Well Richard, the Anihiem people called and after much wrangling we decided I was to pay the 90 dollars, so it is on the way. I was rereading your posts and I ran across this post with the web address, I ignored the this address the first time around thinking I already had this. This time I click on to be sure and I'm glad I did, this file has a lot more info. I'll work on what you suggested while waiting.

thanks

bill

----- Original Message -----

From: rtstofer

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 7:33 PM

Subject: [piclist] Re: sinking inputs or sourcing inputs

Bill, For this driver you have a jumper choice to make per page 2 of the User Guide here: http://www.anaheimautomation.com/manuals/L010177%20-% 20MBC25081TB%20Users%20Guide.pdf See Notes: ... So, if you install the JP1 jumper at position 1-2, the driver will assume you are going to pull the inputs low to make them active. If you install the jumper at position 2-3 the driver will assume you are going to pull the inputs high to make them active. Active/inactive are defined in the adjacent table. So, the thing is, it doesn't matter which way you want to think about the inputs to the driver; active high or active low. Your choice. Richard

----- Original Message -----

From: rtstofer

To: p...@yahoogroups.com

Sent: Monday, January 23, 2006 9:11 AM

Subject: [piclist] Re: sinking inputs or sourcing inputs

Bill, You know, there is nothing wrong with actually using switches as shown in the datasheet. In fact, there is every good reason to not connect the PIC to the circuit until everything is debugged. The downside is that the clock input will probably bounce and you will get more than one step per operation. But that's not important. If you decide to try this, install the jumper such that the inputs are held high and pulled to ground with the switches - connection 1- 2. This way you won't even need pull-up resistors or any power source other than the motor supply.
Ok, I'm to wire it up as per sinking inputs diagram with maybe a push on button switch between pins 2-3 so as to bump/pulse one full step(ms1 and ms2 pull high) with the motor connected and 12dcv? supplied to pins 6-7.
I'm still waiting for the driver. I'll try this if this is correct.
thanks
bill Richard --- In p...@yahoogroups.com, "Bill Davis" <wdavis@g...> wrote: > > Richard, that help clear things. I've seen the jumper 2-3 and I was not clear about that. I just wasn't clear at all about the input voltage pins 6-7. > thanks for clear that up > bill > ----- Original Message ----- > From: rtstofer > To: p...@yahoogroups.com > Sent: Sunday, January 22, 2006 8:45 PM > Subject: [piclist] Re: sinking inputs or sourcing inputs> > Bill, > > The sourcing/sinking thing is only about the logic signals driving > the stepper driver chip and has nothing to do with the motor. The > only choice you have to make is whether your logic signals are +5 > for true or 0 for true according to the truth table. > > I think you should jumper 2-3 and use the positive true outputs from > the 16F88 to control the chip. If you don't make any connections to > MS1 and MS2 they will be 'inactive' and you will get 1/8 steps. > > On the output side, you may have an issue. The input voltage has to > be between 12 and 24 volts (not 5V). It is quite common to run > steppers at a much higher voltage than nameplate but I'm not up to > speed on what to do here. You also have a minimum current > requirement of 0.5A > > I would put a couple of 20 ohm 5W resistors (0.6A) in place of each > motor winding, connect the 16F88 (don't forget that logic ground and > motor ground must be tied together), turn it on and watch the > voltages on the resistors. Initially, I would just measure to > ground. > > Then I would try a motor. According to the datasheet the driver is > current limited. So, pick a motor rated at 12V or less and 0.5A or > more and you should be fine. Depending on your motor, you can > probably skip the resistor test. I'm just overly cautious... > > Print and read carefully the entire datasheet. It is one of the > better ones around and is quite detailed on the motor connections. > > Richard > > --- In p...@yahoogroups.com, "Bill Davis" <wdavis@g...> wrote: > > > > > > ----- Original Message ----- > > From: JCullins > > To: p...@yahoogroups.com > > Sent: Sunday, January 22, 2006 4:50 PM > > Subject: Re: [piclist] sinking inputs or sourcing inputs > > > > > > Sinking means you give a ground to turn it on and sourcing mean > you give it a voltage ( probably 5v ) It sounds like it has opto > isolation so you could drive either way, some chips do better > driving low rather that high. > > Jim > > Would I be in trouble if I try to a motor at 5dcv at 2.5 A by > sourcing through F88 chip? > > bill > > ----- Original Message ----- > > From: wdavis364 > > To: p...@yahoogroups.com > > Sent: Sunday, January 22, 2006 12:25 PM > > Subject: [piclist] sinking inputs or sourcing inputs > > > > > > I'm looking at the datasheet on MBC25081TB steppermotor driver > by > > Anihiem Automation. It shows two pinout diagrams one for > sinking > > inputs and the other for sourcing inputs which are an the same > pins. > > Will someone tell me what is meant by sinking and sourcing > inputs? > > thanks > > bill > > > > > > > > > > > > > > to unsubscribe, go to http://www.yahoogroups.com and follow > the instructions > > > > > > > > --------------------------- ---- > --------- > > YAHOO! GROUPS LINKS > > > > a.. > > > > > > --------------------------- ---- > --------- > > > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions> > SPONSORED LINKS Microcontroller Microprocessor Microchip pic > Microcontrollers Picmicro Pic microcontrollers > ------------------------------- ----------- > YAHOO! GROUPS LINKS > > a.. > ------------------------------- -----------

