Sizing a Mill
Sizing a Lathe
#1 Advantage of
Magnetic Scales

#2 Advantage of
Magnetic Scales
Installing a Mill
Kit - Part 1 of 4
Installing a Mill
Kit - Part 2 of 4
Installing a Mill
Kit - Part 3 of 4
Installing a Mill
Kit - Part 4 of 4
Installing a Lathe
Kit - Part 1 of 4
Installing a Lathe
Kit - Part 2 of 4
Installing a Lathe
Kit - Part 3 of 4
Installing a Lathe
Kit - Part 4 of 4
EL400 Display Overview
EL700 Display
Part 1 of 4
EL700 Display
Part 2 of 4
EL700 Display
Part 3 of 4
DRO PROS Intro Video
ARC Machining
Incline Tool Position
ES10 Overview
Sub Datum Memory
Line Hole Position
Bolt Hole Circle
Parameters Setup
Choosing Your Scales
Power Off Memory
Center Find Function
Changing Scale Direction



Order Line & Tech Help - Call now 1-707-452-8434

We speak English - We answer our phones - Lifetime Warranty on magnetic kits!

Magnetic Scales cannot be broken - Coolant & Dust Proof - Cut to length



Need to exchange a scale? Click HERE to download our Exchange Procedures


Need us to repair something? Click HERE to download our Repair Procedures

Welcome to the DRO PROS library of documents:

General documents:

  "How to Cut Magnetic Scales" "Cutting Magnetic Scales for a 2 Axis Lathe" worksheet "Cutting Magnetic Scales for a 2 Axis Mill" worksheet "Cutting Magnetic Scales for a 3 Axis Mill" worksheet
  Choosing between a 2 or 3 Axis Digital Readout Kit "How to choose a DRO" "Diameter Mode Dilemma" Choose the Right Size Scales
  MagnaSlim Scales & Readheads Magnetic Scale Advantages Std Size Magnetic Scales Magnetic Scale / Display Malfunction
  Installation Hints How to Install Magnetic Tape Touch Probe Center of Circle Error
  How to Buy a Lathe Validating DRO Movement Centering the Scales  

Electronica EL300 documents:

  EL300 Operational Manual EL300 readout EL300 Mill installation instructions EL300 Lathe installation instructions
6 EL300 Operational Manual
  EL300 Lathe Setup Changing EL300 Read Direction Calibrate an EL300 display Reset EL300 Display
  EL300 Bolt Hole Circle Tap and Die Sizes    

Electronica EL400 documents:

  EL400 Operational Manual EL400 readout EL400 Mill installation EL400 Lathe installation
  Changing EL400 Read Direction EL400 Lathe Setup EL400 Power Off Memory EL400 Bolt Hole Circle
  EL400 Tool Offset EL400 Half Function EL400 Zero Beep EL400 SDM function
  EL400 Arc Contouring EL400 4 Axis tips and Tricks EL400 3 Axis Display - Center of Circle EL400 2 Axis Display - Center of Circle
  EL400 Line Hole EL400 Angle Hole EL400 Grid Hole EL400 Distance to Go
  Installation Hints Validating DRO Movement Magnetic Scale / Display Malfunction Reset EL400 Display
  EL400 LEC Calibration EL400 SLEC Calibration EL400 LEC and SLEC Error Removal EL400 Calculator
  S1 Magnetic 6" - 40" Scale Specs S2 Magnetic 60" - 80" Single Rail Specs J2 Magnetic 80" - 240" Jointed Rail Specs Tap and Die Sizes

Electronica EL700 documents:

  EL700 Operational Manual EL700 SDM function EL700 Power Off Memory Validating DRO Movement
  EL700 LEC Calibration EL700 LEC Removal Tap and Die Sizes  
Electronica EL750 documents:    



The following drills and taps are helpful when installing Electronica kits:


Scale Endcaps M3 x .5 plug tap    Enco Part #510-1218
Mounting the Scales M4 x .7 plug tap    Enco Part #510-1272
  M4 x .7 bottom tap Enco Part #510-1170
  3.30mm drill for M4 taps Enco Part #317-8273
Scale & Readhead Brackets M6 x 1.0 plug tap Enco Part #510-1299
  M6 x 1.0 bottom tap Enco Part #510-1213
  5.00mm drill for M6 taps Enco Part #317-8286



eBay "El Cheapo" vs. DRO PROS

But I can still save $5 and get an eBay special from some guy I can't understand or talk to!

Yes, we understand. We all want to get 'a bargain'. But trust us, you don't want to go there. Besides the fact you can't talk to these guys if you have a question, they don't provide a written warranty, if something breaks you can't get replacement parts, etc. etc, might we suggest you consider the quality of the manual?

We've all seen the eBay specials where the listing includes an English manual. But have you actually read the "English Manual" included with our competitors kit? Of course you haven't. Because if you did, you probably wouldn't buy the kit. But in order to see the manual, you'd first have to buy the kit. Quite the dilemma. Well, we have a solution - we did buy the kit, and we're happy to show you what you really get! Check out the two excerpts below explaining "Bolt Hole Circle", probably the easiest to use (and explain) function on a DRO:

From the DRO PROS 3M Manual:

- Bolt Hole Circle -

From the Competitions Manual:

- Bolt Hole Circle -

Example of a Full Color Manual Example of our Competitors Manual

(Click on the documents above to open them up)

(Make sure to check out the first remark on the last page of the competitions manual... and no, we didn't make this up - this is the manual you get!!)

So if this is the easiest to explain function, how well do you think their manual explains ARC procedures?

