Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 15 November 2020 12:45:46 Dave Cole wrote: > On 11/13/2020 1:24 AM, Gene Heskett wrote: > > On Thursday 12 November 2020 20:50:10 Dave Cole wrote: > >> Gene, > >> > >> Where did you buy that H bridge board ?  Ebay ? > >> > >> Dave > > > > Yes, Thats a BTS7960 board. I tried it out

Re: [Emc-users] driver for a DC motor for a BS-1.

On 11/13/2020 1:24 AM, Gene Heskett wrote: On Thursday 12 November 2020 20:50:10 Dave Cole wrote: Gene, Where did you buy that H bridge board ?  Ebay ? Dave Yes, Thats a BTS7960 board. I tried it out tonight, ran the motor at about half speed for about half an hour. No detectable heating of

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 12 November 2020 20:50:10 Dave Cole wrote: > Gene, > > Where did you buy that H bridge board ?  Ebay ? > > Dave Yes, Thats a BTS7960 board. I tried it out tonight, ran the motor at about half speed for about half an hour. No detectable heating of the motor or the device. Running on

Re: [Emc-users] driver for a DC motor for a BS-1.

I always suggest that people buy stuff the first few times from a supplier who can offer technical support or at least technical documents and one who is at least on the same continent as you. These guys are the best. Notice they have three tables for low, medium, and high power drivers. And if

Re: [Emc-users] driver for a DC motor for a BS-1.

Gene, Where did you buy that H bridge board ?  Ebay ? Dave On 11/9/2020 5:15 PM, Gene Heskett wrote: On Wednesday 28 October 2020 16:02:51 Gene Heskett wrote: On Wednesday 28 October 2020 14:30:39 Chris Albertson wrote: I bit of information from Polulu's web site. They say.. "*While

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 09 November 2020 19:00:54 Gene Heskett wrote: > On Monday 09 November 2020 18:16:05 Chris Albertson wrote: > > No example hookups? The PDF you linked shows every wire and > > provides source code for software to control the motor.They use > > a pictorial diagram rather than a

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 09 November 2020 18:16:05 Chris Albertson wrote: > No example hookups? The PDF you linked shows every wire and provides > source code for software to control the motor.They use a pictorial > diagram rather than a schematic. > > Then there are two links on the last page of the PDF.

Re: [Emc-users] driver for a DC motor for a BS-1.

No example hookups? The PDF you linked shows every wire and provides source code for software to control the motor.They use a pictorial diagram rather than a schematic. Then there are two links on the last page of the PDF. The first link is to a very easy to follow tutorial that explains a

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 28 October 2020 16:02:51 Gene Heskett wrote: > On Wednesday 28 October 2020 14:30:39 Chris Albertson wrote: > > I bit of information from Polulu's web site. They say.. > > > > "*While VNH3SP30’s over-voltage shutoff doesn’t activate until 36 V, > > in our experience, shoot-through

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 29 October 2020 15:02:16 Gene Heskett wrote: > On Thursday 29 October 2020 14:08:37 Chris Albertson wrote: > > If the motor is expensive or hard to get, keep it and use a driver > > rated for more volts.As said, you can buy four MOSFETS and make > > a driver that is good enough

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 29 October 2020 14:08:37 Chris Albertson wrote: > If the motor is expensive or hard to get, keep it and use a driver > rated for more volts.As said, you can buy four MOSFETS and make a > driver that is good enough for a use-case where A/C mains is available > and you are not

Re: [Emc-users] driver for a DC motor for a BS-1.

If the motor is expensive or hard to get, keep it and use a driver rated for more volts.As said, you can buy four MOSFETS and make a driver that is good enough for a use-case where A/C mains is available and you are not trying to squeeze every drop of power from a battery. Homemade h-bridges

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 28 October 2020 16:42:30 Chris Albertson wrote: > Looks like you should buy a few MOSFETS and make an h-bridge. But > driving the lower side of the h-bridge from 5 volt logic level is not > super easy. > > Either that or just use a 12Volt motor > It took me 4 months to buy that 24

Re: [Emc-users] driver for a DC motor for a BS-1.