Bill, You know, there is nothing wrong with actually using switches as shown in the datasheet. In fact, there is every good reason to not connect the PIC to the circuit until everything is debugged. The downside is that the clock input will probably bounce and you will get more than one step per operation. But that's not important. If you decide to try this, install the jumper such that the inputs are held high and pulled to ground with the switches - connection 1- 2. This way you won't even need pull-up resistors or any power source other than the motor supply. Richard --- In piclist@picl..., "Bill Davis" <wdavis@g...> wrote: > > Richard, that help clear things. I've seen the jumper 2-3 and I was not clear about that. I just wasn't clear at all about the input voltage pins 6-7. > thanks for clear that up > bill > ----- Original Message ----- > From: rtstofer > To: piclist@picl... > Sent: Sunday, January 22, 2006 8:45 PM > Subject: [piclist] Re: sinking inputs or sourcing inputs > > Bill, > > The sourcing/sinking thing is only about the logic signals driving > the stepper driver chip and has nothing to do with the motor. The > only choice you have to make is whether your logic signals are +5 > for true or 0 for true according to the truth table. > > I think you should jumper 2-3 and use the positive true outputs from > the 16F88 to control the chip. If you don't make any connections to > MS1 and MS2 they will be 'inactive' and you will get 1/8 steps. > > On the output side, you may have an issue. The input voltage has to > be between 12 and 24 volts (not 5V). It is quite common to run > steppers at a much higher voltage than nameplate but I'm not up to > speed on what to do here. You also have a minimum current > requirement of 0.5A > > I would put a couple of 20 ohm 5W resistors (0.6A) in place of each > motor winding, connect the 16F88 (don't forget that logic ground and > motor ground must be tied together), turn it on and watch the > voltages on the resistors. Initially, I would just measure to > ground. > > Then I would try a motor. According to the datasheet the driver is > current limited. So, pick a motor rated at 12V or less and 0.5A or > more and you should be fine. Depending on your motor, you can > probably skip the resistor test. I'm just overly cautious... > > Print and read carefully the entire datasheet. It is one of the > better ones around and is quite detailed on the motor connections. > > Richard > > --- In piclist@picl..., "Bill Davis" <wdavis@g...> wrote: > > > > > > ----- Original Message ----- > > From: JCullins > > To: piclist@picl... > > Sent: Sunday, January 22, 2006 4:50 PM > > Subject: Re: [piclist] sinking inputs or sourcing inputs > > > > > > Sinking means you give a ground to turn it on and sourcing mean > you give it a voltage ( probably 5v ) It sounds like it has opto > isolation so you could drive either way, some chips do better > driving low rather that high. > > Jim > > Would I be in trouble if I try to a motor at 5dcv at 2.5 A by > sourcing through F88 chip? > > bill > > ----- Original Message ----- > > From: wdavis364 > > To: piclist@picl... > > Sent: Sunday, January 22, 2006 12:25 PM > > Subject: [piclist] sinking inputs or sourcing inputs > > > > > > I'm looking at the datasheet on MBC25081TB steppermotor driver > by > > Anihiem Automation. It shows two pinout diagrams one for > sinking > > inputs and the other for sourcing inputs which are an the same > pins. > > Will someone tell me what is meant by sinking and sourcing > inputs? > > thanks > > bill > > > > > > > > > > > > > > to unsubscribe, go to http://www.yahoogroups.com and follow > the instructions > > > > > > > > --------------------------- ---- > --------- > > YAHOO! GROUPS LINKS > > > > a.. > > > > > > --------------------------- ---- > --------- > > > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > SPONSORED LINKS Microcontroller Microprocessor Microchip pic > Microcontrollers Picmicro Pic microcontrollers > ------------------------------- ----------- > YAHOO! GROUPS LINKS > > a.. > ------------------------------- ----------- >