Remember, the very first moment you have a question, DRO PROS customers are going to call our toll free number and get the issue resolved immediately with an English speaking American.

Our competitors customers are going to wonder what in the world they were thinking when they saved $5. You be the judge!



Why should you buy from DRO PROS?

We speak English - We answer our phones - Same day shipping

Veteran owned, Veteran managed - and proud of it!


Our goal is to make customers for life. We feel that, in the long run, treating customers right will yield much more than simply "going for the sale". In accordance with that, we have attempted to pass on some ideas to help you, the customer, in completing your purchase decision:


Price. Probably the most talked about factor when buying a digital readout. Price can also be the most misleading, and perhaps worst way, to judge a digital readout kit. We've all heard the old adage, "You get what you pay for." Before the internet, it was true, price did generally correlate directly to value. But that was yesterdays economy. All resellers obtained their goods the same way, and therefore incurred the same costs. In today's economy, the market has changed drastically. At DRO PROS, we import and sell directly to you. Unlike our competitors, we do not have Western and Eastern sales divisions and multi layers of management to support. One location, one cost, and the savings get passed on to you!


Intuitiveness or "Ease of Use". Probably the most important, and hardest to determine factor when buying a readout. Think in terms of after the sale. Even if you get an absolute 'rock star' bottom line price that would make William Shatner proud, if the digital readout is not user friendly, you still didn't get a 'deal'. The whole point of getting a digital readout is to make your work easier and more enjoyable. If the digital readout is poorly designed, too complicated, if the display isn't bright enough, or in other words is 'user unfriendly', you'll regret your purchase decision every time you turn it on. It simply won't matter what you paid, it's not worth it!


Support. Most likely the second most important, and perhaps most overlooked factor when buying a digital readout. Imagine trying to reach a technician when you've bought a digital readout from an overseas reseller! Yet every day, people "save" $50 and buy products on eBay without stopping to think what will happen when they need service or tech support. Some digital readout resellers don't even publish a phone number! While our competitors continue to pare down or even totally eliminate their customer support, we continue to expand our Customer Service. Our Video Tutorials are the best in the industry, and are available free for you, our customers. Our tech help is the best in the business - our techs all know our readouts inside and out. Nobody knows digital readouts like DRO PROS!


Warranty. DRO PROS is proud to offer the industries safest, longest, lifetime warranty on all of our Electronica magnetic scale kits. DRO PROS brand warranty claims are handled directly by DRO PROS. No run-arounds, no hassle! Something not working as expected? Call us, don't get redirected overseas like the other guys!


Parts. Can you believe some resellers don't carry parts? That's right, buy from the "other guys", break a scale, and you get to replace the entire digital readout kit! Don't assume you can just go buy a different brand scale, either, because most manufacturers use different connectors on their scales. If that wasn't enough, even among those with a common connector, such as a DB9, most are hard wired differently. Finally, don't overlook the cost of parts. At DRO PROS, an 800mm replacement scale will cost you $197. A similar scale sold extensively by a European company will cost nearly $700! Finally, we have a massive inventory of parts, so rest easy - a replacement part is only a phone call away!


The Best Value. We literally search world-wide for the best value digital readout products on the planet. If there was a better digital readout package to be sold, we would be selling it. Yes, we've seen cheaper units on eBay, but there is a reason they're cheaper. Think poor quality, no parts, no manual, non-existent customer service, poor product fit/finish etc.


Customer Service. We pledge to never "over sell" you on a product that won't work well for you. Our philosophy is to try and save you money and get the best value kit tailored to the machinery you have. Many of our customers are surprised when we recommend against buying a more expensive brand. Again, our philosophy is to build customers for life. Give us a call and let us save you money!


Shipping. Most orders ship the same day, the next at the latest. We do not 'drop' ship, we have our own massive warehouse of inventory right here on site. We use UPS, you'll get a tracking number emailed to you immediately, and we cover all shipping insurance automatically.


The Company. DRO PROS is a veteran owned, American company. We enjoy selling quality products at competitive prices. We believe that  providing the best customer service is the key to success. No other company spends more time on the phone with customers than we do. Even in a down economy, our company continues to thrive and grow. We look forward to earning your business! 


The Bottom Line. Our line of digital readout's are simply the most user friendly readouts on the planet. Because of our direct marketing structure, they're also extremely affordable. Coupled with our extensive customer service and affordable parts, our Digital Readout products are simply the best value on the planet.




Domestic Shipping to the United States: All digital readout shipping is done via UPS for a flat rate of $43. You'll get a tracking number emailed direct to you from UPS, enabling you to track your shipment door to door! We cover insurance against any potential shipping damages, so no hidden fees here!


International Shipping to Canada: All of our DRO shipping is done via UPS. We charge a flat fee of $80.


International Shipping elsewhere: All of our DRO shipping is done via the United States Postal Service via a flat rate of $140.


Industry Leading Unlimited Lifetime Warranty

Electronica magnetic kits = Unlimited Lifetime Warranty

DRO PROS brand warranty claims are handled directly by DRO PROS.

No run-arounds, no hassle!


At DRO PROS, we take care of our customers. Have an issue or need some help? Let us take care of it with a toll-free call to California!


Call us now at 1-707-452-8434


We accept credit cards, checks and money order for payment



Call us now at 1-707-452-8434 for all your digital readout needs!



4992 Allison Parkway Suite G

Vacaville, CA 95688 US

Phone: 707-452-8434



(707) 452-8434     (707) 452-8437     (877) 628-6028

Our Kit and Part Prices always beat Heidenhain Newall Acurite Sargon & Fagor!


Unlimited Lifetime Warranty on Magnetic DRO Kits