Looks like you should buy a few MOSFETS and make an h-bridge. But driving the lower side of the h-bridge from 5 volt logic level is not super easy. Either that or just use a 12Volt motor On Wed, Oct 28, 2020 at 1:05 PM Gene Heskett wrote: > On Wednesday 28 October 2020 14:30:39 Chris

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 28 October 2020 14:30:39 Chris Albertson wrote: > I bit of information from Polulu's web site. They say.. > > "*While VNH3SP30’s over-voltage shutoff doesn’t activate until 36 V, > in our experience, shoot-through currents make PWM operation > impractical above 16 V.*" Which pretty

Re: [Emc-users] driver for a DC motor for a BS-1.

Forgot a link, sorry. These really are good. ANd they come with a "forever" warranty and "forever" tech support This is the unit I have https://www.basicmicro.com/RoboClaw-2x15A-Motor-Controller_p_10.html They also sell units for single motor control and larger and smaller motor. On mine,

Re: [Emc-users] driver for a DC motor for a BS-1.

I bit of information from Polulu's web site. They say.. "*While VNH3SP30’s over-voltage shutoff doesn’t activate until 36 V, in our experience, shoot-through currents make PWM operation impractical above 16 V.*" This seems reasonable for the intended automotive use case where a lead/acid

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 28 October 2020 04:01:18 Gene Heskett wrote: I can't get anything but a little room heat out of the 420 watter. Reading the chip docs I get the impression there are needed control sigs that are not brought out to the edge of the board. Running at 52 volts in, nothing on the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Tuesday 27 October 2020 09:33:41 Gene Heskett wrote: Hooked up the 420 watt driver. Can't find any input high pass filter, so I am feeding it a low frequency square wave of up to 80 mv peak to peak. It took a couple hours of diligent net search to find a copy of that chips docs.

Re: [Emc-users] driver for a DC motor for a BS-1.

On Tuesday 27 October 2020 04:14:14 Gene Heskett wrote: I put the 2nd one in. The dir signals are solid, going slightly above 5 volts even. The pwm starts outputing pulses at input of .04, either polarity, into the pwmgen value. At that point it is not steady as the pwmgen has decayed into

Re: [Emc-users] driver for a DC motor for a BS-1.

On Tuesday 27 October 2020 00:42:28 Thaddeus Waldner wrote: > Hazarding a guess here so... > > It appears as if you are switching the direction signals at pwm > frequency. This would switch the high side fets and those are slow and > do have high switching losses. The intended design is for the

Re: [Emc-users] driver for a DC motor for a BS-1.

Hazarding a guess here so... It appears as if you are switching the direction signals at pwm frequency. This would switch the high side fets and those are slow and do have high switching losses. The intended design is for the low side fets (controlled by the PWM input) to be off until the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 22:33:36 Chris Albertson wrote: > Gene, I've got a ton of these chips driving motors. They work fine. > Just write the software to the datasheet spec. If the chip is getting > hot and the motor is not mechanically stalled then you are doing > something wrong. For

Re: [Emc-users] driver for a DC motor for a BS-1.

Gene, I've got a ton of these chips driving motors. They work fine. Just write the software to the datasheet spec. If the chip is getting hot and the motor is not mechanically stalled then you are doing something wrong. For debug/development replace the motor with a 100R power resister and

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 20:33:40 Jon Elson wrote: > On 10/26/2020 06:48 PM, Gene Heskett wrote: > > But the switching losses in the olimex board, even at only > > a 1 kilohertz pwm are killers, getting it hot enough to > > burn a finger in just 2 or 3 seconds. So, I need a d2a to > > drive one