Richard, that help clear things. I've seen the jumper 2-3 and I was not clear about that. I just wasn't clear at all about the input voltage pins 6-7.

thanks for clear that up

bill

----- Original Message -----

From: rtstofer

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 8:45 PM

Subject: [piclist] Re: sinking inputs or sourcing inputs

Bill, The sourcing/sinking thing is only about the logic signals driving the stepper driver chip and has nothing to do with the motor. The only choice you have to make is whether your logic signals are +5 for true or 0 for true according to the truth table. I think you should jumper 2-3 and use the positive true outputs from the 16F88 to control the chip. If you don't make any connections to MS1 and MS2 they will be 'inactive' and you will get 1/8 steps. On the output side, you may have an issue. The input voltage has to be between 12 and 24 volts (not 5V). It is quite common to run steppers at a much higher voltage than nameplate but I'm not up to speed on what to do here. You also have a minimum current requirement of 0.5A I would put a couple of 20 ohm 5W resistors (0.6A) in place of each motor winding, connect the 16F88 (don't forget that logic ground and motor ground must be tied together), turn it on and watch the voltages on the resistors. Initially, I would just measure to ground. Then I would try a motor. According to the datasheet the driver is current limited. So, pick a motor rated at 12V or less and 0.5A or more and you should be fine. Depending on your motor, you can probably skip the resistor test. I'm just overly cautious... Print and read carefully the entire datasheet. It is one of the better ones around and is quite detailed on the motor connections. Richard --- In p...@yahoogroups.com, "Bill Davis" <wdavis@g...> wrote:> ----- Original Message ----- > From: JCullins > To: p...@yahoogroups.com > Sent: Sunday, January 22, 2006 4:50 PM > Subject: Re: [piclist] sinking inputs or sourcing inputs> Sinking means you give a ground to turn it on and sourcing mean you give it a voltage ( probably 5v ) It sounds like it has opto isolation so you could drive either way, some chips do better driving low rather that high. > Jim > Would I be in trouble if I try to a motor at 5dcv at 2.5 A by sourcing through F88 chip? > bill > ----- Original Message ----- > From: wdavis364 > To: p...@yahoogroups.com > Sent: Sunday, January 22, 2006 12:25 PM > Subject: [piclist] sinking inputs or sourcing inputs> I'm looking at the datasheet on MBC25081TB steppermotor driver by > Anihiem Automation. It shows two pinout diagrams one for sinking > inputs and the other for sourcing inputs which are an the same pins. > Will someone tell me what is meant by sinking and sourcing inputs? > thanks > bill> > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions> > ------------------------------- --------- > YAHOO! GROUPS LINKS > > a.. > ------------------------------- ---------

Yes you would be in trouble. The F88 chip will only handle about .02 amps .

You need to drive a transistor and let it sink the current through the motor winding.

I don't know what you are trying to move with the stepper motor but. You wont get much speed

from a 5v stepper driving with 5v. You need to drive it with about 50v dc and limit the current. It is not as simple as it first appears. You really need to use a stepper drive to handle the motor.

But then again it depends on what you want to use in on.

Jim

----- Original Message -----

From: Bill Davis

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 7:39 PM

Subject: Re: [piclist] sinking inputs or sourcing inputs

----- Original Message -----

From: JCullins

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 4:50 PM

Subject: Re: [piclist] sinking inputs or sourcing inputs

Sinking means you give a ground to turn it on and sourcing mean you give it a voltage ( probably 5v ) It sounds like it has opto isolation so you could drive either way, some chips do better driving low rather that high.

Jim

Would I be in trouble if I try to a motor at 5dcv at 2.5 A by sourcing through F88 chip?

bill

----- Original Message -----

From: wdavis364

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 12:25 PM

Subject: [piclist] sinking inputs or sourcing inputs

I'm looking at the datasheet on MBC25081TB steppermotor driver by Anihiem Automation. It shows two pinout diagrams one for sinking inputs and the other for sourcing inputs which are an the same pins. Will someone tell me what is meant by sinking and sourcing inputs? thanks bill

