RE: [CAD_CAM_EDM_DRO] 20 Amp 80 V $99 DC Servodrive
Posted by
David Howland
on 2000-07-05 13:08:02 UTC
Nuts & Volts ran an article (which has a few comments from the group) for a
servo controller from JR KERR Prototype Development (www.jrkerr.com), called
the PIC-SERVO Motor Control Board, and describes the capabilities for DC
Motor at 48V Max., 3 Amp continous current max. I expect that as more
members get copies of the July Nuts and Volts, there will be other comments
about the article. The article concerns adapting the PIC-SERVO to bench top
mills. The article does a good job of outlining the entire project and
includes a bill of materials. The web site is filled with info and I was
left with the impression that the article laid out a pretty good blueprint
of adding servo's to a mill. It is just a matter of time before someone
begins the discussion of using what is offered and adding larger
capabilities. Amplifier and larger motors and so on. Because the article
illustrates a blueprint of the entire project, questions will arise about
the compatibility of swapping out specific components. Have you read the
article yet?
When applying your servo controller to a 3 axis mill of the Bridgeport
class, what sort of a bill of material do you believe makes of the entire
list of what makes g-code initiate motion? I am willing to put together a
box of components when I'm pretty sure they will all go together and result
in a 100% working thing in the end. What is the compatibility of your servo
controller board and others and of the rest of the components and software
available? Your board sounds like it is stronger than the PIC-SERVO
Controller, and the article in Nuts and Volts may help both your efforts and
those of the JR KERR. What do you think?
-----Original Message-----
From: Mariss Freimanis [mailto:geckohall@...]
Sent: Wednesday, July 05, 2000 12:07 AM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: [CAD_CAM_EDM_DRO] 20 Amp 80 V $99 DC Servodrive
Hi,
This is a shameless cheap advertising ploy. I got my servodrive
prototype boards (48) from the PCB fabricators and they work great
after I fixed my numbskull mistakes on them.
I will offer them at a $99 price with the understanding they are beta
site prototypes. I would welcome and need any user comments on how to
improve them before I run a production run of 1,000 next month.
Anyone dissatisfied with them will get at refund or will be upgraded
to the production versions in August.
The drive will be called the G320 and it is a Step and Direction
input PID positional servo drive. The specs are:
24 to 80 VDC power supply
20 Amps max current ( 1-2 Hp class) thermal considirations
+/- 128 count following error
0 to 20 Amp Pulse by pulse current (torque) limiting (trimpot)
Analog PID co-efficient trimpots (Damping and Gain)
250 kHz maximum pulse rate
2.5" square footprint, 0.85" high
3.6 oz weight
Self-powers encoder (+5VDC, 100 mA max)
All sorts of broken-loop protection
Self-restart after fault detrction (2sec)
Where it stands now is the prototypes work very very well; I am am
very pleased with them. There is no can-art or user documentation. It
will take me one week to generate both.
Anyway, if anyone is interested please email me at geckohall@...
and I will set you up to try them with whatever support is needed.
They really are great drives and I am proud of them.
Mariss Freimanis
Geckodrive Inc.
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bill,
List Manager
servo controller from JR KERR Prototype Development (www.jrkerr.com), called
the PIC-SERVO Motor Control Board, and describes the capabilities for DC
Motor at 48V Max., 3 Amp continous current max. I expect that as more
members get copies of the July Nuts and Volts, there will be other comments
about the article. The article concerns adapting the PIC-SERVO to bench top
mills. The article does a good job of outlining the entire project and
includes a bill of materials. The web site is filled with info and I was
left with the impression that the article laid out a pretty good blueprint
of adding servo's to a mill. It is just a matter of time before someone
begins the discussion of using what is offered and adding larger
capabilities. Amplifier and larger motors and so on. Because the article
illustrates a blueprint of the entire project, questions will arise about
the compatibility of swapping out specific components. Have you read the
article yet?
When applying your servo controller to a 3 axis mill of the Bridgeport
class, what sort of a bill of material do you believe makes of the entire
list of what makes g-code initiate motion? I am willing to put together a
box of components when I'm pretty sure they will all go together and result
in a 100% working thing in the end. What is the compatibility of your servo
controller board and others and of the rest of the components and software
available? Your board sounds like it is stronger than the PIC-SERVO
Controller, and the article in Nuts and Volts may help both your efforts and
those of the JR KERR. What do you think?
-----Original Message-----
From: Mariss Freimanis [mailto:geckohall@...]
Sent: Wednesday, July 05, 2000 12:07 AM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: [CAD_CAM_EDM_DRO] 20 Amp 80 V $99 DC Servodrive
Hi,
This is a shameless cheap advertising ploy. I got my servodrive
prototype boards (48) from the PCB fabricators and they work great
after I fixed my numbskull mistakes on them.
I will offer them at a $99 price with the understanding they are beta
site prototypes. I would welcome and need any user comments on how to
improve them before I run a production run of 1,000 next month.
Anyone dissatisfied with them will get at refund or will be upgraded
to the production versions in August.
The drive will be called the G320 and it is a Step and Direction
input PID positional servo drive. The specs are:
24 to 80 VDC power supply
20 Amps max current ( 1-2 Hp class) thermal considirations
+/- 128 count following error
0 to 20 Amp Pulse by pulse current (torque) limiting (trimpot)
Analog PID co-efficient trimpots (Damping and Gain)
250 kHz maximum pulse rate
2.5" square footprint, 0.85" high
3.6 oz weight
Self-powers encoder (+5VDC, 100 mA max)
All sorts of broken-loop protection
Self-restart after fault detrction (2sec)
Where it stands now is the prototypes work very very well; I am am
very pleased with them. There is no can-art or user documentation. It
will take me one week to generate both.
Anyway, if anyone is interested please email me at geckohall@...
and I will set you up to try them with whatever support is needed.
They really are great drives and I am proud of them.
Mariss Freimanis
Geckodrive Inc.
------------------------------------------------------------------------
Life's too short to send boring email. Let SuperSig come to the rescue.
http://click.egroups.com/1/6137/4/_/423600/_/962770021/
------------------------------------------------------------------------
Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems, for CAD, CAM, EDM, and DRO.
Addresses:
Post message: CAD_CAM_EDM_DRO@egroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@egroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@egroups.com
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Moderator: jmelson@... [Moderator]
URL to this page: http://www.egroups.com/group/CAD_CAM_EDM_DRO
FAQ: http://www.ktmarketing.com/faq.html
bill,
List Manager
Discussion Thread
Mariss Freimanis
2000-07-04 21:07:01 UTC
20 Amp 80 V $99 DC Servodrive
David Howland
2000-07-05 13:08:02 UTC
RE: [CAD_CAM_EDM_DRO] 20 Amp 80 V $99 DC Servodrive