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/26/2020 06:48 PM, Gene Heskett wrote: But the switching losses in the olimex board, even at only a 1 kilohertz pwm are killers, getting it hot enough to burn a finger in just 2 or 3 seconds. So, I need a d2a to drive one of the 150 watt class D audio boards after shorting the inputs

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 18:32:00 Jon Elson wrote: > >> On Monday 26 October 2020 14:16:55 Chris Albertson wrote: > >>> 20% PWM duty cycle and a 24V power supply is about 4.8 volts to > >>> the motor. Many DC motors will not move at 20% of rated volts. > >>> I'd not be surprised if it took 10

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 14:16:55 Chris Albertson wrote: 20% PWM duty cycle and a 24V power supply is about 4.8 volts to the motor. Many DC motors will not move at 20% of rated volts. I'd not be surprised if it took 10 or 12 volts to overcome internal friction. A standard test for servo

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 14:56:37 Gene Heskett wrote: > On Monday 26 October 2020 14:16:55 Chris Albertson wrote: > > This is hard to follow because you are referring to pin number on a > > PCB with no schematic. How do these relate to the pins on the > > driver chip? > > Ahh, but the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 14:16:55 Chris Albertson wrote: > This is hard to follow because you are referring to pin number on a > PCB with no schematic. How do these relate to the pins on the driver > chip? Ahh, but the schematic is downloadable from the olimex site. Printed in color on

Re: [Emc-users] driver for a DC motor for a BS-1.

This is hard to follow because you are referring to pin number on a PCB with no schematic. How do these relate to the pins on the driver chip? Also, 10 KHz is at the limit. For initial testing better, I think to work near the midpoint of the acceptable range, perhaps 1KHz. Then after it works

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 22:21:11 Chris Albertson wrote: Advice on the OLIMEX board for a motor driver. I have it wired up, I think. Grounded to system ground on pin 3, system logic 5 volts on pin 2. With complementary 5 volt dirs feeding ENA/ENB on pins 4-5 and a 5 volt pwm on pin 6, the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 21 October 2020 18:54:59 John Dammeyer wrote: > Hopefully the attached photo makes it through. Here's the MC60 > running the 1.5HP 100VDC brushed CW rotation treadmill duty motor. > > Measuring the pot wiper without the flywheel fan weight it starts to > turn at about 0.8V and can

Re: [Emc-users] driver for a DC motor for a BS-1.

Bar the tiny, cheap toy drones, they all use brushless motors because brushes waste about 10% of input energy. > On Oct 20, 2020, at 6:53 PM, John Dammeyer wrote: > > Those are the types used for robots or drones? ___ Emc-users mailing list

Re: [Emc-users] driver for a DC motor for a BS-1.

> From: Gregg Eshelman via Emc-users [mailto:emc-users@lists.sourceforge.net] > > KB makes SCR and PWM motor drives, but rather than spend the $$ for a KB PWM > I'm leaning towards an MC2100 treadmill drive > for my JET 9x20 I put a DC treadmill motor on. Just have to build a PWM > control

Re: [Emc-users] driver for a DC motor for a BS-1.

KB makes SCR and PWM motor drives, but rather than spend the $$ for a KB PWM I'm leaning towards an MC2100 treadmill drive for my JET 9x20 I put a DC treadmill motor on. Just have to build a PWM control circuit to replace whatever would be on the treadmill control panel. The old MC60 treadmill

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 21 October 2020 00:00:07 Scott Harwell via Emc-users wrote: > The KB drives are solid. They have been around for many years and > work well. The last one I used was for an index motor on a large lathe > and it ran for years no problems. I don't think it is fast enough for > a servo.

Re: [Emc-users] driver for a DC motor for a BS-1.

The KB drives are solid. They have been around for many years and work well. The last one I used was for an index motor on a large lathe and it ran for years no problems. I don't think it is fast enough for a servo. Scott H On Tuesday, October 20, 2020, 7:00:00 PM CDT, Dave Cole wrote:

Re: [Emc-users] driver for a DC motor for a BS-1.

