which is a three in one board with MOSFET on all three axis. Hope that helps a bit.

Michael

19

General Mach Discussion / Problem with stepper motors (have looked through archives)

« on: April 10, 2009, 03:24:09 PM »

Okay,

I am running a Gantry router with just starting set up. The problem is that the motors are not moving and having a problem with the tuning them to get them running. I am getting sound from them but no motion. Sound changes when I change settings in either Mach3 or on the board switches so that is good. Wiring on the step motors is two centre taps attached to two pairs (two groups of three) and are wired as shown on diagram provided by maker with a 1.5 ohm 50W resistor inline of each centre tap and running 5V for logic and 12V for the combined XY with a separate 12V for the Z. The maker provided one to be used with both tap wires at 5V. All four are mounted to a metal base with thermal paste and three heat sink blades are on top of them.

PIN2 = X Direction
PIN3 = X Step
PIN4 = Y Direction
PIN5 = Y Step
PIN6 = Z Direction
PIN7 = Z Step

Active Lo is enabled. When I have the system running can still turn the arbour of the stepper motor. When power is off can also turn them and turns arbour as well. I have tried the 500, 50, 5 setting on the tuning controls with no results. Have read through the posts with alot of information gotten (thanks to all who answer them) but no joy in movement on them the number on the side of the steppers is 23HS8603 and all bear the same numbering set.

So any ideas on what can be done to make the motors work?? System is running of both a laptop and a desk top with the same problem. So, please help. this is going to be helping with production of musical instruments for a client and really need to get it working.

Thanks,

Michael