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  1. PRS-Alpha, 48X96 w/2.2 HP Spindle - For Sale

    A good friend, Jeff Bishop, has decided to sell his PRS-Alpha, 48X96, with 2.2 HP Spindle after he sufferred an accident three years ago that makes it impossible for him to use his Shopbot. The...
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    4,268

    The G202 stepper driver has a common 5VDC on...

    The G202 stepper driver has a common 5VDC on terminal 10. A logic signal on the G202 is ACTIVE when the signal is pulled to GROUND.

    The G203v stepper driver has a common GROUND on terminal 10. A...
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    3,152

    I agree with Brady on this. The specs (what...

    I agree with Brady on this. The specs (what little are published) don't look bad. The "jog" speed is slow and the "cut" speed is even slower, but with the correct cutter and the correct feed speed,...
  4. Thread: Hdd crash

    by richards
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    3,058

    Using a motherboard's "built in" raid controller...

    Using a motherboard's "built in" raid controller can lead to problems IF the motherboard fails. The replacement motherboard may not use the exact same on-board controller, which will make it...
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    Sometimes it's best to hire an expert. An...

    Sometimes it's best to hire an expert. An electrician with a meter should be able to find the problem in about 15 minutes, so the cost would be minimal.
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    Several Shopbotters have requested the update. I...

    Several Shopbotters have requested the update. I hope that I've responded to all of you. If you haven't received the update, please send me another email with "FreeDoors" as the subject. (My email...
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    29,409

    It's been a long time since Bruce Clark and I...

    It's been a long time since Bruce Clark and I worked together on FreeDoors. The program is still available on Bruce's website (http://home.centurytel.net/bwclark/).

    Bruce wrote the GUI part which...
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    If you have a volt meter, troubleshooting a...

    If you have a volt meter, troubleshooting a contractor is fairly simple. You said that you could see the contactor operating properly. That means that the voltage to the coil is working as...
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    3,020

    Anyone building a custom project that can't be...

    Anyone building a custom project that can't be resold to someone else MUST collect up front, before the work is done. Don't allow anyone to dictate to you how you run your business. You've made the...
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    Jack, If you follow the logic behind the...

    Jack,

    If you follow the logic behind the recall, not only the handle, but any metal touching a PC-7518 router could give a fatal shock. That doesn't make sense. If you ground the frame of your...
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    In the United States, a three-wire plug has a...

    In the United States, a three-wire plug has a Hot, a Neutral and a Ground. A three-wire receptacle has a Hot, a Neutral and a Ground. On the router, the Ground wire is attached to the frame. The...
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    I'm not that concerned about the "fix". If the...

    I'm not that concerned about the "fix". If the router is used with a grounded plug and used properly, it doesn't look like there would be any danger. Adding a insulated base seems to be something...
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    The G203v stepper drivers are my driver of...

    The G203v stepper drivers are my driver of preference, but I've used the G202 without any problems. Geckodrive.com still sells the G202 for $144 each plus shipping. Click on Products/Stepper Motor...
  14. The G202 is still available from Geckodrive.com...

    The G202 is still available from Geckodrive.com for $144 each plus shipping. Click on Products and then on Legacy Products.
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    2,482

    Stepper motors need to receive one pulse per...

    Stepper motors need to receive one pulse per step. Those pulses must arrive at the stepper driver within the expected time. Also, a stepper motor needs to accelerate from standstill to full speed...
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    4,111

    I agree with Joe. If you like tinkering with...

    I agree with Joe. If you like tinkering with electronics (as I do) and don't mind tinkering with mechanics (I don't mind, but the mechanics have to be simple), then fixing up a Shopbot will be easy...
  17. Thread: vacuum pump

    by richards
    Replies
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    1,653

    Even porous material like MDF can be held down...

    Even porous material like MDF can be held down with a small pump if you use backing paper (sticky shelf liner) on the back of the material.
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    It's worth $7,500 or more. Getting the lowest...

    It's worth $7,500 or more. Getting the lowest price isn't nearly as important as getting a nice machine that can easily be adjusted to be equal to any other Shopbot. With the help available on the...
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    I agree with Brady that the best drive system...

    I agree with Brady that the best drive system would be to use belt-drives. I converted my PRT-Alpha to use 3:1 belt drives (20-tooth pulley on the motor, 60-tooth pulley on the drive shaft). There...
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    I had to get a city business license which...

    I had to get a city business license which required permission from anyone living within 200-feet of my home. Along with the "no customers on premise" and "no employees" rules, the noise restriction...
  21. RadioShack has some adjustable wire strippers,...

    RadioShack has some adjustable wire strippers, Model: 6400223 (RadioShack brand) and Model: 84-213 (Stanley brand) that can be adjusted for light gauge wire. I've used the Stanley 84-213 for years...
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    I use gnucash for bookkeeping purposes, but it...

    I use gnucash for bookkeeping purposes, but it doesn't have all of the features expected in a "real" business accounting system. It doesn't have payroll, inventory control, purchase orders, or Point...
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    The system looks organized. A business is not...

    The system looks organized. A business is not just about making "things", it has to include making a profit. Keeping track of every expense and pricing every item sold to produce a profit is...
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    On my old PRT-Alpha, if I remember correctly, the...

    On my old PRT-Alpha, if I remember correctly, the JOG command enabled the stepper driver to change the number of steps per revolution from 10X to 1X (or 1X to 10X). The Alpha drivers could send two...
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    I believe that Brady is very politely telling you...

    I believe that Brady is very politely telling you to slow down. The "offset" is a classic indication that the closed loop system cannot keep up with the physical forces expected. There is no...
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