> > This is the replacement AC Servo. 110SM-M0630MAL with companion > > drive. 1.8KW, 3000 RPM, 6Nm rated torque, 18Nm peak torque, Peak > > Current 18A and 2500 line encoder. Runs very quietly. > > http://www.autoartisans.com/mill/NewPulleys-1.jpg > > Just in case anyone is interested I

Re: [Emc-users] driver for a DC motor for a BS-1.

I didn't think that we were talking about positioning. I thought you were talking about a spindle drive. I think it could be used as a low performance positioning drive. You would need an opto coupler setup for the command obviously if there is no isolation. I'm not sure that the newer KB

Re: [Emc-users] driver for a DC motor for a BS-1.

Those are the types used for robots or drones? > -Original Message- > From: linux...@rodes.biz [mailto:linux...@rodes.biz] > Sent: October-20-20 4:46 PM > To: 'Enhanced Machine Controller (EMC)' > Subject: Re: [Emc-users] driver for a DC motor for a BS-1. > > Try one of these DC drives.

Re: [Emc-users] driver for a DC motor for a BS-1.

Try one of these DC drives. Work pretty well. I have 3 on my Bridgeport Series II https://www.cytron.io/p-20amp-6v-30v-dc-motor-driver and Amazon has 'em. N. -Original Message- From: Gene Heskett Sent: Tuesday, October 20, 2020 2:33 PM To: emc-users@lists.sourceforge.net Subject:

Re: [Emc-users] driver for a DC motor for a BS-1.

On Tuesday 20 October 2020 16:04:16 Dave Cole wrote: > What about using a common KB Electronics DC drive? > Woot.com (Amazon discount site) is selling one for $89.  I think they > can commonly be found on Ebay as well. > > Dave I haven't got $99 in the 5, 3 different types I'm playing with.

Re: [Emc-users] driver for a DC motor for a BS-1.

> From: Jon Elson [mailto:el...@pico-systems.com] > On 10/20/2020 03:19 PM, John Dammeyer wrote: > > > > I looked at their web site. (google KB Electronic DC drive). Seems like > > pretty nice stuff although I wonder if they would react fast > enough to a closed loop control. If that was

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/20/2020 03:19 PM, John Dammeyer wrote: I looked at their web site. (google KB Electronic DC drive). Seems like pretty nice stuff although I wonder if they would react fast enough to a closed loop control. If that was even wanted. One of the drives does support tachometer feedback.

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/20/2020 03:04 PM, Dave Cole wrote: What about using a common KB Electronics DC drive? Woot.com (Amazon discount site) is selling one for $89. I think they can commonly be found on Note that these drives are NOT isolated from the mains. Anything that doesn't provide isolation for the

Re: [Emc-users] driver for a DC motor for a BS-1.

> From: Mark Johnsen [mailto:m...@ijohnsen.com] > KB electronics is good stuff. Similar to the Minarik DC drives. > Industrial rated... > > Don't know about the reaction time for closed loop, but you could call them > and I'd think their apps engr would have some idea... My experience >

Re: [Emc-users] driver for a DC motor for a BS-1.

KB electronics is good stuff. Similar to the Minarik DC drives. Industrial rated... Don't know about the reaction time for closed loop, but you could call them and I'd think their apps engr would have some idea... My experience (probably limited) has not seen those types of DC drives closed

Re: [Emc-users] driver for a DC motor for a BS-1.

> -Original Message- > From: Dave Cole [mailto:linuxcncro...@gmail.com] > Sent: October-20-20 1:04 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] driver for a DC motor for a BS-1. > > What about using a common KB Electronics DC drive? > Woot.com (Amazon discount

Re: [Emc-users] driver for a DC motor for a BS-1.