Bill, The sourcing/sinking thing is only about the logic signals driving the stepper driver chip and has nothing to do with the motor. The only choice you have to make is whether your logic signals are +5 for true or 0 for true according to the truth table. I think you should jumper 2-3 and use the positive true outputs from the 16F88 to control the chip. If you don't make any connections to MS1 and MS2 they will be 'inactive' and you will get 1/8 steps. On the output side, you may have an issue. The input voltage has to be between 12 and 24 volts (not 5V). It is quite common to run steppers at a much higher voltage than nameplate but I'm not up to speed on what to do here. You also have a minimum current requirement of 0.5A I would put a couple of 20 ohm 5W resistors (0.6A) in place of each motor winding, connect the 16F88 (don't forget that logic ground and motor ground must be tied together), turn it on and watch the voltages on the resistors. Initially, I would just measure to ground. Then I would try a motor. According to the datasheet the driver is current limited. So, pick a motor rated at 12V or less and 0.5A or more and you should be fine. Depending on your motor, you can probably skip the resistor test. I'm just overly cautious... Print and read carefully the entire datasheet. It is one of the better ones around and is quite detailed on the motor connections. Richard --- In piclist@picl..., "Bill Davis" <wdavis@g...> wrote: > > > ----- Original Message ----- > From: JCullins > To: piclist@picl... > Sent: Sunday, January 22, 2006 4:50 PM > Subject: Re: [piclist] sinking inputs or sourcing inputs > Sinking means you give a ground to turn it on and sourcing mean you give it a voltage ( probably 5v ) It sounds like it has opto isolation so you could drive either way, some chips do better driving low rather that high. > Jim > Would I be in trouble if I try to a motor at 5dcv at 2.5 A by sourcing through F88 chip? > bill > ----- Original Message ----- > From: wdavis364 > To: piclist@picl... > Sent: Sunday, January 22, 2006 12:25 PM > Subject: [piclist] sinking inputs or sourcing inputs > I'm looking at the datasheet on MBC25081TB steppermotor driver by > Anihiem Automation. It shows two pinout diagrams one for sinking > inputs and the other for sourcing inputs which are an the same pins. > Will someone tell me what is meant by sinking and sourcing inputs? > thanks > bill > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > ------------------------------- --------- > YAHOO! GROUPS LINKS > > a.. > ------------------------------- --------- >

----- Original Message -----

From: JCullins

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 4:50 PM

Subject: Re: [piclist] sinking inputs or sourcing inputs

Sinking means you give a ground to turn it on and sourcing mean you give it a voltage ( probably 5v ) It sounds like it has opto isolation so you could drive either way, some chips do better driving low rather that high.

Jim

Would I be in trouble if I try to a motor at 5dcv at 2.5 A by sourcing through F88 chip?

bill

----- Original Message -----

From: wdavis364

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 12:25 PM

Subject: [piclist] sinking inputs or sourcing inputs

I'm looking at the datasheet on MBC25081TB steppermotor driver by Anihiem Automation. It shows two pinout diagrams one for sinking inputs and the other for sourcing inputs which are an the same pins. Will someone tell me what is meant by sinking and sourcing inputs? thanks bill

Bill, For this driver you have a jumper choice to make per page 2 of the User Guide here: http://www.anaheimautomation.com/manuals/L010177%20-% 20MBC25081TB%20Users%20Guide.pdf See Notes: ... So, if you install the JP1 jumper at position 1-2, the driver will assume you are going to pull the inputs low to make them active. If you install the jumper at position 2-3 the driver will assume you are going to pull the inputs high to make them active. Active/inactive are defined in the adjacent table. So, the thing is, it doesn't matter which way you want to think about the inputs to the driver; active high or active low. Your choice. Richard

Sinking means you give a ground to turn it on and sourcing mean you give it a voltage ( probably 5v ) It sounds like it has opto isolation so you could drive either way, some chips do better driving low rather that high.

Jim

----- Original Message -----

From: wdavis364

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 12:25 PM

Subject: [piclist] sinking inputs or sourcing inputs

I'm looking at the datasheet on MBC25081TB steppermotor driver by Anihiem Automation. It shows two pinout diagrams one for sinking inputs and the other for sourcing inputs which are an the same pins. Will someone tell me what is meant by sinking and sourcing inputs? thanks bill

Thanks, for the reply

----- Original Message -----

From: john

To: p...@yahoogroups.com

Sent: Sunday, January 22, 2006 3:19 PM

Subject: [piclist] Re: sinking inputs or sourcing inputs

--- In p...@yahoogroups.com, "wdavis364" <wdavis@g...> wrote: > > I'm looking at the datasheet on MBC25081TB steppermotor driver by > Anihiem Automation. It shows two pinout diagrams one for sinking > inputs and the other for sourcing inputs which are an the same pins. > Will someone tell me what is meant by sinking and sourcing inputs? > thanks > billWhen you tie the pin to ground or use a transistor to switch it to ground that's sinking and sourcing is to the positive rail.