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Elijah, I am also confused by all the reports! So please get some more opinions. My personal choice would be for Standard over Alpha. But maybe you are the type of person who prefers a sports car...

Mike, I have those bits lying around the shop - come and collect.

Elijah, if I were you I would buy the PRT Standard instead of the Alpha. (I live in Africa). If you place your order now, your shipping date will only be in November (or later) and then the Standard...

Mike, don't forget the cost of upgrading your building's power supply and airconditioning when going to that power-hungry Alpha.

A 1/4" shaft won't do for springloading the pinion against the rack.

From a mechanical viewpoint, those Gecko's are fairy heavy and I'd be nervous of the way they are attached to the "motherboard". Under static conditons probably okay, but don't put the control box...

3) Running in millimeters must be as good (or as bad) as running in inches. I don't permanently want to sit with a poor cousin of the main software.

4) The z-axis must never creep down.

5)...

For a long time the ShopBotters complained about chattery motion. ShopBot did not listen. Two alternative solutions were developed by individuals outside of ShopBot. Now ShopBot copies those efforts...

Mike, does your Colombo have a switch or a thermistor? I have already stalled my spindle and tripped the thermistor. It doesn't really matter how hot the day is, but rather how careless one is to...

Done a little more homework. Seems that standard thermistor relays trip at between 3100 and 3600 ohm and reset at about 1600 ohm. This allows the temp to go 15 degrees over nominal on a single...

This "conversion" debate is mostly focussing on resolution, cut quality and speed. These factors havn't bothered us as much as reliability. We havn't blown a Gecko-drive. Mach3 gives us something...

Wonder if the ez-Router "beltbox" would be an economical/easy fit.....hmmmmm

Mike, these standardised thermistors are non-linear, but in a good way. Their resistance increases dramatically from 550 ohm to 1330 ohm when exposed to temperature within 5 degrees C of the...

S4 on Yaskawa appears to be a "digital" input and unsuitable for an analog device like a thermistor. (I don't know which Yaskawa is being used - the E7 manual (linked above) mentions "analog" inputs...

One can't help deducing that this ShopBot PRT4g comes as a reaction to Alan's Ascension and Dirk's Agek. I know Dirk put a lot of work into preserving the use of SB software with Geckos, now it would...

Why would we want so many drives? The z-axis is not that fussy and the current Allegros can be retained for that. And then the SB software doesn't square the gantry, so we might even be able to use...

John, in this post you can see what SB is offering as a cross-supports now - much stronger.
Our tables also have solid steel cross supports under about 1.5" of MDF. We can hear how the MDF and...

These Thermik thermistors are used by HSD. A good "thermistor relay" ensures the following:


5332

I have a Siemens 3RN relay at the moment, and I see that it puts 2V and 5mW to the...

Gordon, you appear to be using thermoswitch terminology "...for a Normally.Closed. connection. If the thermistor opens... ". I am still concerned that the difference between a thermistor and a...

Harold, sorry I went to bed and dropped out of the thread for a while. The bigger marks on those cuts are irregular (at odd intervals), and they may even be caused by tiny dirt stuck on some v-roller...

Evan, that sort of confirms that SB ignores the thermistor. I wouldn't want the heat gauge of my car to be disconnected.

Thanks a lot for that info Evan!

Strange, when I asked them for an electric fan (EL part of the number) version for the 3.5kW MT1073-140, they offered a slightly shorter armature MT1073-120...

Harold, those marks are very uneven/irregular. Reckon some mechanical maintenance would get you a smoother result.

Just wondering, if we are heading towards 10:1 ratios, we could be dumping...

John, you notched your steel cross-supports for an indexer, if I remember correctly? Reckon your steelwork is the culprit. The wood wouldn't be able to move if the steel were holding it firmly.

Phil, is there a model number (and power curve number) stamped on the nameplate? (This will help to figure out its max speed and bearing type etc. A 2.25HP electric fan spindle is not immediately...