What about using a common KB Electronics DC drive? Woot.com (Amazon discount site) is selling one for $89.  I think they can commonly be found on Ebay as well. Dave On 10/19/2020 5:22 PM, grumpy--- via Emc-users wrote: On Sun, 18 Oct 2020, John Dammeyer wrote: Way back in 2003 I started a

Re: [Emc-users] driver for a DC motor for a BS-1.

On Tuesday 20 October 2020 04:05:59 John Dammeyer wrote: > Hi Marcus, > > > -Original Message- > > From: marcus.bow...@visible.eclipse.co.uk > > [mailto:marcus.bow...@visible.eclipse.co.uk] Sent: October-20-20 > > 12:02 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re:

Re: [Emc-users] driver for a DC motor for a BS-1.

Hi Marcus, > -Original Message- > From: marcus.bow...@visible.eclipse.co.uk > [mailto:marcus.bow...@visible.eclipse.co.uk] > Sent: October-20-20 12:02 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] driver for a DC motor for a BS-1. > > On 2020-10-19 23:30, John

Re: [Emc-users] driver for a DC motor for a BS-1.

On 2020-10-19 23:30, John Dammeyer wrote: I haven't looked into what's available from China other than the Bergerda AC Servos I'm using as a mill spindle and will be using as the South Bend Lathe Lead screw upgrade. Can you tell me the model of servo, please. And explain the control device?

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 19 October 2020 17:22:35 grumpy--- via Emc-users wrote: > On Sun, 18 Oct 2020, John Dammeyer wrote: > > Way back in 2003 I started a project to control the surplus tread > > mill motors I had acquired. At that time I was still just casting > > parts for making my Gingery Lathe and

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 22:21:11 Chris Albertson wrote: > Gene, > > Read the first page of the data sheet. It says near the end of the > first page... > > *The speed of the motor can be controlled in all possible conditions > by the > > > PWM up to kHz. In all cases, a low level state on the

Re: [Emc-users] driver for a DC motor for a BS-1.

> -Original Message- > From: grumpy--- via Emc-users [mailto:emc-users@lists.sourceforge.net] > Sent: October-19-20 2:23 PM > To: Enhanced Machine Controller (EMC) > Cc: gru...@mailfence.com > Subject: Re: [Emc-users] driver for a DC motor for a BS-1. > > On Sun, 18 Oct 2020, John

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sun, 18 Oct 2020, John Dammeyer wrote: Way back in 2003 I started a project to control the surplus tread mill motors I had acquired. At that time I was still just casting parts for making my Gingery Lathe and thought about making my own DC Servo motor controller.

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 22:21:11 Chris Albertson wrote: > Gene, > > Read the first page of the data sheet. It says near the end of the > first page... > > *The speed of the motor can be controlled in all possible conditions > by the > > > PWM up to kHz. In all cases, a low level state on the

Re: [Emc-users] driver for a DC motor for a BS-1.

Hi Gene, > From: Gene Heskett [mailto:ghesk...@shentel.net] > On Sunday 18 October 2020 18:35:39 John Dammeyer wrote: > > Yes, one of those clones in BS-1 size. Almost too big for a g0704 due to > its height. But the g0704 seems to handle the weight just fine, which > without the motor is still

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 18:35:39 John Dammeyer wrote: > Hi Gene, > Just to bring this back to real life here. You have one of these > right? > > https://www.amazon.ca/Semi-Universal-Dividing-Vertical-Horizontal-Inde >xing/dp/B00RMLWNHS Yes, one of those clones in BS-1 size. Almost too big for

Re: [Emc-users] driver for a DC motor for a BS-1.

What many people use for those high voltage DC treadmill motors is a MC2100 controller. Those are used in the fancier treadmills that have buttons to tick the speed up and down.There are many schematics and other info on how to build a potentiometer controlled PWM circuit for these or an

Re: [Emc-users] driver for a DC motor for a BS-1.

Gene, Read the first page of the data sheet. It says near the end of the first page... *The speed of the motor can be controlled in all possible conditions by the > PWM up to kHz. In all cases, a low level state on the PWM pin will turn off > both the LSA and LSB switches. When PWM rises to a

Re: [Emc-users] driver for a DC motor for a BS-1.

Hi Gene, Just to bring this back to real life here. You have one of these right? https://www.amazon.ca/Semi-Universal-Dividing-Vertical-Horizontal-Indexing/dp/B00RMLWNHS And you want to control it via CNC right? Given the torque multiplication with the worm gear why aren't you just using a

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 17:44:24 Thaddeus Waldner wrote: > https://www.pololu.com/file/0J52/vnh2sp30.pdf > > > Page 10, center table. Tr is rise time, Tf is fall time. The diagram > on figure 5 two pages down shows the timing as coinciding with

Re: [Emc-users] driver for a DC motor for a BS-1.

https://www.pololu.com/file/0J52/vnh2sp30.pdf Page 10, center table. Tr is rise time, Tf is fall time. The diagram on figure 5 two pages down shows the timing as coinciding with and measured from with the PWM signal coming in. Also on the first

Re: [Emc-users] driver for a DC motor for a BS-1.

On Sunday 18 October 2020 14:23:29 Thaddeus Waldner wrote: > > 1. direction changes are slow. No consequences when driven by the > > human hand running a joystick on the side of the seat, but important > > for computer control. > > Typical delay for changing direction is 600microseconds. This is

Re: [Emc-users] driver for a DC motor for a BS-1.

Way back in 2003 I started a project to control the surplus tread mill motors I had acquired. At that time I was still just casting parts for making my Gingery Lathe and thought about making my own DC Servo motor controller. http://www.autoartisans.com/MotorDrives/MOTOR1-5.JPG The first

Re: [Emc-users] driver for a DC motor for a BS-1.

> 1. direction changes are slow. No consequences when driven by the human > hand running a joystick on the side of the seat, but important for > computer control. Typical delay for changing direction is 600microseconds. This is less than the typical LinuxCNC servo period of 1ms. The reason for

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 12:55:16 Chris Albertson wrote: > Gene just Google the part number "VNH3SP30". Polulu has them. It is > in fact my "go to" driver. These were developed for automotive use > for things like driver seat adjustment motors. > > Polulu's version of this has reverse

Re: [Emc-users] driver for a DC motor for a BS-1.

There's a reason why the LinuxCNC mailing list is one of the few mailing lists that I get to my inbox and read frequently. I just love these discussions and learning about new parts and ways to do things. A big thank you to everyone sharing info and a big thank you to the tireless efforts by the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 14:01:09 Chris Albertson wrote: > Not really newer, just different specs. The "2" version goes up to > only 16 volt and is used for automotive motors powered from 12 lead > acid batteries. The "3" has a higher voltage rating. I think some > other slight

Re: [Emc-users] driver for a DC motor for a BS-1.

Not really newer, just different specs. The "2" version goes up to only 16 volt and is used for automotive motors powered from 12 lead acid batteries. The "3" has a higher voltage rating. I think some other slight differences too. What you are really doing here is building a DIY servo motor.

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 12:55:16 Chris Albertson wrote: > Gene just Google the part number "VNH3SP30". Polulu has them. It is > in fact my "go to" driver. These were developed for automotive use > for things like driver seat adjustment motors. > > Polulu's version of this has reverse

Re: [Emc-users] driver for a DC motor for a BS-1.

I see that some of these use the VNH2SP30 and some use the VNH3SP30. Is one of them a newer revision of the same chip? > On Oct 15, 2020, at 12:02 PM, Chris Albertson > wrote: > > forgot the link https://www.pololu.com/product/705 > This is different >

Re: [Emc-users] driver for a DC motor for a BS-1.

forgot the link https://www.pololu.com/product/705 This is different because the Polulu version has a MOSFET to protect from connecting the power supply backward. This likey matters more in battery-driven projects. But really they are all the same H-Bridge. Just buy one rated for the volts

Re: [Emc-users] driver for a DC motor for a BS-1.

Gene just Google the part number "VNH3SP30". Polulu has them. It is in fact my "go to" driver. These were developed for automotive use for things like driver seat adjustment motors. Polulu's version of this has reverse voltage protection but they seriously de-rate the chip. Just read the

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 12:28:49 Thaddeus Waldner wrote: > Here’s the same item on eBay for 12 bucks plus shipping from Nevada: > https://www.ebay.com/itm/Full-H-Bridge-Motor-Driver-Board-VNH3SP30-30A >-5-5V-36V-DC/184440701488?hash=item2af185c230:g:1SoAAOSwdvlfWS3F >

Re: [Emc-users] driver for a DC motor for a BS-1.

Here’s the same item on eBay for 12 bucks plus shipping from Nevada: https://www.ebay.com/itm/Full-H-Bridge-Motor-Driver-Board-VNH3SP30-30A-5-5V-36V-DC/184440701488?hash=item2af185c230:g:1SoAAOSwdvlfWS3F

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 08:32:07 Roland Jollivet wrote: > Maybe this is good for you, if available locally; > > https://www.olimex.com/Products/Robot-CNC-Parts/MotorDrivers/BB-VNH3SP >30/open-source-hardware > I give up, none of the 3 USA distributors are carrying that item. > On Wed, 14 Oct

Re: [Emc-users] driver for a DC motor for a BS-1.

On Thursday 15 October 2020 08:32:07 Roland Jollivet wrote: > Maybe this is good for you, if available locally; > > https://www.olimex.com/Products/Robot-CNC-Parts/MotorDrivers/BB-VNH3SP >30/open-source-hardware I don't believe it is. paypall refuses to let me in without a valid smart phone

[Emc-users] driver for a DC motor for a BS-1.

Maybe this is good for you, if available locally; https://www.olimex.com/Products/Robot-CNC-Parts/MotorDrivers/BB-VNH3SP30/open-source-hardware On Wed, 14 Oct 2020 at 22:42, Gene Heskett wrote: > After it finally was delivered, testing looks good but now I need a > controller, smaller and

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 14 October 2020 17:20:46 Chris Albertson wrote: > A good place to look for DC motor drivers is Polulu. Here is what > they have. I bet you can use one from the "mid-power" section. > https://www.pololu.com/category/11/brushed-dc-motor-drivers > > All of these take PWM and a few

Re: [Emc-users] driver for a DC motor for a BS-1.

On Wednesday 14 October 2020 17:48:06 Andy Pugh wrote: > > On 14 Oct 2020, at 21:42, Gene Heskett wrote: > > > > so what > > do we have in our linuxcnc toolbox that looks like a bi-dir pwn > > controlled twin H bridge to run a 24volt brushed PMDC motor > > Maybe 7i40? But what’s the problem with

Re: [Emc-users] driver for a DC motor for a BS-1.

> On 14 Oct 2020, at 21:42, Gene Heskett wrote: > > so what > do we have in our linuxcnc toolbox that looks like a bi-dir pwn > controlled twin H bridge to run a 24volt brushed PMDC motor Maybe 7i40? But what’s the problem with using the Pico one?

Re: [Emc-users] driver for a DC motor for a BS-1.

A good place to look for DC motor drivers is Polulu. Here is what they have. I bet you can use one from the "mid-power" section. https://www.pololu.com/category/11/brushed-dc-motor-drivers All of these take PWM and a few pins for forward, reverse brake. These modern drivers are so good there

[Emc-users] driver for a DC motor for a BS-1.

After it finally was delivered, testing looks good but now I need a controller, smaller and lower voltage than one of Jons pwm-servo's. This motor supposedly turns 220 rpms no load with 24 volts applied. It has an encoder on the rear which is making a 5.4khz quadrature signal when its running